O2 readings at idle |
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O2 readings at idle |
yeahmag |
Nov 29 2010, 08:27 PM
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#1
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Advanced Member Group: Members Posts: 2,422 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California |
Just an idiot check here... I got Evan's old header on the car and all fixed up. It now clears my tuna can, has leak free collector/slip joints, mounts to the stock trans location, and has an O2 bung welded just past the collector.
Now my question is simple. I wanted to idiot check that I should be gunning for 12.5:1 or so at all points; idle, transition, at WOT. I leaned out on idle to the point that I think I'll need a 65 idle jet on my 40 Dell's (34mm vent). I took an extra full turn on the idle volume screws to get it around 13.5:1. I must say though I picked up more than a few HP with it. It's a 4-1 in somewhat of a KH design with a Phase9 style muffler with an extra 360 degree SS loop between the collector and muffler to add some length to the secondaries. Pictures coming... |
Mark Henry |
Dec 1 2010, 02:50 PM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
You need to open up the main jets.
WOT and going up a hill are a full load and you should be 12.5 to 13.5:1 Same for going highway speed on level ground, you might be a hair higher say at the 13.5:1 mark. You notice it goes crazy downhill and leans way out, that's normal and OK as there is no load. |
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