Air fuel ratio question

Ed Wright · 07-12-2017, 10:16 PM

If you use a FAST XFI system, you can use a distributor with a cam position sensor & put it in Sequential mode, and adjust each cylinder's air/fuel & timing. There is some power there. Could be suprising the difference in air/fuel ratio you see between cylinders. Change intake manifolds, you get to do it all over again. With my Hogan, I had less variation than with the single plane & elbow. More difference between the 2 tune ups than just that.
And, I saw VERY little difference between my air/fuel ratio in the primary tube O2s, and in the collectors. I must be doing something wrong. LOL

07-12-2017, 10:16 PM	#9
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Air fuel ratio question If you use a FAST XFI system, you can use a distributor with a cam position sensor & put it in Sequential mode, and adjust each cylinder's air/fuel & timing. There is some power there. Could be suprising the difference in air/fuel ratio you see between cylinders. Change intake manifolds, you get to do it all over again. With my Hogan, I had less variation than with the single plane & elbow. More difference between the 2 tune ups than just that. And, I saw VERY little difference between my air/fuel ratio in the primary tube O2s, and in the collectors. I must be doing something wrong. LOL __________________ Ed Wright 4156 SS/JA