I bought another G8 GT a few weeks ago and I am working some bugs out of the pro tune. One that has me puzzled is during light throttle acceleration, the engine rpm dips a few hundred rpm and then returns to normal after the shift. Perhaps this is normal but I've never had a stalled car before. It drives and shifts perfectly at higher throttle. It was previously tuned by a shop. The gears and stall were accounted for.
I can post a log later but the pertinent mods are
Rebuilt stock trans
Yank 3200
3.45 gears.
Is the rpm dip normal with a stall or what should I look at in the tune?
Heres a log that demonstrates what I am experiencing. Frame 2680- rpm dips 200 during the shift from 1 to 2. Happens at all shifts noticeably except for 5-6.
Post the tune.
I only pull out 20% TM at part throttle and my car doesn't do anything like that at all.
I'm saying it's your shift times and pressures. That shift lasted damn near 3/4 of a second.
The pro tune that came on the car had full TM. I pulled 50% out of cruise and it virtually went away. I hadn't noticed the TM until someone mentioned it. The partial shift times are 0.3. Could be shortened to 0.25 but I don't want them any faster than that.
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