SurWicked

i have a carbed 10.8:1 351w with afr 185 heads, victor jr intake, 4150 hp 750mc sec carb.

i am thinking about changing out the pistons and cam to make it a 8.5-9:1 motor and putting a paxton 10psi blowthrough supercharger on it. do you think the gains would be worth my while? im not sure how much hp id gainwith a lower compression engine with a blower.

i only est. about a 50hp gain if that, but i could be wrong? is there anyone out there running a similer setup? btw this needs to stay a 93 pump gas motor.

AdderMk2

turbo > supercharger.... especially if you gonna go through all the trouble of replacing the internals to do so!

SurWicked

i already have weisco forged racing pistons and eagle h-beam rods. my bottom end less then 200miles on it and it is 100% right now. the question is weather or not id gain enough power to make it worth while if i add a supercharger.

lets say i push 350 to the wheels right now at 10.8:1. a 9.0:1 mite make ~300? if i add the supercharger will i at least make 400+? the cost or a turbo or supercharger is ~$5,500 top to bottom install price. if im only going to pick up 10hp id rather not waist the money and ill just add juice. but i want the power to be there all the time, and i mite still add juice later.

so where do you guys think ill land at hp wise with a 10psi supercharger?

SurWicked

what is confusing me is a supercharger or turbo in the long run just adds compression to your engine. if you have to take out compression just to add it back in with a blower/turbo, will i pick up any power.

MadMan@TheWheel

If you drop compression a little to add blower or turbo, you will pick up HP instead of picking up the peices of your crank.

86onboost

Explain??

MadMan@TheWheel

Ideal compression for S/C or Turbos is around 9:1 or as high as 9:5:1. There are some that will not run higher than 8:5:1, the addition of boost to the cylinders can move the flame center and cause detonation. Another thing that causes detonation is addition of heat to the cylinder causing pre-combustion. Naturally S/C and Turbo's add a lot of heat to the cylinders, even with pre-cooling charge air. So high compression is dangerous at best to the life of your components. To put it simple.

SurWicked

??? wtf did that come from. read the first post. i will drop my compression to add boost, if i can make more power then i have now. the question was weather or not i would make more power.

MadMan@TheWheel

Yes you will add more power. You don't need to get nasty, I was giving you information. Drop compression to add boost and you will see much more gain with S/C or turbo than with a high compression naturally aspirated motor.

SurWicked

not tryin to get nasty, just figured you overlooked my first post with the comment you made. thank you for the advice.