I think I might be getting detonation. I think I should back off at PT.. Where is it without going to a dyno?
I have posted on this forum several times how to create a safe/consistent timing map. Once this is accomplished you can start optimizing it for your needs. Use the search engine and I'm sure you will find multiple posts.
Go find the post and the logic and math I use to generate the timing map. There is no one number, generalized values etc. That will end up with disappointment and a pile of broken parts. If you really want to learn, do your homework and actually learn something along the way. The info is here for the taking. I honestly don't want to go thru the whole process again. A lot of people have told me it was the best info and concept on boost timing maps they have seen.
If you have some knowledge about what the heads, CR and fuel type would run for timing N/A there is a better way than big chunky adjustments that generally don't drive as good or perform as well at the track. Generally speaking a stock valve angle SBF with decent compression and good fuel like E85 that is ~105 octane 30* is a reasonable place to start. My race formula works the same way but is more aggressive and only pulls 0.5*/LB of boost after 10psi and up. RPM is your friend, don't lug the engine and definitely don't run a lot of boost around peak torque. Peak torque always happens at the highest cylinder pressure which is also where it's most likely to detonate. This method allows you to build a safe, consistent timing table that you can still tweak once it's working good and you can read the plugs etc.
That being said let's say 30* is our base timing so it's not a turd down low or hard to get up on the converter. We don't pull any timing until 5psi(super safe) then pull 1* for every 1# of boost. So at 10psi - 5== 5psi net boost.
5×1==5* timing to pull
30 - 5 == 25* @ 10psi
15psi - 5 == 10psi net boost.
10psi × 1 == 10* to pull
30* - 10* == 20* @ 15psi
20psi - 5 == 15psi net boost.
15 × 1psi/lb == 15* to pull
30* - 15* == 15* @ 20psi
25psi - 5 == 20psi net boost.
20 × 1psi/lb == 20* to pull
30* - 20* == 10* @ 25psi
You can do this in 1lb, 2lb, 5lb etc increments for whatever resolution you have in the timing table. You can also spot check your cells to make sure there following the curve and you don't have highs or lows that can effect performance or hurt parts. On race fuel I'm not afraid to run timing even higher than base if it needs it to spool or get up on the converter and still not pull any until 10psi. I generally only pull 0.5* per/lb of net boost. If you start off with a valid max timing value I have never seen it ever hurt parts. If I have info from where someone used a shitty map that hurt the engine and run the numbers my map would have never hurt the engine. This takes a little base knowledge but it really does work well and allows you to build a safe base map to start testing and tweak it in from there. Hope this helps.
YES, I've seen and reviewed that thread!I have posted on this forum several times how to create a safe/consistent timing map. Once this is accomplished you can start optimizing it for your needs. Use the search engine and I'm sure you will find multiple posts.