WOT Spark Advance

[MHK5]

What's a typical spark advance range at WOT for these gen3 engines? N/A tune, not interested in timing for boost or nitrous for now.

I pulled timing, and added fuel for my first few test drives to be on the safe side. I am getting fuel dialed in closer and think I need to put some timing back in. I'm just curious what you experienced tuners typically see. I know every motor will be different, I'm just trying to get a ballpark range.

To get more comparable feedback, my motor is a 403 made out of a LQ4, H/C/I/headers, 11.4:1 CR on pump gas.

[horsepowerguru427]

most LS like mid 20's for timing. theres always exceptions but i would expect mid to high 20* mark would be where youre aiming for...start around 24* and see how it likes that. increase a degree and re-log for results as necessary.

[04silverado6.0]

I would definitely start in the 19-21 range at peak torque. That may be really close to mbt at peak torque. I would not expect for this to ever get into the high 20s and pick up enough power to keep safely.

[blindsquirrel]

...and don't pay any attention to the timing numbers people are using on dyno engines, with 130* coolant temps and cold dry intake air and limited run times... in a real vehicle the 'right' WOT timing will be much lower.

[MHK5]

Ride on - I was at 13* on my last drive around. The delivered torque value peaked about 1,000-1,500 rpm earlier than I expected with the cam.

I?m still going to be safe and add timing just a couple degrees at a time. I?ll probably stop if i get to the mid 20?s even if I still have 0 KR.

[04silverado6.0]

Without having a dyno i would stop in the 21-23 range at peak torque. Depending on your heads that may still be excessive. Also will depend on the vehicle and how it is driven, a 3500hd with a tractor behind it in the middle of August may not tolerate so much spark or leaner afr.

[MHK5]

Without having a dyno i would stop in the 21-23 range at peak torque. Depending on your heads that may still be excessive. Also will depend on the vehicle and how it is driven, a 3500hd with a tractor behind it in the middle of August may not tolerate so much spark or leaner afr.

That?s more or less the advice i was looking for. I?m getting it as good as I can on my own.

It?s built for Nitrous. I?ll take it to a dyno and get some more experienced help once that is installed. We will perfect the Na tune at that time. In the meantime I want to get a good but conservative tune done on my own.