Predator Help
Thread Starter
Racer
Joined: May 2001
Posts: 430
Likes: 36
St. Jude Donor '09
Predator Help
I am going to have my car dyno'ed very soon and want to know what I should be looking at while dynoing the car? How will I know if its running rich or lean ? Thanks for any help you can give. :cheers:
Burning Brakes
Joined: Jul 1999
Posts: 1,141
Likes: 0
From: Mobile AL
Re: Predator Help (redrocketship)
On WOT you will want your O2 voltages between .880 and .890, with up to .900 okay. You will want your KR at or nearest to 0 as possible (try for this), and your LTFT at 0. All this is under WOT (wide open throttle), btw.
Let me know if I can be of any further assistance.
Sincerely...
Let me know if I can be of any further assistance.
Sincerely...
Burning Brakes
Joined: Jul 1999
Posts: 1,141
Likes: 0
From: Mobile AL
Re: Predator Help (redrocketship)
Specs ?? You mean my mods ? Thanks for your help.
Sincerely...
Thread Starter
Racer
Joined: May 2001
Posts: 430
Likes: 36
St. Jude Donor '09
Re: Predator Help (RWTD)
Oh, sorry I didn't understand. I havent looked at them yet, its too hard while driving. I going to have a passenger look at them this weekend. I'll let you know. Thanks again.
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Le Mans Master
Joined: Jun 2001
Posts: 7,331
Likes: 518
From: Admit Nothing, Deny Everything, Make Counter Accusations.
Re: Predator Help
On WOT you will want your O2 voltages between .880 and .890, with up to .900 okay.
Thread Starter
Racer
Joined: May 2001
Posts: 430
Likes: 36
St. Jude Donor '09
Re: Predator Help (rbartick)
On WOT you will want your O2 voltages between .880 and .890, with up to .900 okay.
You cannot tune WOT with the stock O2 sensors. In addition, the WOT ratio will vary over the RPM range. Shooting for one value may not provide the best results.
You cannot tune WOT with the stock O2 sensors. In addition, the WOT ratio will vary over the RPM range. Shooting for one value may not provide the best results.
Then how do I go about this ?
Le Mans Master
Joined: Jun 2001
Posts: 7,331
Likes: 518
From: Admit Nothing, Deny Everything, Make Counter Accusations.
Re: Predator Help (redrocketship)
The PCM will always maintain 14.7:1 while cruising closed loop on the street. This is done via STFT & LTFT correction. If you want the initial closed loop fuel metering more accurate (with less fuel trim correction) then you take readings & make changes on the street.
The WOT A/F ratio should be tuned on a wideband dyno.
The WOT A/F ratio should be tuned on a wideband dyno.