Boost is a measurement of restriction. 600hp requires a certain amount of airflow regardless of engine size. To push that much air through a 2 liter engine might take 25psi. To push that much air through a 6 liter engine might take 8psi. Same hp, same amount of air, less restriction. Drag radial and outlaw 10.5 guys are pushing 35-40psi through 440-454ci lsx small blocks with heads that flow almost 500cfm per intake port. That srt4 in the other thread made 500whp at 25psi. They are making 2500whp or more. Boost is just a number.


That said, atmospheric pressure is 14.7psi or 1 bar. Within reason (intake air temp etc) you can deduce that an engine running 15psi of boost is doubling the amount of air going through the engine, roughly doubling the power it made N/A. So a 400hp motor now makes 800. At 30psi or 2 bar it would be making triple. So on and so on.

thanks for the reminder fmx i could not solve this for the life of me for the last 2 days lol

What is more costly a t/c or s/c setup?

Would a s/c setup affect VTEC? (i-vtec)


What would last longer a s/c or t/c setup?

What would have to be upgraded to support a s/c and t/c setup? (I keep hearing that I would need forged internals but what does that mean?)

Thank you if you decide to answer my noob questions.

Anyone read much about turbocharging a SBC using a blow through carb? I know FI is better for turbos, but I love my carburetors .

what kind of car are you planing on doing would help some.

I could definitely google this, but might as well since this thread is up. What is the difference between the 3 types of superchargers? roots, centrifugal, twin screw. And which one is better/more efficient

root style makes peak power while twin screw makes lots of tq and power all the way though the power band

definalty twin screw if its going on a mod motor

This post was edited by justin_618 on Jul 25 2013 10:10pm

Normally a sc setup is cheaper . You just need the blower and a new belt. Turbo you need new exhaust manifolds and pies to re route everything. If you want to be safe a intercooler also.

Forged internals means hardened pistons,crank new stronger rings. All the internal parts of the engine. You need the harder pieces because the factory ones were not designed for boost and will give out easy. Forged internals is like piece of mind. You don't want to spend 4k on a induction setup only to loose it all to a bad piston

Roots has a pretty flat torque band and has great drivability, but you can only run so small of a pulley before it becomes inefficient and creates lots of heat. Centrifugal tends to be peaky but there's no efficiency cap as long as you don't get belt slippage. It's essentially a big turbo turned by gears/pulley instead of exhaust gases.

Turbo will make more power in the long run, but a sc is cheaper and way more reliable, better for a DD imo. I-VTEC will not really be affected with forced induction, still works the same way essentially. I'm guessing a civic or Rsx? If that's the case comptech makes an excellent kit for those applications