LT4 vs Supercharger vs Turbo

[ViperJ]

Well what are you guys opions on the above. I am looking for input from all of you guys, opions from people that own them good/bad.

I am looking for
-Cheapest (LT4 so far)
-Easiest to Install
-Best Power gains
-Overall opions

Basically I am eventually trying to get a 10.5 sec street car so give me your feedback

[poormillionaire2]

Going all-motor or forced induction both have their advantages and disadvantages.
As far as the LT4 package (assuming from GM; heads, cam, rockers..etc) it won't net you a 10 sec. street car. If you're going with a H/C package, you'll need a bigger set of heads and a bigger cam. You might as well spend the extra dough on something with a little more output than the LT4.
As far as the turbo vs blower debate, ultimately boost is boost. A stock LT1 can only handle 6 psi (8 psi intercooled, I believe), so anything more than that and you'll have to tear into the block and forge the internals.
Blowers are easier to install but are belt-driven and are limited to pulley sizes in relation to boost. Turbos are a little more complicated but theoretically can provide infinite boost. A twin turbo setup would probably be a little easier so you can run a turbo off each manifold, instead of crossing pipes to a single turbo. But they generate a lot of heat and take up a lot of underhood space. Unless you go with an STS rear-mount turbo kit. Which also have their proclaimed advantages/disadvantages, but I won't go there.

None are going to be cheap, and remember, boost places extra wear on the engine.
I think you should build a 383 stroker and get a nasty cam for that, instead of boost, but that's just me. Nothin like a 10 sec N/A street car.

[Dyno247365]

LT4? You might as well get an LS1. No way, build up the LT1. They handle turbo really well, but I was thinking nitrous...but I'm being me right now.

[Nate355RS]

10.5 is pretty stout, I think getting into those kind of numbers is going to be really hard on the stock internals. I vote for a N/A 396 stroker with a forged rotating assembly, worked over AFR 210 heads, and a cam with a duration around 250-260. Of course it would take some serious jack to put it together but a 10 sec car isn't going to be cheap anyway you look at it.

[Dyno247365]

Originally Posted by Nate355RS

10.5 is pretty stout, I think getting into those kind of numbers is going to be really hard on the stock internals. I vote for a N/A 396 stroker with a forged rotating assembly, worked over AFR 210 heads, and a cam with a duration around 250-260. Of course it would take some serious jack to put it together but a 10 sec car isn't going to be cheap anyway you look at it.

Usually how much power do you need for 10 seconds? I never actually figured it out.

[stone_mound_camaro]

Originally Posted by Dyno247365

Usually how much power do you need for 10 seconds? I never actually figured it out.

800ish

[FormulaLT1]

Boost is always a option but if you are going to start on your way to 10's. Build/stroke the motor to start with. It will give you a huge step farther and allow you to beef up the internals to possibly handle boost down the road. Not to mention that the amount of air pressure to create each PSI on a 383 + cubic inch engine is greater than it is on a 350. So a supercharger/turbo that lets say makes 6 PSI on a 350 may only make 4PSI on a 383 because of its more efficient allowance of digesting CFM.

This is good cause it allows you to run a more efficient turbo/blower while still meeting the possible lower pressure ratios of dealing with a higher compression engine and lets not forget the most important thing about boost. It is a multiplication of your base power. This means more of a base mean more of a improvement.

[FormulaLT1]

Originally Posted by stone_mound_camaro

800ish

Damn, you must be calculating in for the worst driver ever . Depending on many factors but 600 flywheel horsepower 3500lb car is capable of making it into the 10's. A 800 horse flywheel horsepower car weighing the same could possibly just brush the 9's.

[ViperJ]

Well so far so good, this is the kind of stuff I was looking for

[Nate355RS]

You can get into the 10s with a 350 ci but it's going to have to be a pretty aggressive setup. A 10 sec 350 is not going to be as near as streetable as a 10 sec 383-396. Of course every setup is different and a tame-ish 350 can go 10s but nitrous but on average more cubes = easier to run on street and make more power.

[1986Z28]

Originally Posted by FormulaLT1

Damn, you must be calculating in for the worst driver ever . Depending on many factors but 600 flywheel horsepower 3500lb car is capable of making it into the 10's. A 800 horse flywheel horsepower car weighing the same could possibly just brush the 9's.

it would be close, id say 650 - 700 would put you mid 10's, but running mid 10's there other stuff to look at, ex: SFC's, cage, trans and rearend swap(12-bolt or 9") running mid 10's isnt hard but you also have to look at the rest of the car if you dont want a pretzel or a lot of vbroken parts!

[poormillionaire2]

You also need to hook up well. Spinning is only good for burnouts.
But a stroker is a solid place to start and build a good platform. Boost or juice can always be added later on down the road.

[stone_mound_camaro]

Originally Posted by FormulaLT1

Damn, you must be calculating in for the worst driver ever . Depending on many factors but 600 flywheel horsepower 3500lb car is capable of making it into the 10's. A 800 horse flywheel horsepower car weighing the same could possibly just brush the 9's.

see...whenever someone says a number like 10..i think low 10...like 9-10 not high 10, like 10-11...my bad

[FormulaLT1]

LOL, I am the opposite. If I run a 10.99999999999999999999999 you will here me say my car is a 10 second car but technically I guess it would be.

[viperh]

Originally Posted by FormulaLT1

LOL, I am the opposite. If I run a 10.99999999999999999999999 you will here me say my car is a 10 second car but technically I guess it would be.

I agree with you.. You really need to weigh your options. Supercharger is usually cheaper than a turbo setup.. However Turbos use wasted energy where as superchargers use some of the engine's power to make power. Turbos In my opinion are more streetable that supercharger. (That's my opinion others will have the same or diffrent opinions). Regardless of the fact you need to plan if your going NA or forced induced now before you start buying parts. Come up with a plan on what you want before you start implementing it otherwise you'll waste a shit ton of money.

-Nate-