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Ed Wright · 07-26-2015, 10:54 PM

The merge collectors needed a different fuel curve to get as good as I could get them, but still down from straight 3 1/2" collectors. My friend Pete Peery found no gains, last I heard, from merge collectors on his LT1 SS GT car. Some engine love them. I even pulled some exhaust duration trying to make them work. I only run 4 degrees split with the straight collectors.

07-26-2015, 10:54 PM	#6
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Have Stepped Headers Been Proven Out ? The merge collectors needed a different fuel curve to get as good as I could get them, but still down from straight 3 1/2" collectors. My friend Pete Peery found no gains, last I heard, from merge collectors on his LT1 SS GT car. Some engine love them. I even pulled some exhaust duration trying to make them work. I only run 4 degrees split with the straight collectors. __________________ Ed Wright 4156 SS/JA