[Pro Stock John]

^wtf

Timing also depends on whether you are running good rods/pistons or are SBE. Good tuners will limit timing even more with an SBE combo.

My current combo is similar and my WOT timing advance is a lot like yours. Tuners will suggest you pull plugs to see what timing is safe.

 

[Pro Stock John]

@64nailhead do you have someone tuning your car? Using a Holley system?

 

[Pro Stock John]

I talk to a buddy of mine with a build similar to ours about twice a week. We share the same tuner, and the consistent message is to pull plugs when increasing boost. That combo is 3300, forged 370 iron block, 83mm, gone from 9.20 to 8.50. Been watching the timing mark. Around 20-22 degrees on C16.

For some combos that aren't very efficient, let's say a $100 a/a intercooler, SBE, there would be a point where the person is pulling all the timing out of it to keep it from coming apart. You could end up with a budget'y combo that is running 10 degrees of timing and 30 lbs of boost and it's not picking a lot of power... Essentially finding the limit of the combo.

But for example with this other car he upgraded from a Mishimotor a/a to a Shearer and saw a really good drop in IATs. Had he kept the $300 intercooler he'd be pulling more timing. IATS dropped like 50F and gave him more room.