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Kevin M · 12-15-03, 07:29 PM

The “Bundle of Snakes” exhaust is not a 4 into 2 into 1 system. It is a 4 into 1 system taking advantage of the scavenging effect of connecting cylinders with equal pulse spacing in the same collector.

The equation for a 4 – 2 – 1 system would not have any applicability to what is used on the GT40.

If you have the equation for a 4 into 1 system it would be interesting to compare that, although using the equally spaced pulse type system has large enough advantages that you are probably ahead of the game by using pipes a couple of inches longer than optimum if you need to do that to get them to reach.

12-15-03, 07:29 PM	#2 (permalink)
Kevin M kmcgowen 2 Tenths Join Date: Nov 2003 Posts: 246 Rep Power: 7	Re: Primary pipe length formula The “Bundle of Snakes” exhaust is not a 4 into 2 into 1 system. It is a 4 into 1 system taking advantage of the scavenging effect of connecting cylinders with equal pulse spacing in the same collector. The equation for a 4 – 2 – 1 system would not have any applicability to what is used on the GT40. If you have the equation for a 4 into 1 system it would be interesting to compare that, although using the equally spaced pulse type system has large enough advantages that you are probably ahead of the game by using pipes a couple of inches longer than optimum if you need to do that to get them to reach.