How to make a 2 BAR MAP work with a GM 8D #1227727 ECM?
12-14-2011, 04:24 PM
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How to make a 2 BAR MAP work with a GM 8D #1227727 ECM?
Hi Folks,
First post. Hope I posted this is the right forum. I tried searching and goggling for help on this but my extensive efforts were not fruitful.
I have a L98 350 TPI from a 90 Vette running the stock vette 8D ECM with a Procharger 600b. I am a novice tuner so please take that into consideration when you explain this to me.
I was advised that I could get a better tune if I used a 2 BAR MAP instead of the stock 1 BAR MAP. I purchased a 2 BAR MAP for a 87 Buick GNX, and cut the key ways so I could plug the MAP into the stock connector.
Some of the posts I found said others have switched to 2 BAR maps in "similar" GM ECM's by just halving the values VE to MAP table. I tried cutting my current VE to MAP table by 1/2 but the car will not start or run when I install the 2 BAR MAP. So I assume there are more changes needed. It kind of shuddered. Reinstalling the stock 1 bar MAP and the car runs good.
I was hoping someone could guide me on how to get the #1227727 ECM to work with a 2 BAR MAP. What values need to be tweaked?
Or is it impossible?
Thank you in advance.
First post. Hope I posted this is the right forum. I tried searching and goggling for help on this but my extensive efforts were not fruitful.
I have a L98 350 TPI from a 90 Vette running the stock vette 8D ECM with a Procharger 600b. I am a novice tuner so please take that into consideration when you explain this to me.
I was advised that I could get a better tune if I used a 2 BAR MAP instead of the stock 1 BAR MAP. I purchased a 2 BAR MAP for a 87 Buick GNX, and cut the key ways so I could plug the MAP into the stock connector.
Some of the posts I found said others have switched to 2 BAR maps in "similar" GM ECM's by just halving the values VE to MAP table. I tried cutting my current VE to MAP table by 1/2 but the car will not start or run when I install the 2 BAR MAP. So I assume there are more changes needed. It kind of shuddered. Reinstalling the stock 1 bar MAP and the car runs good.
I was hoping someone could guide me on how to get the #1227727 ECM to work with a 2 BAR MAP. What values need to be tweaked?
Or is it impossible?
Thank you in advance.
12-14-2011, 04:38 PM
#2
Re: How to make a 2 BAR MAP work with a GM 8D #1227727 ECM?
you can run a code$58 or $59 www.code59.org
Last edited by Tuned Performance; 12-14-2011 at 11:08 PM.
12-14-2011, 06:40 PM
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Re: How to make a 2 BAR MAP work with a GM 8D #1227727 ECM?
you can run a code $59 www.code59.org
5) '90 - '91 Corvette owners: the EBL P4 ECM will not communicate with the CIM. If there is enough interest this functionality may be added in the future.
Last edited by Flame Red; 12-14-2011 at 07:28 PM.
12-14-2011, 10:36 PM
#6
Re: How to make a 2 BAR MAP work with a GM 8D #1227727 ECM?
You will have the same problem trying to use $58 or $59. There is nothing in that code to connect with the CCM/CIM/BCM/Wheteverit'scalled.
I replied to this on Tunerpro.net as well, but with more info.
Did you check your spam folder? Sometimes the e-mails from the site get treated like spam.
I replied to this on Tunerpro.net as well, but with more info.
Did you check your spam folder? Sometimes the e-mails from the site get treated like spam.
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