blowers???

ok..ive never really looked into blowers much so i have no idea of what it is?? i want to kno how they work wat they run off of?(the belts?) basically everythign you kon i want to kno??? any links that explain it would help and r there wany good brands to go for if i was gonna buy one

When someone says a blower they are usually refering to a Roots Blower/Supercharger. Thoes bigassed (and IMO ugly) things sticking out of some "Muscel" cars hoods and on top of Top fule dragsters are Blowers. The 3 most common types of FI are Blowers, Cyntrificals Superchargers, and turbo's. Turbo's are by far the most efficent and best for the engine.
The way a turbo works is simple. Exaust comes out of the manifold into a turbine, it spins the turbine and goes out the rest of hte exaust system. the energy harnassed from the turbine spins an impeller inside a compressor. that compressor feeds the intake.

cyntrifical superchargers are basically just the compressor side of a turbo being spun from a belt driven by the engine. not as efficent as a turbo but more efficent than a roots blower (takes less torque to spin)
a blower compresses air in an intirely different way. think of a blower like 2 rods spinning in opposite directions with little air tight cork screwed fins coming off of the rods. as the rods spin at high RPM's they snatch air, trap it then force it into the engine. sort of like how an automatic base ball thrower throws its balls. these take more torque to turn and are there for least efficent (as all things in the Muscle car era, lol) basically the larger the more boost they are able to create. the bloweres used on top fule dragsters are so inefficent that htye take 600ft/lbs of torque to spin but crank out 40+ psi of boost. most bloweres you see are pushing .5-1 bar of boost. (6-15psi)

It is my understanding (not to argue), that the term "blower" is used whenever somebody is referring to any type of Supercharger. Maybe I'm mistaken...

I think of a blower as being slang for a positive displacement supercharger. Centrifugal superchargers are usually more efficient than the positive displacement chargers. The benefits of positive displacement chargers is thier low-end grunt. The bad things are: inefficient(more heat), easily destructable(even a small backfire can completely destroy the supercharger and/or the engine. This is mostly on carbureted engines.), belt driven, takes a lot more power than turbochargers, not easily adjustable, and the sound effects are not as cool as turbocharged cars.lol IF you want to use a supercharger, my advice would be to use a centrifugal supercharger. They are much more efficient and do not taper off in the higher RPMs like the positive displacements.

a positive displacement and roots are the same thing arent they?

Roots is one type of positive displacement compressors. The Lysholm screw compressor is also of positive displacement type, but it's more effective. Positive displacement refers to that the compressor is using a displacement to compress the air (it uses a displacement which is decreasing in volume). The other type is the dynamic compressors like axial and centrifugal compressors which are changing the enthalpy of a streaming fluid.

CB why would they use blowers instead of turbos, if turbos are the best?
Considering that top fuel teams have a huge budget.

The advantage of supercharger over turbo is the low rpm power.

P.S blowers=superchargers
turbos=hairdryer/puffer
At least thats wat we call them in australia

they use blowers cause turbos are outlawed.

why are they outlawed?

for the same reason variable geometry wings are outlawed.

they make the car too fast!


at some point someone decided that safety was cool and forgot that racing is about going the fastest

CB why would they use blowers instead of turbos, if turbos are the best?
Considering that top fuel teams have a huge budget.

The advantage of supercharger over turbo is the low rpm power.

P.S blowers=superchargers
turbos=hairdryer/puffer
At least thats wat we call them in australia

xyfalconsrock :nono: , if you knew anything about the dynamics of a turbocharger you would know that Turbos are for more efficent. your idea that they use blowers to help with low end power, well top fules launch from 7,000+ RPM and the RPM's never drop below 4,000. Turbos are outlawed in the NHRA. why? well because the NHRA is retarded and wants everyone to be racing the same basic vehicle just like NASCAR. ever see a non NHRA legal funny car? 99% of the time they are twin turbo.
:cwm27:
now your other idea that turbos DONT have lower RPM power. if the turbo has been properly fitted for an engines exaust flow turbo lag is slim to none. turbos begin to spool by 2,000 RPM and are making full boost by 3,000. ever driven or ridden in a properly built factory turbo'd car such as a Porsche 911 carrera Turbo? well if you have then you notice that unless you punch it from idle turbo power is almost instantaneous.
:uhoh:
Blowers are as much as 50% less efficent compared to a turbocharger. and you state ment Blower=supercharger...well, not to show your ignorance, but a turbocharger is a supercharger. the deffanition of a supercharger is any type of compressor feeding an engine an air pressure greater than ambient air pressure. now you may ask yourself, why are turbos far mor efficent. well its a simple fact, turbochargers get their power from a wasted energy (ie the continuously expanding exaust). a turbo (as you hopefully know) uses the flow of exaust and the exausts' heat continueing to expand the exaust gasses to turn a turbine (turbine..turbo...wow) this turbine intrun spins a cyntrifical compressor. the cyntrifical compresser that makes a cyntrifical supercharger works o nthe exact same principals as the compressor side of a turbo. now granted, a turbo's energy isnt completely free. it puts slight back pressure on the exaust stroke, but if you run 15psi with a turbo you get nearly double the power (in theory), running 15 psi on a "supercharger" (ie non turbo) gives you 50-80% more power. Why? well turning a belt driven supercharger is like turning a large A/C compressor. It takes torque to turn, the ammount of torque it takes to make a certian ammount of boost is the same over the entire RPM range, so the higher the RPM's get the more HP the supercharger is stealing.

superchargers sound so much cooler than turbos IMO, while BOVS are sweet, nothing beats the whine of a Supercharger. Superchargers let everyone know your cars got some performance to it. And you guys make it sound like superchargers rob soooo much HP from the engine. Thats not the case at all. While it does, its not a whole alot.

Also when it comes to maintanence, superchargers are extremly low. Completely self contained, very reliable, just put it on and forget it. With a turbo, you gotta watch out for oil leaks and cracks in the manifold, you need to change the oil more constantly, you have to have an intercooler to handle the extra heat, detonation is alot easier to occure because of the heat. Ive seen alot more people have problems with turbos than superchargers.

While yes turbos are more efficient than superchargers, superchargers are alot easier to take care of.

ROTFL. if your turbo is properly installed then oil leaks are an almost never, cracks in the manifold are a never, and detonation is not me prevelant than with a supercharger. gale banks said it himeself. back in the day he would run the same boost on a supercharged and turbo charged engine. in many cases 200hp greater would be seen from the turbo engine. lets say you put a blower on your engine and you happen to have a massive backfire...engine, superhcarger, everything is screwed you ahve to go buy new everything in many cases. back fire with a turbo (almost never happens because most turbo engines are fule injected now a days) and the turbo just looses boost and nothing is dammaged (besides your carburator maybe).

let me ask you this. can you controll boost from a supercharger with a turn of the wrist? oh thats right, NO. can you with a turbo...yes. manual boost controller opens the waste gate completely and you get near 0 boost or closes completely and your get 20+psi boost. with diverter vualves and turbo timing technoligy, as i said before, lag is a thing of the past. and if your pay check is short one week all you have to do to save gas is turn the boost down. what do you have to do with a supercharger? change pulleys, change the belt, and tune carburator if your car is carburated... and you dont like the wine a turbomakes under boost. IMO it sounds better than the sound of broken A/C compressor....

if turbos are so much better, why do ford and gm both use superchargers instead of turbos? Maybe its a reliability issue, and still some of the fastest production cars are supercharged. Lightning, Cobra, GTP, My Z24 Cavalier (yes its a GM kit for MY engine), and many more. Im not saying that all companies use them, but the 2 biggest automotive companies it the world use them in their most popular vehicles. Why is that?

I'm sure CB has the answer for EVERYTHING
:loser::screwy:

Ford and GM both use superchargers on their performance cars for the simple fact its 100% easyer to supercharge a vehicle. especially when talking about single turbo set ups on V engines.

aside from the fact that you brought in domesic companies. why do Porsche, Audi, Ferrari, and bugadi all use turbo in their FI vehicles? i think Porsche and ferrari know a tad more about performance than GM and especially Ford....not saying that GM and Ford dont know...its jsut when was the last time you saw a world renound supercar come from either of these companies...

1964 till 1969, the gt40
so its been 35 years since the last time we saw a world renown supercar from either of these companies.

so i think we shouldn't look to the big three for performance.

unless of course your talking about the 80's turbo dodges. but thats still 15 to 20 years ago

maybe so, but what do you think sells more

Supercharged SVT Lightning or a Porshce Turbocharged?
Supercharger GTP or Audi turbocharged?
Supercharged SVT Lightning or Ferrari Turbocharged?

i never said superchargers were more powerful than turbos, just that they are easier to use, install, and maintane. And for alot of people, thats more important. Ill take reliability anyday.

there's no turbocharged ferraris

another reason why blowers are used instead of turbos is that the largest turbos out there are designed to be driven by large displacement diesel engines. Therefore its hard to drive these turbos with the -8.0L gasoline engines that we use and turbo lag would be unbearable and power would come in an uncontrollable rush. Turbos work fine for less than 1200 hp, but over that they become far too inconsistent to use in drag racing and just cause you to lose traction once boost hits.

There are sold more turbocharged cars than supercharged, no question about that.
Turbochargers are more reliable than superchargers and needs no maintenance. For stock cars they also offer a lower fuel consumption and usually also a better torque curve with the possibility to adjust this curve very simple.

A turbocharger doesn't care about engine displacement, and all larger turbochargers are developed for diesel engines as there are no large application of high power turbochargers for gasoline engines. Even pure competition turbochargers like the ones used in CART are basicly designed for diesels but there is no problem to adapt them for competition use.

There are several turbocharged dragracing vehicles with well over 1200 hp and they run fine. Dragracing is all about maximum power, and turbochargers can offer that. But since most regulations only allow roots... If the regulations was free we would have seen turbocharged cars and probably also some with lysholm compressors.

Lag isn't a issue in racing (especially drag racing), anti-lag systems can solve this. But even ball bearing turbos, or TiAl turbines alone offer a good response.

In drag racing such as Top Fuel the power that reach the wheels are controlled by the slipper clutch, not the engine which runs full throttle.

By the way, F40 is a turbocharged Ferrari!

this is a stupid argument and i dont really care. Its all up to preference. IN MY OPINION blows are better than turbos because of reliability and ease of use. They are self contained and simple. Turbos require alot more maintanence and tunning to get them working properly. You need to have more frequent oil changes, and ive heard of a ton more problems with turbos than i have blowers. So for ME its blowers all the way.

CART does not use large turbos, they only make around 600-700 hp on methanol

superchargers don't require any maintenance either, your whole maintenance argument is pointless.

lag is an issue in drag racing, if power comes on at 300 ft and you kick sideways you have to roll out of the throttle, you obviously have never been to a real track.

Top Fuel cars do have a throttle as well as the clutch.

top fuelers dont modulate their throttle though. power delivery is controled solely through the clutch slippage which is controlled by a computer. the driver just floors it, steers and then pulls the parachutes.

and power doesnt kick in at 300 ft, they are at full boost when they launch. and even if it did kick in at 300ft the computerized clutch could easily be programed to compensate.


the GTO, GTB/GTS turbo, and F40 were all turbo ferraris or at least came in a turbo version.

actually, half the time they smoke the tires and have to back out of the throttle, if the other car also smokes the tires then they try to get back on the throttle to get the win and hope that they didn't drop too many cylinders when they backed off the throttle.

Turbochargers needs no maintenance, and they doesn't require oilchanges more often. Turbochargers typically last longer than superchargers which can require maintenance depending on their design.

With turbochargers the antilag systems used in racing together with low friction bearings lag isn't an issue, and the engine speeds never drop under boost threshold. With antilag there is no problem to have boost before launching. If the driver lifts off the throttle ALS will allow the turbocharger to continue spinning at full speed and producing boost so it's ready when the driver goes back on the throttle.

CART had above 1000 hp when the power where as highest. Turbochargers like Garrett BR74 was used which is based on a commercial diesel design but most of the turbocharger is special made. These turbochargers was very expensive so they went back to simpler turbochargers with conventional bearings and introduced a standard engine when the CART seried was restarted. But comparing to the turbocharged F1 engines from the eighties the CARTs use low boosts, usually lag are harder and harder to solve when boosts become higher.

Today 2 litre engines develope more than 1000 hp with turbocharging and are successfully used in dragracing. This would equal about 4000 hp from a turbocharged 8 litre V8 running on gasoline or above 8000 hp if running on nitromethane.

That was pretty hard to read, consider using a dictionary and someone who knows good grammar next time you does posts on here. :)

did jayson just compare a ford lightning to a ferrari? wow

audi sells way more turbo cars than pontiac
i would guess up to 3 or 4 times more cars worldwide at least twice as many in the US

and porsche has sold way more turbo cars than ford has sold lightnings

also, don't you find it interesting that the svt lightning gets 12-15 mpg vs a wrx sti which gets 18-24 mpg but the lightning only gets 70.2 hp per liter but the sti gets 120 hp per liter thats a big difference also the svt has twice as many cylinders but only one and a quarter times as much hp as the sti.

Indeed.
And besides, turbos sound cooler.
And if you have to change your oil more frequently on your turbo engine, you're not taking proper care of it.
OH, and about ALS.....it's really fuckin' cool, but it's a dead giveaway that you're using it.

hehehehehe, finally, the troops have come in. Its a funny thing that some people who support blowers whole heartedly originally bashed turbos (ie "hair dryers" WTF?) and hten where proven wrong agian and agian. so here it is.
-Turbo's are more efficent, PERIOD, end of discussion, please come agian.
-Reliablity issue should have never have come into play. but it did and, as sabb said, turbos last just as long or longer than roots.
-NHRA is gay just like NASCAR. everyone has to be driving the same basic thing. ofcourse if Turbos where legal in top fule funny car or any other type of car Turbo would be the FI of choice after one guy pioneerd giving their already 7000hp beast back its 600+ hp stolen from the Roots.
-Turbos give good power up untill infinite power. there is no threshold at which turbos stop mkaing a good torque curve. as long as the engine is supplying enough flow to spool the turbo but not so much that even the waste gate wide open cant keep it from over spooling power it good.
-Lag is a thing of the 50's and early mid-late 80's early 90's. there are cheap 300-700 dolar turbo timers and boost controllers which can do any of a few things. Virtually eliminate lag even if the turbo's compressor and turbine arent properly matched to the engine flow, as long as its not a 12.0l diesel turbo or 125cc lawn mower turbo. Regulate boost. a push of a button or a turn of the wrist can make your car go from 0.2 bar to 2.0 bar. allow for better gas mileage and better fule economy by regulating boost and fule flow acording to how your driving. allow the turbo to spool a longer life, keeping it from over spooling by proper waste gate controll and allowing the engine and turbo to cool before the car completely shuts off.

if anyone continues to argue this they are a moron.

however, i am not and never did bash blowers for what they are. yes they are easyer than turbos to install on a 454 big block. and yes they can produce some power. but turbos are better for obvious reasons...

its a day!

Turbos are called Hairdryers in australia, I don't go around making up names do i?


And if I had the money for a turbo yes it's the choice, but they cost heaps more than superchargers(conditions apply)

One more thing, I've heard turbo's doing more damage to engines than superchargers.

Example?

he cant give an example. running hte same boost they would do hte same damage from detonation. a turbo could actually do LESS because a roots has no chance to coll its air. a turbo can send its air through a intercooler (well a cyntrifical can too but that isnt hte point). one backfire on a roots and whole engine, carburator, blower is gone, ruined, time to start that performane motor over. backfire on a turbo wont do much besides unspool it. and since turbocharged cars are usually fule injected no carbs to ruine either... and if you aussies call turbos hairdryers in a derogatory maner maybe all of you are a stupid as steve erwin or how ever you spell his name "she's a beauty, eh? look at thoes large venomos fangs. if she where to bite me right now id be dead in 5 seconds"

Turbos are called Hairdryers in australia, I don't go around making up names do i?


And if I had the money for a turbo yes it's the choice, but they cost heaps more than superchargers(conditions apply)

One more thing, I've heard turbo's doing more damage to engines than superchargers.
There is a SAE paper that actually state that a turbocharged engine has a better reliability than a large low speed NA or a small high speed NA engine.

It can also be funny to note that the roots used in Top Fuel today actually were designed for large low speed diesels, just like most large turbochargers!

ive neva heard so much shit in my life
CBfryman when your I.Q and balls grow to the point where there visible on a peice of paper maybe just maybe will people forget the shit youve been saying and take u for real.
turbo's are more efficent then superchargers????
i spose thats why the paxton superchargers clutch keeps it from drawing any energy until the driver demands power....in which he puts his foot on the accelerator (which is the peddle on the far right that you press to go faster) now if you think a turbo sounds better then a blower then i sugest u get a hearing test coz by fuck your hearing it wrong.....if u think a blow off sounds good then your still nurturing the inner child coz fucks sake who wants a car that sounds like an extra loud deoderant can when u change gears.
and if you hav the money to put a superchager on an engine then it dosnt back fire.
unlike those computer controled peices of shit that couldnt power a fucking toaster.
and who told u that u cant intercool a roots blower?
ford cobras hav a water to air intercooler under the blower which happens to be roots.
yes superchargers need power to work....but for the 80hp they use they make an extra 500hp ontop of it. superchargers run full boost from the word go....no lag here girls not like its turbo cuzin that needs time to wind up threw each gear.
show me a drag car with a turbo that has a blow off valve....there shit....u spend needed seconds winding it up just to blow it out coz it sounds "good".
whoeva told u top fueled dragsters go better with turbos are pulling there dick harder then there pulling the quarter because turbos need time to warm up and down and when your running nitro methane you dont hav time...dragsters take 120 litres of fuel to run a qauter mile and 40 litres of that is to start the fucking thing.
fresh cold air is always supplied threw the supercharger where the turbo gets hotter and losses both power and oil flow the longer its run.
the exhaust valve glows white hot and the sparkplugs melt half way down the quarter and you think a fucking turbo thats gunna restrict exhaust flow and create a shit load of unwanted heat is gunna work better. grow the fuck up!!!!!

wow heres addy gets the reward for most ignorant person ever. i think i may have heard kids who drag race civics make more sense.
oh man where to start?

turbos ARE far more efficient than superchargers. period. end of discussion. maybe you dont understand the word effecient (it means in this case to produce more than you use, and turbos produce far more power than they use compared to roots blowers)

as far as sound goes thats all opinion but i like something that screams instead of whines.

i dont know what you are talking about when you say "computer controlled pieces of shit" maybe fuel injection. well all of the fastest cars made in teh last 15-20 years have been fuel injected. hell even those hillbilly ass dragsters use EFI and electronic ignition its jsut mroe effecient and makes more power. (oops theres that dang old "effecient" word again). water to air intercoolers get heat soaked reletively quickly so they are garbage for anything that runs more than a quarter mile.

man! this isnt 1985 turbo lag is all but gone. a properly tuned car wont notice it especially in a drag race where you better not let your rpm drop. top fuelers dont shift anyhow so there is never a time where they would experience it at all. at all!

you dont blow it off cause it sounds good you blow it off to protect your compressor and intercooler from the pressure wave from the closing throttle plate and the excess pressure in teh manifold and plumbing.

how in the hell does a turbo lose power and oil flow the longer its run. that doesnt make any sense at all. the heat from the turbine doesnt come into contact with the charge air (maybe a little through the shaft or where the housings are attached but that is such a negligeable amount compared to the heat from compression).

stop making comparisons without any knowledge you sound like some ignorant 16 year old kid.

and if you think your right then get some facts and numbers and PROVE someone wrong.

ive neva heard so much shit in my life
CBfryman when your I.Q and balls grow to the point where there visible on a peice of paper maybe just maybe will people forget the shit youve been saying and take u for real.
turbo's are more efficent then superchargers????
i spose thats why the paxton superchargers clutch keeps it from drawing any energy until the driver demands power....in which he puts his foot on the accelerator (which is the peddle on the far right that you press to go faster) now if you think a turbo sounds better then a blower then i sugest u get a hearing test coz by fuck your hearing it wrong.....if u think a blow off sounds good then your still nurturing the inner child coz fucks sake who wants a car that sounds like an extra loud deoderant can when u change gears.
and if you hav the money to put a superchager on an engine then it dosnt back fire.
unlike those computer controled peices of shit that couldnt power a fucking toaster.
and who told u that u cant intercool a roots blower?
ford cobras hav a water to air intercooler under the blower which happens to be roots.
yes superchargers need power to work....but for the 80hp they use they make an extra 500hp ontop of it. superchargers run full boost from the word go....no lag here girls not like its turbo cuzin that needs time to wind up threw each gear.
show me a drag car with a turbo that has a blow off valve....there shit....u spend needed seconds winding it up just to blow it out coz it sounds "good".
whoeva told u top fueled dragsters go better with turbos are pulling there dick harder then there pulling the quarter because turbos need time to warm up and down and when your running nitro methane you dont hav time...dragsters take 120 litres of fuel to run a qauter mile and 40 litres of that is to start the fucking thing.
fresh cold air is always supplied threw the supercharger where the turbo gets hotter and losses both power and oil flow the longer its run.
the exhaust valve glows white hot and the sparkplugs melt half way down the quarter and you think a fucking turbo thats gunna restrict exhaust flow and create a shit load of unwanted heat is gunna work better. grow the fuck up!!!!!

:grinno: :rolleyes:
Well here are some things i would like to point out noob.
1.) Direct Flamings are a BIG no no... i forgive you for the fact aht you are a noob, however be glad i am not a Mod because you would have a 1st chance free all expences paid vacation from AF.
2.) The fact that you drop the F-Bomb 5 times by my count shows your childish immatureity. yes i remmeber back in the day, i was like 8 and i though cussing was the coolest thing ever... untill my mom heard me and beat the living daylights out of me.
3.) It Doesnt matter when a compressor gets its power that determines its efficency, its how. ever heard of a boost controller? oh yes i can turn a knob and make my boost go from 15psi to 0psi. can your roots do that? no.
4.) The Reson turbo's are more efficent is because they get their power from a nearly wasted energy source, exaust heat/expansion. the backpressure caused by a turbine shows very minimal power losses compared to the power gaines from the compressor being spun by the turbine. maybe you would like ot read the stickey's before trying to flame.
5.) Now as for the blow off valve. BOV's are no longer in used by Mass Air Flow Sensor controlled Fule injected engines. why? well because the MAF would sence air going in, then the throttle would be closed, the BOV would vent into the atmosphere and the exaust flow sensor wouldnt account for that ammount of flow and the "check engine light" would come on and the engine would run rich for a short period of time. instead Diverter Vualves are used. which divert excess pressure back to preturbo post MAF plumbing. The reason a turbo uses a BOV or Diverter valve is to keep the turbo spooled (ohh look, one of the many technoligies preventing turbo lag) and to keep the compressor and or throttle body from being destroyed by a sudden jump in air pressure.
6.) As for your "computer Controlled POS" well fule injection isused in everything from Formula one to top fule. and you will never see a fule injected engine backfire. why? well frankly the computers know alot more about engine timing and valve timing than your wrech and screwdriver tuning a carburator and valve timing. Fule Injection is the 2nd greatest efficency jump since turbo's. they allow for greater flow, better control, and greater fule atomization.
7.) Turbo lag was eliminated even back in the days of Buick Grand Nationals. Turbo Timers, diverter/BOV's, properly maching turbine to exaust flow and impeler to desired boost have shown even as much as 3psi at idle... a properly tuned turbocharged engine will completely spool by 2,800 RPM easy. your roots takes 80hp from the crank and my turbo takes 10hp from the crank but both give the same ammount of boost and there fore the same ammount of fule and air and there fore the same ammount of gross power but net power at the crank is far different. 70hp difference...
8.) there has never been a top fule dragster to use a turbo and probably never will...why? well because the NHRA prohibits it. strictly roots only. tubos dont take time to "warm up." but they do, if you want them to last, like to have a few minutes of spinning with out creating any boost to let oil drain form the hydro bearings. but top fulers rebuild engiens after every race and trash engiens after just a few races...so turbo cool down time isnt really needed. you say that roots provide "nice cool air." sorry to breakt it to ou but when air is compressed it gets warmer. no way getting around that. however, turbos can be routed through an intercooler to cool their charge, roots blow that newly compressed extremely hot air directly into the intake manifold.
the ammount of backpressure a turbo gives is slim to none. it wouldnt raise cylender tempatures all too much and would give thoes engines the 600hp they are loosing from the roots back. and jsut ot let you know a turbo would be spooled in a top fule dragster all the way down the 1/4 mile because the enignes run at full throttle all the time and slippage and gearing are controlled by a COMPUTER controlling a clutch, so basically all a top fuler has to do is pull the throttle lever all the way back in the prestage and pull the engage gear as soon as he sees green....try to keep in a stright line and after the finish is crossed kill the engine and hit the chutes... wow that takes some balls but no skill besides reaction time.

and a word from the wise... stop cussing every other sentance. it makes you look (or proves that you are) immaure, moronic, and over all makes anyone who reads a few of your posts not even pay attention to any of your other postes because they get sick of it after a while. yes i do cuss sometimes but as you can see above there isnt one curse word and i got my correct point and point of view accross just fine. just be glad i didnt alert any mods of this rant and rave of yours. thouhg one is bound to see it soon anyway...but hopefully they will be lienient because of your noobness...

jayson..your argument abotu me using the AC to cool air can rather easly be applied here.. with a super you suck back 200 hp lets say on a 1000hp engine... reason why a super is a better choice is becous usualy they can be litterlay bolted on and there done.. turbos take a bit more work, a bit more effort, and a bit more time.. as far as maintance.. well ebtween a super and a turbo its all loose loose tehre... car=maintance simple as that.

both the turbo and the super can blow well just about anything, and make maintance more nessacery when no tproperly desinged or installed. both can caus a slew of engine problems.. a turbo you havemore control over(the waist gate) supers its pullys.. read turbo's 101 right on the main board for FI.

Did you know that jet engines have "blow off" (or more correctly bypass) valves too, to protect their compressors from surge?

The old roots leaked so much that they couldn't develope boost from low speed, today it's better but this can cause a difference in pressure ratio over the engine during the rpm range affecting the choice of cams and torque curve.
A supercharger does always affect the pressure ratio over the engine, which means that a supercharged engine may need a different set of cams.

Any forced induction engine also need heavy duty internals and usually a lower compression ratio as well as a modified fuel/management system. To fit a turbocharger with the exhaust manifold or the supercharger with the belt is the simple part when fitting forced induction to a NA engine.

Superchargers consume more power from the crankshaft of an engine compared to a turbocharged engine, which reduce the power somewhat because of the flow restriction caused by the turbine.
The adiabatic efficiency of the compressor itself depends on the type, centrifugal type superchargers have an adiabatic efficiency similar to a turbocharger compressor which is of the same type, that means up to around 80% efficiency. A roots can running with efficiencies around 50%. The lower the adiabatic efficiency is the hotter the intake air will become and the more power is needed to compress the air.

A roots is called a "blower" since it doesn't compress internally, it just feeds the air faster than the engine can consume it which cause an increase in boost while for example the centrifugal or the lysholm screw compressor compresses the air.