All the exhaust manifold flow numbers inside:
04-01-2008, 11:41 PM
#12
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well audi/most manifold builders (Wagner has software to simulate) flow with a jig not a single
runner test.
To flow a manifold properly you have to build a head jig and run the air through the cylinder head as the cycle of a motor is going because at no time is there one pulse in any manifold down a single runner on a multi cylinder engine.
Wagner has the nice flow/pulse simulators which means it was taken into account and has a really nice collector area so the pulses from the different runners dont create turbulence in the collector area. You can tell its well engineered from the thermal dynamic pics he had up a while back.
Wagner made this 034 is the distributor hence why i would buy it.
To flow a manifold properly you have to build a head jig and run the air through the cylinder head as the cycle of a motor is going because at no time is there one pulse in any manifold down a single runner on a multi cylinder engine.
Wagner has the nice flow/pulse simulators which means it was taken into account and has a really nice collector area so the pulses from the different runners dont create turbulence in the collector area. You can tell its well engineered from the thermal dynamic pics he had up a while back.
Wagner made this 034 is the distributor hence why i would buy it.
04-02-2008, 05:24 AM
#14
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Not at all
I'm saying that the exhaust flow of a running engine is a lot more complicated than how much CFM wil flow when the other runners are blocked.
The pulses collide inside the manifold, the effect of this is determined by the length of the runners and the collector design.
The exhaust gasses change velocity depending on the diameter of the tubing, which effects when pulses will collide, where, and at what rpm.
The big X factor is EGTs. How hot it gets, and where.
The pulses collide inside the manifold, the effect of this is determined by the length of the runners and the collector design.
The exhaust gasses change velocity depending on the diameter of the tubing, which effects when pulses will collide, where, and at what rpm.
The big X factor is EGTs. How hot it gets, and where.
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