drove a turbo gsr

[ZackKVtec]

So my buddy swings by my house yesterday with his GSR. He's got a 6psi turbo gsr with 2.5" all the way back. The reason I'm posting this is because I got to drive my JRSC 6psi with just Intake and Cat-Back, back to back with his turbo 6psi full exhaust. I remember when i got my supercharger and everyone i talked to was telling me how much better a turbo was, and how much more efficient it is. All i can say is i was not impressed. Definetly fast up top, but god damn man, I push my gas pedal and i want to go. Driving my car first was probably a bad idea, cause i just tap the gas and your head flings back. I get in his car and mash the gas, i felt like a little kid waiting for christmas. Overall my car definetly felt faster, and my test-pipe, and header are on backorder, aka not on my car yet. The blow off valve was fun to make people look, but my charger whines like a fucker, and i love it. superchargers rule.

[clawhammer]

Cool.

Did you ever rebuilt that head?

You should take it to the twisties, you'd murder him there.

[TatII]

heh different preferences. different strokes for different folks.

yeah a 6 psi the power difference between a turbo and blower is minimal, but all he has to do is turn a knob and run 12 psi or 15 psi or 20 psi or 25 psi ( given if he has the right fuel managment to go with it ) with a blower you would have to swap pulleys to switch from high boost which might require race gas, to your street setup. for a turbo charger just lower the boost inside the car, piece of cake, when you have race gas, you gain atleast 100 more whp if your internals and fuel system can handle it.

and that the where the main advance of a turbo comes in. so yeah at lower boost and if its gonna stay at lower boost for the life of the car then yeah a low psi blower is definitly the better choice.

[2000LS1Z28]

A supercharger is better for low end grunt, but a turbo is better for top end power. I'm sure your buddy's turbo has more potential all around (Especially mileage wise). He did have to pay for it though. I mean i've seen the JR S/C kits for less then $3K. I've also heard that they are bulletproof.

For what you seem to use it for, it seems like a better application. Get some 1/4 mile times with that car. I know it will be in the 14's, just dunno how low.

[rice(er)]

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

vrooommmmm---psssssssssss---"insert bov here"--------vrooooooommmmmm-----psssssssssssss------"insert bov here"

have a nice day

[mason_RsX]

Originally Posted by TatII

heh different preferences. different strokes for different folks.

yeah a 6 psi the power difference between a turbo and blower is minimal, but all he has to do is turn a knob and run 12 psi or 15 psi or 20 psi or 25 psi ( given if he has the right fuel managment to go with it ) with a blower you would have to swap pulleys to switch from high boost which might require race gas, to your street setup. for a turbo charger just lower the boost inside the car, piece of cake, when you have race gas, you gain atleast 100 more whp if your internals and fuel system can handle it.

and that the where the main advance of a turbo comes in. so yeah at lower boost and if its gonna stay at lower boost for the life of the car then yeah a low psi blower is definitly the better choice.

but can your B18C1 and its all aluminum block, and high compression ratio handle 25psi without requiring some major modifications

I mean if your looking to go big, yeah the trubo's definately the better option...but if your looking for powerband and performance without major changes, the S/C is better



*Edit, not that im challenging your knowledge Mr. Most knowledgable person on AF...dont rip me apart now plz

[kris]

I know with my supercharger, 10psi doesnt feel as fast, as 10 psi on a turbo. I think the main reason is you dont feel the spool, but rather a flatter powerband.

[TatII]

Originally Posted by mason_RsX

but can your B18C1 and its all aluminum block, and high compression ratio handle 25psi without requiring some major modifications

I mean if your looking to go big, yeah the trubo's definately the better option...but if your looking for powerband and performance without major changes, the S/C is better



*Edit, not that im challenging your knowledge Mr. Most knowledgable person on AF...dont rip me apart now plz

of course the engine has to be able to handle it, i must've missed that point when i was pointing out the difference.

a super charger is very inefficent compared to a turbo. the difference is just less noticeble down low cause its not flowing enough to show any real difference. when i look at the compressor blade of a centrifugal blower, it has an unsual amount of blades on it, kinda like a outdated T04B which is a turbo thats like 20 years old. if you look at all the efficient turbo chargers they all have 6 blades. even the centrifugal blower still has lag.

however if your talkin about a roots blower like the ones found on the jackson racing ones, then you'll feel like your driving a larger engine. but they are very very inefficent once you start making more boost.

if you really want responsive power from a turbo, just run a tiny like the KKK03's found in the 1.8t's. those things makes full boost at like 2000 rpm. of course its all a trade off, if you want to settle for soemthing in the middle then a hybrid turbo gives good top end and decent low end. i mean i've driven my friends 1.8 LS teg with a greddy turbo kit and hes running a TD05 18G hybrid turbo and that thing spools pretty damn fast to me and has enough flow for almost 400hp. but of course that kind of power in a FWD without drag radials is useless anyways.

[ZackKVtec]

I haven't rebuilt my head yet, because I'm waiting for the summer when i have more time to deal with the head being sent out for a rebuild. So for now she "uses oil" and vtec turns on about 50% of the time.

Also for my needs/wants, a supercharger was definetly the right choice. The most i'll ever be boosting is 10 psi, and that is right about where the JRSC stops being efficient. I mean a gsr with stock compression and 10psi is gonna be no slouch. I just gotta make sure all of my fuel components are flowing properly. I have the 8psi crank pulley right now, but thats gonna go on after i rebuild the head, and replace my stock injectors and fuel pump. As for 1/4 mile times, as of right now i would expect to be mid 14's, after a head rebuild, mild pnp, full exhaust, 8psi, and fuel mods... i would be damned if im not dipping into the 13's.

Also, i got the kit for 2k, price was not really an issue though, i just wanted sc over tc. I really feel like im driving a small 8 cylinder sometimes.

edit: a small 8 that revs up to 8k

[nissanfanatic]

Honestly...

Even if you're GSR makes 300ft/lbs of torque at 1000rpm, that is still only a whopping 57whp... That doesn't get a car moving very fast.

And at 2000rpm, making 300ft/lbs of torque, we get a whopping 114whp. This STILL doesn't get a car moving very fast.

Just because your boost gauge reads 30psi at 2000rpm does NOT mean you are going to be flying. My boost gauge reads 12psi by 3500rpm and my car is still slow. It doesn't get fast until 4500rpm or so. Confirm my full boost on my dyno charts. Where the torque curve stops rising smoothly is where full boost is.

Oh, and who uses 2000rpm to race..??

+1 for superchargers though, most people who use turbos go with "the bigger the better" as superchargers don't leave much room for error, the are all pretty inefficient in the roots camp. Centrifugals are just too much of a PITA to bother with NTM the cost.