IMHO the only things that HPPs are good for is to correct the speedo for a gear change, program the fans to come on sooner for a 160* thermostat and A4 owners can change their shift points.
Other than that I think they're pretty much worthless. If you do heads/cam/headers/etc. you should get your PCM custom programmed.
Chab
[This message has been edited by Scott Chab (edited 14 March 2001).]
Posted by agmSS (Member # 853) on :
I agree with Scott. My previous 3 4th gen f-bodies all were modified with the HPP3. Different units for 3 different model years. It made absolutely no difference on my '96 M6 Z28. On my '97 M6 30th, it was like night and day. It made a very big difference. On my '99 A4 Z28, it made no difference on the power, but worked well for letting me firm up the shifts and recal the speedo after I swapped out the factory 2.73's for the DTS 3.42's. It seems to be a more valuable mod if you own an A4. With the M6, my experience is that it's a crap shoot, and a pretty expensive one at that.
Good luck with whatever you decide to do.
Andy
------------------ '01 SS #3122 Sunset Orange / Ebony Lea M-6, All GM Options Y2Y Options:Bilstein Susp, Dual-Dual, 10-Spoke Chrome Whls, SS Grille, SS Mats, SS Car Cover, SS Dash Plaque, SS Key Fobs, SSOA-M01-3122
