I am currently running my own DHP Beta code in my 1996 Bonneville. In case you guys are unfamilar with me, I am one of the tuners that have been doing custom tunes on cars like Scott Cook'* 12 second 2000 SSEi, and ZZP'* CSC 1997 GTP.
My 42 mph 2-1 downshifts and 5,900 1-2 and 2-3 upshifts make for tons of FUN on the street. No speed limiter and fans on at 185 degrees! This car is FUN as is and will stomp my buddy'* 2000 STS with NO PROBLEM from the launch, and on the freeway.
My Bonneville is a DAILY driver and NOT considered by me to be MY FAST CAR. Consequently the 1996 PCM I am developing will be for STANDARD mods like 3.4 pulleys, 180 T Stats, ETC. My car makes about 225hp at the wheels with only a 3.4 pulley and NO PCM tuning. Also I intend upon retaining the 4T60E transmission as they have proven reliable with my older 3800 Supercharged cars. Yes the differential is weaker but limit the BURNOUTS and she'll live fine!
I'll be tuning my SSEi to run 14.40'* in the 1/4 mile as this is competitive to cars like M-B E430 and Audi A6 4.2 cars.
These cars are not as HEAVY as we think!