what timing to run

[Mr. Spool]

I am installing a t3/t4 50/63ar and am going to run it at 6.5 psi with my tial. My question is can I run this on stock timing or should I set it back to say 18. I have seen kits for sale that promise 238 whp with stock timing and I am sure this wont reach that but I just want to make sure. thanks.

[RBS14]

do a search. Different people recommend different amounts of retard. But a widely accepted amount is .5 degrees of retard per lb of boost. So with ~7pis, you'd want to set your timing at about 16-17 degrees btdc.

good luck.

[skatanic28]

the 370's will also bump you up a bit on the timing map, so stock timing might be a bit risky.

[Mr. Spool]

Sounds good, I will bump it back a bit. I have the msd btm but I cant find anyone who has installed this on the internal coiled s14. If I take it back to 17 what kind of difference will I feel in driving off boost. thanks.

[Silverbullet]

oem timing is 15 degrees before TDC. and stock boost is at 7psi. What advatnages do you get by retarding it?

"But a widely accepted amount is .5 degrees of retard per lb of boost. So with ~7pis, you'd want to set your timing at about 16-17 degrees btdc." - is that just on a larger turbo with bigger AR size or accepted in general on FI motors?

[RBS14]

stock timing IS NOT 15 degrees btdc. Stock is 20.

.5 degrees retard per lb of boost is widely accepted for ka's. I'm not sure about other engines.

[Mr. Spool]

thanks for the imput, but I have a ka-t, so stock timing is set at 20. thanks though

[Silverbullet]

ooh sorry, i was under the impression that he was talking about SR20s.

anways back to the question. Why do u retard your timing when you increase boost?