NOPANTS-68

I did some searching on the subject, but didn't find what I was looking for. I'm trying to see what other people have done with their MAP table as far as how much advance and where it comes in. My combo is a stock 2002 LS1 with a TREX cam and a Holley 750. Been tuning on it, but am still getting some pinging on the big end. I've currently got 12* initial, 22*@1000 RPM, and 28* all in at 3000 RPM. Seems right for what I'm doing, but the MAP keeps adding too much timing. Can anyone shed some light on what they have found to be right? TIA, Dave

b00sted

iTrader: (7)

Honestly I never touched that table...Just left it zero'd out.

Driveability is still great without it, and while mileage might be affected slightly, it's not a concern for us.

b00sted

iTrader: (7)

Theoretically, you want it to add a little timing in the part throttle cruise areas and during deceleration.

Don't add any on the high rpm/high load areas, and don't add any at idle. Although, most big cam LS1s like timing at idle(20-24*)...Your's may idle better if you bring you idle timing up to at least 18-20.

hellbents10

iTrader: (10)

At high loads zero out the map table so it does not add at WOT, so from 80-100kpa zero it out. The do well with 27-28 from 2500-redline with about 24-25 at torque peak.

under pressure

iTrader: (13)

This may not be an elegant solution but you can go to the setup menu and set the total amount of timing allowed to the number you like, so the timing map will add whenever it is told to but never go over your total timing limit set. I tried this approach and got rid of the annoying detonation that occured at specific driving loads. Motor definitely pulls harder with less over advance.

NOPANTS-68

I zeroed it out at high load levels and brought it in a little at a time at part throttle cruising. I also tried just setting the max at 28 and it also worked really well. Thanks all.