Chip burners needed
Thread Starter
Advanced
Joined: Jul 2001
Posts: 73
Likes: 0
From: san berdo CA
I have hi performance motor and having troble getting the engine rich enyought.Diacom WOT 820.mv.
mini rim with30# injector.
AFR cnc ported to 239 cc intake.
compression 11.3 to 1
comp cam 240 in 250 exh @.050
JE pistions with 6" rods.
1 and 3/4 long tube headers.
Email @ rightonjoe@earthlink.net
mini rim with30# injector.
AFR cnc ported to 239 cc intake.
compression 11.3 to 1
comp cam 240 in 250 exh @.050
JE pistions with 6" rods.
1 and 3/4 long tube headers.
Email @ rightonjoe@earthlink.net
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
How rich do you want it? If you are using the stock O2 sensor to get these readings, they can tell a lot during part throttle, but then when the engine goes into enrichment, the 820mv really doesn't mean much at all. The best way to read it is on a Dyno with a wide-ratio O2 sensor.
Also, the chips are all different based on MAF or speed density. 85 has very little that can be changed, 86-89 is better than 85 and totally different than 90-91. What year computer is it running?
Also, the chips are all different based on MAF or speed density. 85 has very little that can be changed, 86-89 is better than 85 and totally different than 90-91. What year computer is it running?
Melting Slicks
Joined: May 1999
Posts: 2,037
Likes: 0
From: Sarasota FL
DIY. Or spend $500 to have it done. Tuning it over the phone will never produce great results, unless you get lucky. You need someone who'll spend time reaing a scanner in different situations.
Tuning with the stock O2 is a bad idea.
Tuning with the stock O2 is a bad idea.
Racer
Joined: Jul 2001
Posts: 399
Likes: 1
From: Toronto Ontario
Have you looked at what your fuel pressure is at WOT? Do you have a hi-perf pump? If everything checks out with the fuel pressure, there's no reason you can't dial in more fuel in the ECM's EPROM. Try simply bumping up the fuel pressure using the regulator first.
I shoot for an O2 reading of around 870-890mV at WOT. This gives me the most HP with my 383 setup.
I shoot for an O2 reading of around 870-890mV at WOT. This gives me the most HP with my 383 setup.
