Feature Req: 2nd idle timing table

[krisr]

Would it be possible to get a second switchable idle advance timing map? Those of us that have an automatic transmission, having a map for P/N and a map for IN GEAR can really make life so much easier to tune how the engine recovers after shifting in and out of gear. I find in cars with big cams timing values of ~30deg BTDC is not unheard of and ~15deg BTDC out of gear makes the idle valve only move a few steps. I previously was running the tableswitch input against the inhibitor switch of the shifter so I was running 2 ignition tables prior, however i'm now setting up for a flex fuel sensor so need to use the 2nd table for flex.

Thanks
Kris

[nathaninwa]

Have you tried idle timing correction at all? I've done 4 installs with autos. Stock cammed 7mge, semi roudy 383sbc, my own ls3 with 12-1 and cammed heavily and now with 9-1 and turbo cammed. Each setup falls right into gear with minimum time for idle correction to keep rpm

[krisr]

Are you using the main IGN table with bins around idle or using the idle timing table with spark correction for rpm? Is it possible to take a peek at the 383 tune? Mines a 400 so it'd give me a rough idea. I've managed to get it to idle around 75-80kpa both in and out of gear with the current table switch method and it's a 242/248 @0.050 HR on 110lsa and play/idle nicely at 1000rpm.

https://www.youtube.com/watch?v=jailgNdoa54

[nathaninwa]

Yes, main table only with rpm timing correction,

This tune is with a pwm idle motor but the behavior was similar with the stepper motor, just had issues with being consistnat

this tune is from a 41 chevy convertible with a 70 year old man driving, and he was tickled with how it drove and he never had to do anything funny to keep it running at any point.

[krisr]

Cool thanks mate. I need to finish some wiring before I can fire the car up again to play with it again.