How much TIMING will a NA car handle?

[J DAWG]

Assuming one is tuning in the worst conditions. High heat, humidity and using 93 octane what is a safe range for timing. 30, 32, 34???

No knock sensors and loud exhaust makes it impossible to hear knock until it's to late.



So far 30 has been a safe range, but just wondering what some others have gone up to.



John

[txlen]

what are you tuning with J Dawg????...a VEC2??....

[J DAWG]

yes....a VEC2. What have cbeen your experiences with NA cars. I have a heads/cam car and was wondering do modded cars tolerate timing or not in general.

[txlen]

if you want you can e-mail me your setup you're running right now and i can compare it to the one i did....txlen@yahoo.com ...ok??...Len

[J DAWG]

thanks.

[V10 MOJO]

john, whats your vec2 settings at? shoot me an email and ill send you mine to compare

[J DAWG]

Rich, will do.

[Fast Freddy]

put it on a chassis dyno and advance the timing in 2 degree increments until you lose power. then back it down 2 degrees from there and you will have optimum safe power the crude way. good luck and don't forget to pull your plugs and check em > look for a nice tan color with no pitting, etc.

also - most chassis dynos' have O2 sensors that can sniff out your A/f ratio, so 12.9 is what you are looking for. but if you are running cats this can throw the reading off unless you get a reading pre cat at the header collector.

p.s. - the 1st method i have suggested here will tell you more about what your timing is doing in regards to detonation.