I think this read refers more to turbo set-ups though.
Don't know how you worked that out when they talk about headers - turbos don't have headers!
Good read - makes a lot of sense too. So now can anyone explain why smaller diameter primaries give better low down torque than larger diameter primaries? No? Me too!
__________________
__________________________
AU1 XR8 Auto147.9 rwkw (approx 215 fwkw)
AU2 Wagon HAD Auto
17s, Pacemakers, 3" Intake & Pod filter (The Family Hack)
__________________
Rosewood EAII Fairmont 02/90. MPFI 3.9L (formerly CFI), 4spd BTR Auto. Skyline geared 3.45g open center 28 spline 4 pinion differential & axles. 2 1/2" Cat Back Exhaust. King Super Low Springs. Sound: Equalization and amplification by Clarion; Head unit by Sony, Front, Rears and Sub by Pioneer. Planned mods - t5, Extractors, Painting Grey Strips and new front and rear bar.
What a load of shite. As if my car I6 needs a 3 inch system.
Like I said, I think this stuff is refering to turbo systems as far as pipe sizes go.
The suggested sizes for naturally aspirated I6 or V8 would be too big.
What a load of shite. As if my car I6 needs a 3 inch system.
"Unfortunately, we know of no accurate way to calculate optimal exhaust pipe diameter. This is mainly due to the random nature of an exhaust system -- things like bends or kinks in the piping, temperature fluctuations, differences in muffler design, and the lot, make selecting a pipe diameter little more than a guessing game."
Quote:
Originally Posted by JC
Good read - makes a lot of sense too. So now can anyone explain why smaller diameter primaries give better low down torque than larger diameter primaries? No? Me too!
According to the article. A pipe too large will allow the exhuast gas to cool down too quick and loose velocity. At low RPMs where the gas is travelling slower, this could have a negative impact such as loss of torque. Smaller pipe could maintain exhaust gas velocity at lower RPM hence produce better "power". However at high RPMs the gas is obviously travelling much faster hence larger pipes are more beneficial?
At least that is how I have interpreted it from this article.
__________________ People say money can't buy you happiness.... I say they just don't know where to shop.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Chillin, Pimpin, Lo Ridin.
Oversteer Scares The Passengers , Understeer Scares The Driver.......
Let The Mods Begin!!!!!!!!
Linear Mode
