Physics for intake and exhaust
Thread Starter
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Physics for intake and exhaust
Was wonder what the diff is between the two and if using an x-pipe type configutation on the intake side would yeild the same results. I am assuming not but wanted input from the best knowledge base I know. Well now that I have asked myself I'll let you guys try now. :p:
BTW This is sparked by the tpi design on the long tube runners, wondering if an x design would do anything.
BTW This is sparked by the tpi design on the long tube runners, wondering if an x design would do anything.
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
Re: Physics for intake and exhaust (Fevre)
David Vizard has, in a couple of his books, gone into the pros and cons of various intake manifold designs. Reading his stuff is very informative.....
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
Re: Physics for intake and exhaust (Fevre)
I believe that the intake is moving slower than the exhaust. The theory is that the exhaust is using the x-pipe by using each pipe to help pull the exhaust faster from the other pipe and vice-versa. On the intake, you are "pushing" air into the engine and the only way to duplicate that on the intake is either "ram air", turbo, or supercharger.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Re: Physics for intake and exhaust (Fevre)
Independent runners on the intake provide the most cylinder filling and least charge dilution. This is how engine builders/tuners can increase volumeteric efficency greater than 1. Independent runners are what make weber carbs so effective. Also allows greater cam overlap/bigger cam with smother idle and better fuel economy. Detroit used for barrels due to cost and seviceability/maintenance.
Exhaust crossovers/X-pipes balance the exhaust pressure and develops better exhaust savaging – to empty the cylinders. There is even more power to develop by matching the idividual cylinders – even accross banks/sides – to maximize savaging.
Most bookstores and usually most libaries will have something to read on this. ;)
Exhaust crossovers/X-pipes balance the exhaust pressure and develops better exhaust savaging – to empty the cylinders. There is even more power to develop by matching the idividual cylinders – even accross banks/sides – to maximize savaging.
Most bookstores and usually most libaries will have something to read on this. ;)
Drifting
Joined: Feb 2002
Posts: 1,906
Likes: 0
From: Berlin
Re: Physics for intake and exhaust (Guru_4_hire)
Arent webers peaky(I know they are pricey)
Using these effects to their maximum isn't something I'd worry about though. It takes serious engineering to get it right. Only OEMs or serious racers have the budget for it. Throwing parts at it will gain you a little after a lot of trial and error tuning, but I'm not sure your gains would even be worth all that work.
C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
Likes: 2
From: Twin Cities Minnesota
Re: Physics for intake and exhaust (aharte)
A good set (the right size and length) of headers will make 100x more difference than a good intake.
assuming the intake is adequate and the rest of the exhaust is ok...
assuming the intake is adequate and the rest of the exhaust is ok...
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
