I was just wondering how much timming I need to run with the engine not under boost? The combo is a pt76 turbo, air to air IC, hoping it will see around 26 psi later in life, but for now going to keep it around 18 psi.

Then engine is a 347 Ci with 317 truck heads, comp ratio is 8.5 to 1, spark plugs are a #9 NGK. Can anyone tell me what the factory timming is for a ls1, when I dynoed the car when it was bone stock, we did tunning on it and if I remember right the timming was like 26 deg? I just want to make sure before I fire this thing up, I am getting close now, and any help will be greatly appreciated!!

Thanks!!

 

I forgot, I will be running it on c-16 fuel or tt118!!

 

This thread is about timing that I made in the FI section a little while ago. Mightymouse posted his timing map (he is BS3 too), so you can get a look at what he is doing. He runs pump and lots of meth (but obviously not out of boost) and is about 8:1 I believe. His post is a few down.

https://ls1tech.com/forums/forced-induction/623534-turbo-guys-tell-me-about-your-timing-cr.html