Dhc Pcm

Does this mod work on the gt automatic?:sun:

And has it ever been known to mess up a transmission?

Yes it works for an automatic, the DHP PCM is ment only for GP, Monte Carlos, and Regals. I wont mess up your tranny either. It was designed for the stock GT, unlike the GTP one where you need a few mods for it to really work.

This mod will help your shifting. Have you ever noticed when you are driving and you want to stomp on the gas and it seems as if there is no power pulling? This is the reason. With this istallation, your car will pull harder and shift when you feel it should shift. Improves Passing Acceleration as well....:)

Very good mod on both the gtp and the gt :D

I had the mod done to mine just recently.

i just like the fact that i don't have to run my car on premium, with that mod, i think you have to

I just purchased an 01 GP-GT :rofl: (It's great learning all about this sucker..)

With the DHP PCM, where does the need for high octane feul come from?
Is it turning down the knock retard? If so, wouldn't that only become a serious issue when driving at high rev's (i.e. wouldn't 93+ feul only be needed when driving hard)?

FunkyBside

************************************************** ***
forgive me if this is obvious... didn't know squat about cars 2 weeks ago,
but my new baby is giving plenty of modivation for learning!
************************************************** ***

I just purchased an 01 GP-GT :rofl: (It's great learning all about this sucker..)

With the DHP PCM, where does the need for high octane feul come from?
Is it turning down the knock retard? If so, wouldn't that only become a serious issue when driving at high rev's (i.e. wouldn't 93+ feul only be needed when driving hard)?

FunkyBside

************************************************** ***
forgive me if this is obvious... didn't know squat about cars 2 weeks ago,
but my new baby is giving plenty of modivation for learning!
************************************************** ***

The need for higher octane fuel comes from increased timing capabilities (if your engine is setup properly) and a higher rpm redline. The dhp kicks the timing up a bit and increases max rpm from 5800 to 6000rpm. Those two combined factors require a higher octane fuel. If you have a gtp you should really be running 93 or higher anyway. Our cars computer is setup to work around this fuel, and simply dumps timing when detonation occurs with a lower grade fuel. If you want maximum performance from your vehicle 93 or up is the way to go period whether a dhp is installed or not.

As far as knock the dhp helps eliminate knock and especially "burst knock". Burst knock is when you ram the throttle to the floor suddenly on the highway (usually on a warm or hot day) and your gtp refuses to show its power temporarily. This is more prevalent with a 3.4 or lower pulley due to the increased temps they create. The dhp runs very rich during sudden throttling like that since a little extra cold fuel can cool down the chambers in your engine and prevent it. I believe it runs a little leaner than stock in the higher rpms to take full advantage of 93 octane or higher fuel but I'm not sure on that.

I understand the above, but my point was I rarely ever drive above 4800-5000 rpms, and it's a GT not a GTP.