Next thing you should get is a wideband in your car... That will tell you where your A/F is... Your too rich or too lean, that will leaves power on the table and could possibly damage things.Originally Posted by projectblackbird
Next thing you should get is a wideband in your car... That will tell you where your A/F is... Your too rich or too lean, that will leaves power on the table and could possibly damage things.
1999 Trans Am. 10.71 @ 126 - stock bottom end-
its in the making, but i really wanna upgrade my pcm to a 99 like yours! i was told that i could get better tuning out of it
Yep do the 99-02 PCM conversion then run COS 5 for when you go to spray. Flip a switch and the PCM instantly pulls however much timing you setup so you can spray all day long then go back instantly to full power N/A.
~Erik~
2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.
You care to go into more detail about COS 5.
1999 Trans Am. 10.71 @ 126 - stock bottom end-
COS5 has nitrous tables that are activated by earthing a pin in the PCM. Once the pin is earthed timing can be pulled from one table & fuel added from another if you are running a dry shot. Check out A0015 & A0016 in the attached tune file.
This pin can also be set up for valet mode.
IIRC the A0015 VE multiplier table will not work if the maf is enabled.(SD mode only)
The Tremor at AIR
So you have A0015 that can richen up the AF by changing the VE Tables and A0016 can pull timing.. Pretty nice...
Is there a limit to how much timing can be pulled and how much you can adjust your VE Table??
That would be pretty sweet because there has been a countless number of times where I was either a tad too rich or a tad too lean and did not have the proper size jets to accomidate for it. So, this would come in handy for fine tuning. And since my motor crapped out on me a few weeks ago and I am going FI now, it looks like I should upgrade too.
What all is needed to do this?
Last edited by waterbug1999; September 1st, 2009 at 11:47 AM.
1999 Trans Am. 10.71 @ 126 - stock bottom end-
I believe the VE multiplier has been upgraded to run at least a 300 shot. I know a few cars in Adelaide are running a 250 dry shot using only these tables.
Check out here http://forum.efilive.com/showthread.php?t=2599
technically if you have a wet kit and use that table to mostly add fuel its a dry shot I suppose..
Just make sure your injectors are up to par if you dont use your jets to get you close.
1999 Trans Am. 10.71 @ 126 - stock bottom end-
hey, i did a little data logging today with your touch up! it was pulling 4degrees out between 4 and 5 grand
98's tend to get high KR.... Put the old tune back in and see if you still get knock or throw some race gas in and see.
1999 Trans Am. 10.71 @ 126 - stock bottom end-
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