ECM upgrade?
Thread Starter
Pro
Joined: Jul 2002
Posts: 524
Likes: 1
From: Port Charlotte Fl
ECM upgrade?
am planning an engine upgrade (383/406) and was curious what anyone thinks about upgrading the ECM as well. How much trouble is it to replace the OBDI with an OBDII computer, my reasons are it would seem the OBDII computer is easier to program ( changing parameters on the fly so to speak) with out having to burn a new PROM based on new tuning parameters etc...
Any thoughts anyone?
BTW this would be on an 87 coupe with 700r4 trans ( would also allow me to change to the 4L60E trans to change shift points etc as well)
Any thoughts anyone?
BTW this would be on an 87 coupe with 700r4 trans ( would also allow me to change to the 4L60E trans to change shift points etc as well)
Advanced
Joined: Nov 2004
Posts: 79
Likes: 0
From: Richmond VA
I don't think that it's worth it. It's my understanding that the systems are quite different. There are some sensor differences (i'll have to get back with you about what they are) OBDII is much more sensitive to changes to your car. Any mods to the engine could be interpreted by the computer as a malfunction and force a check engine light (and therefore a default program for the motor that is designed for emissions complaince and protecting the motor). It is very easy to reprogram OBDII ECMs, but you'll have to do it more often if you modify your car often.
Another issue is that your car is a distributor car, the OBDII cars all have the Opti-spark system.
Just my opinion. It and 50 cents still won't get you a cup of coffee at Starbucks.
Another issue is that your car is a distributor car, the OBDII cars all have the Opti-spark system.
Just my opinion. It and 50 cents still won't get you a cup of coffee at Starbucks.
Team Owner
Joined: Sep 2001
Posts: 62,067
Likes: 1,723
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Dont even think about changing to OBDII, thats just crazy. If you want a computer upgrade, look at Accel DFI 7, not an OBDII computer system.
Burning Brakes
Joined: Apr 2002
Posts: 1,126
Likes: 0
From: Cleveland OH
Originally Posted by LarryK 87
BTW this would be on an 87 coupe with 700r4 trans ( would also allow me to change to the 4L60E trans to change shift points etc as well)
Ron
Le Mans Master
Joined: Jun 2002
Posts: 6,097
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From: High Plains Drifter Fayetteville, AR
http://www.moates.net/product_info.p...products_id=55
No need for OBDII, just get the product in the link above and you can do real time on the fly tuning to OBDI systems.
No need for OBDII, just get the product in the link above and you can do real time on the fly tuning to OBDI systems.
