what do i have to do to change my pcm from 98 to 99 or newer
11-02-2011, 03:42 PM
#1
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what do i have to do to change my pcm from 98 to 99 or newer i have a 88 trans am with a ls1 swap. it has a modified 98 harness and computer. will the newer computers 99-02 bolt directly in place of my 98 computer. are there any benefits of installing a newer year computer? i wanted to buy a diablosport predator, but it only say it will work with 99-02. has any one used a predator on a 98 computer? any help grreately appreciated
11-05-2011, 10:31 AM
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It took me about 4 hours to do it. It took me 2 hours to repin it back to the 98. If nobody posts the link, I'll find it later. Someone has created a perfect step by step instruction on how to do it.
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11-13-2011, 08:19 AM
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what is the diffence beween 98 -02?as long as u dyno the car is should come close to all the same right?i have a 98 ws6 6speed and im leaning to a dyno but if i can get more power out of a pcm swap like hes doing then ill do that to.or do we just repin the 98 pcm?
11-13-2011, 05:52 PM
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I was looking into doing this for my 98 Z because I wanted a diablosport tuner. My dad has a 99 T/A he got the diablo and he claims it gave him 15hp at least. I drove his car and it felt no different then my camaro. I think he wasted 280dollars and its in his head. I don't really believe in hand held tuners. I rather have mine dyno tuned. And that's what I'm gonna do. I think it would be cheaper then buying a new pcm and the diablo then it would to just take it to a performance shop for a nice tune. That's just me though 
11-13-2011, 11:12 PM
#12
Are you saying that the 98' PCM'sprimary and secondary VE tables are easy to tune as a 411 PCM? I have no experience with tuning this is just what i have read and been told.
11-14-2011, 06:41 AM
#14
99 and up you can do custom operating system, which you can control nitrous and can even do 2 or maybe even 3 bar maps?? I could be wrong on the 3 bar maps(i am no turbo guy)
also the 99's have a lot more idle tuning that can be done for when its time for the monster camshafts.
I am running a stock 99 computer and harness in my 98 t56 race car.
also the 99's have a lot more idle tuning that can be done for when its time for the monster camshafts.
I am running a stock 99 computer and harness in my 98 t56 race car.
11-14-2011, 02:57 PM
#15
http://www.chipsbyal.com/convert98/Convert98a.doc
That's what I used to do mine. Have to do a crank relearn and vats if you have it afterwords. Plus need a 02 program for a 98. Can go to Holdencrazy for a file
That's what I used to do mine. Have to do a crank relearn and vats if you have it afterwords. Plus need a 02 program for a 98. Can go to Holdencrazy for a file
11-14-2011, 09:17 PM
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http://www.chipsbyal.com/convert98/Convert98a.doc
That's what I used to do mine. Have to do a crank relearn and vats if you have it afterwords. Plus need a 02 program for a 98. Can go to Holdencrazy for a file
That's what I used to do mine. Have to do a crank relearn and vats if you have it afterwords. Plus need a 02 program for a 98. Can go to Holdencrazy for a file
11-15-2011, 06:59 AM
#17
99 and up you can do custom operating system, which you can control nitrous and can even do 2 or maybe even 3 bar maps?? I could be wrong on the 3 bar maps(i am no turbo guy)
also the 99's have a lot more idle tuning that can be done for when its time for the monster camshafts.
I am running a stock 99 computer and harness in my 98 t56 race car.
also the 99's have a lot more idle tuning that can be done for when its time for the monster camshafts.
I am running a stock 99 computer and harness in my 98 t56 race car.
The timing tables go to 1.2 grams vs only 1 gram in the 98s.
FWIW, one of the tricks I use on the 98s is to use the 2 bar SD COS when tuning a big cam car in speed density. Just keep the 1 bar sensor, and change the linear and offset to the 1 bar parameters, and just use 1/2 the table. That way you get the resolution of the bigger VE table (don't have to use the secondary VE).
