So I have a chance to get a what I suspect is a used preformance PCM what kind of gains and losses am I going to get if I buy this?

Edit; it's for a 1992 don't know if that matters mine is a 94.

 

there's definately a good amount of seat of the pants power gain, i cant say as to how much because i myself cannot find that information. i just installed one on my 93 V6 and boy did it really wake her up. before it would barely spin tires from a standstill, but now all it wants to do is spin tires. i know the rev limiter gets bumped from either 4800 or 5200 to 6000rpm. it has a much more aggressive ignition timing and fuel mapping, which raises torque throughout the entire range. given the preinstalled mods i have on my truck, it really picked up the mid-high rpm power. but this is just my personal experience. now as for it working on your truck, it might run it but it could throw a check engine code, if the price is right and the pt number matches a mopar perf PCM pick it up.
Chris

 

also you will have to run 91octane or higher fuel.

 

You might have problems with detonation since your '94 is a returnless fuel system and the '92 PCM is for a return fuel system. The '92 PCM is calibrated to see a rise in fuel pressure as vacuum drops with acceleration. Your '94 fuel system can't provide that unless you convert it like I did on my '94. I tried a '93 performance PCM on my '94 before I did the fuel system conversion and got bad knocking even with using premium (91 octane is the highest I can get around here).

 

Ah crap.. Sounded so great. What do I have to swap out to change my fuel system? Is it recommended or worth it..?

 

https://dodgeforum.com/forum/1st-gen...-360-swap.html

 

Doesn't look terribly hard to change out but is it worth it or should I just wait and buy a new one for a 94

 

I would suggest just to buy a new Mopar Performance PCM for a Ram 94 (I assume you have a 5.2).

Just to let you know I have a 93 Dakota with a 5.9 Magnum with the return fuel system with the 94-95 Ram Mopar PCM (returnless in these years) and she runs like a dream, no problems with detonation, premium fuel is required by Mopar for the High Performance PCM's but I hardly use it. No problems with regular fuel.

 

It makes sense that you don't have any problems running the 94-95 PCM on a 93 since you have a return fuel system so you get the extra fuel under load and staving off detonation. Extra fuel = cooler combustion temps = less chance of detonation. The o.p. is doing just the opposite, running a 92-93 M.P. PCM on a 94 so he's not going to get the extra fuel so he may run into detonation problems.

 

Well **** I guess ill fork over 300 odd bucks to a site an get it ahah. That's if I don't buy the "super bee" hood I'm looking at. Easy plug in power woo! Aha