mild cam idle surge and basic settings - tune and log attached

Caprice and GM-related general tech topics. Questions & topics on vehicle tuning, HP Tuners use, etc.....
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#802PalmBeach
Posts: 41
Joined: Mon Jun 14, 2021 10:33 am

mild cam idle surge and basic settings - tune and log attached

Post by #802PalmBeach »

Please help me with a few pointers and observations

restored from death 2012 Chevy Caprice PPV

105k miles

muffler delete and intake cone in stock housing

this will be my daily driver starting NOW... lol

I have followed many threads and created an alternative tune that starts and idles well but surges violently in gear. So I'm not posting that tune at this time unless requested

Here is the current tune and idling around the block for the first time :

EDIT: (The uploaded file does not have an allowed extension. )

won't let me upload hptuner files, can email if someone's willing to help
'12 Caprice PPV 6.0 L77
30 to 70 MPH in 4.0 seconds so far

'02 Silverado 5.3 L59
8.2 @ 86 (1/8 mile)

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CapriceX2
Posts: 85
Joined: Sat Jun 22, 2019 10:06 am

Re: mild cam idle surge and basic settings - tune and log attached

Post by CapriceX2 »

Did you get this figured out? It has taken me quite a while to get my idle sorted out after cam and exhaust, but I seem to be getting pretty close. I'd be happy to look at your tune or share mine with you if you are still interested.
Idle air flow, timing, and virtual VE seemed to make the most difference in smoothing out the warm idle, but I kept having problems with cold start. Optimizing the idle when warm seemed to make it worse when cold. I finally tried changing the open loop fuel tables - pulling quite a bit of fuel - and it really seems to be coming around. I now need to go back and optimize things for warm idle.
I'd really like to get the startup engine speed low enough to quit trying to drive through the torque converter at startup.
CapriceX2
2011 Caprice 9C3 - TSP 220R W/ DOD delete, 10.8:1 Compression, Custom Stainless Exhaust
1995 Caprice Classic Wagon
1996 K2500 6.5L diesel
hippiechris
Posts: 4
Joined: Fri Feb 28, 2020 11:26 pm

Re: mild cam idle surge and basic settings - tune and log attached

Post by hippiechris »

virtual torque tables.
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