SPARK changes in AFTERMARKET HEADS..,??

[xkuntrycowboyx]

So really the bottom line is that on a stock car, IF you can avoid detonation (doubtful) you really get no benefit from advancing past 14.5* at the crank - past that you are oversparked or getting detonation and not realizing it.

Aftermarket heads and it's another story - they will change the entire ballgame as far as spark is concerned.

Hope this helps,

Don

Was reading this and am curious to learn more if anyone has any info or places to go to learn this.

Just wondering in what ways, and how to figure it out. As far as where to go with timing with aftermarket heads

 

[Don 95Vert]

The SCT Pro Racer's tuning manual is a great source for this kind of info.

With aftermarket heads, you just advance timing until it pings, then back off 2* - or if if power does not increase - and I'd consider a power increase like 4-7 RWHP per timing degree... if it's only 1-2 RWHP, then I'd back it off a couple.