My freinds GT42R supra runs 24PSI on low boost, and 45 on high


Anyways 24psi can be done on pump gas with decent sized turbos, Ive run my lil turbo on 24psi and I dont think thats high or anything CRAZY OMG.


People run that much on a stock 14B turbo trying to max it out if not more, its the size of the turbo not the PSI.

 

How come V8s can run 12PSI and make huge power? You guy run a make bigger turbo and dont need alot of psi. On a stock bottum end setup im talking about not a built motor.

You get the idea, whatever im taking off my flame suit and im outta this thread.

 

Wow, I post how I got rocked by an EVO and this whole thing has evolved into something else lol. No worries, I'm still wondering if the guy that owned me will find this on the site and post up.

 

Airflow is important, not PSI. V8s naturally flow more air (bigger air pump) and as such do not require the air to be as pressurized as a 4 banger does to make the power.

 

Not to mention that 14.7 psi (at sea level) would affectively double the engine's displacement (all else equal).

A 2.5 Liter (4 cylinder) X 2 = 5.0L
A 5.0 Liter (8 cylinder) X 2 = 10.0L

The difference gets bigger as the psi increases... the V8s start with a bigger advantage, and boost will increase the difference exponentially, not linearly.

 

Conclusion: V8 > 4 cylinder

 

Conclusion: $$$ > *

 

Money is better than...asterisk?? Umm okay...

 

An asterisk is short for "everything"

In other words, money is what dictates how fast you can go.

 

Okay...but with equal amounts of money, the V8 will still always be faster

 

Not necessarily.

 

The GRM $2005 Challenge is the best example I know of how the theory can get tossed right out the window in the real world.

 

In terms of fast, you can never use absolutes. Nothing is ever a given. The Arial Atom is one fast ******* import, and it'll beat just about anyone here on a road course. Not to mention its cheap as hell. There are many other examples.

However, it is safe to say that USUALLY (not always) more money on a V8 means it'll be faster.

 

nice death dude i actaully like evo's.........but i think its about time you modded your nearly stock car

 

its always easy to throw a bunch of money at a car, but that doesnt mean you will always get results, nothing beats good old knowledge and theres always ls1tech and ebay to save you some money just do your research first, if planned out correctly you can be ******* fast withouth having to sell your house

 

That's a pet peeve of mine. It's 24psi NOT 24lbs. One is a unit of pressure, the other is not. It's one thing to shorten it in speech but another in writing.


22-24psi is low boost on my car too. I run that on pump gas.

 

My car ran 19 stock, and I gave it a bump to 23. I run this on pump gas. High boost these days is pretty much anything 30-40psi...

 

You guys are way off the scale. 24PSI of boost is not, by any means, low boost

Low boost is like what stock Mustang Cobras put out, about 12PSI. Low boost is like what you would get with a turbo kit for an N/A car. I don't consider anything above 14PSI "low boost", thats ridiculous.

Pushing 30-40PSI is an awesome way to destroy your engine. Pushing that kind of boost on anything but a race car on racing fuel is just plain stupid. I can't see something like an Evo or STi lasting more than 50K miles with that kind of boost being fed into it.

 

There are so many fallacies in this post its not funny.

I can run 24 psi on 91 octane gas without stressing my car at all. And anyone that plans on making 600+ HP without opening the hood of their car and replacing parts is an idiot, regardless of import or domestic.

You dont build race motors to last 50k. You build them to last the 1/4 mile, and if they last 50k thats just a benefit.

 

on a v-8 it is.........