ajw2500hd

iTrader: (12)

I have a 98 camaro ls1 m6. Do i need to change my pcm to a 99 or newer if i want to tune for cam or build motor etc.?!?!?! Thanks aj

ArchetypeZ28

iTrader: (3)

You don't have to but we would highly suggest that you do so. We did a bit of a write up on this a long time ago.
http://www.efialchemy.com/db/02to97pcm/02to97PCM.html

LS1-450

iTrader: (33)

The 99+ is definately a better choice. However, I have not had any issues using a 98 PCM to control my H/C LS6.

98 PCM uses the back-up VE table for AutoVE. The back-up table columns are scaled every 10 KPa MAP. So, you have to fill in the 5 KPa columns on the Main VE table by estimating the value between columns. PE fueling has not been an issue.

JonCR96Z

iTrader: (33)

99 and 00 also have secondary VE, but they can be updated with a new OS.

For a radical setup or forced induction. Definitely go with a newer PCM. You'll be OK with heads and cam though.

2manytoys

iTrader: (9)

I asked the same question before purchasing my car. Most people said I would not have any problems with tuning the 98 PCM. I do know that there are some restrictions to the 98's but I think that is for FI setups.

slow

iTrader: (7)

IF I had a 98 corvette, I would switch regardless. On my 98 f-car, I switched, and then switched back, since I did not like the wiring harness mess with the pinout arrangement.

Ryan