Advancing stock cam?????

[gobeli67]

I was looking around online trying to figure out if i can advance me stock cam setup by just loosening up the timing belt and moving it ONE tooth. I read that advancing it will give me more top end. I read up a little more on this and I found that you should only turn it ONE tooth because this is 7 degrees of advance, and that i should only do this on my intake cam. Please let me know if this is correct. I dont want to do this until i know 100% i wont bend my valves and/ or mess up my pistons.

 

[faracon]

I know with the 91-94 CAS you can just loosen the bolts and advance the engine. I would say this would be safer than skipping a tooth on the timing belt. Do you have a logger or anything to monitor knock? 7 degrees is a lot of timing to advance without anything monitoring your engine. Especially with that 125 shot of NOS.

My 2 cents....

 

[andymoraitis]

I know with the 91-94 CAS you can just loosen the bolts and advance the engine.

The original poster is referring to a change in cam timing which is entirely separate than what you're referring to (ignition timing).

On topic, advancing the intake cam has a tendency to bring on faster spool. Unless you have a different turbo and haven't updated your profile, there's absolutely no reason to do this on a small turbo. Furthermore, adjusting cam timing by a whole tooth (7 degrees) is way too much anyway. You likely won't have piston to valve contact, but it's too radical a change and not the most effective way to achieve your goals. Pick up a set of adjustable cam gears, take it to a dyno and advance the exhaust for more top end or advance the intake for more low end in small increments.

Make sense?

Andy

 

[gobeli67]

Ok thats kinda what i figured. Im gonna get some Fidanza or HKS adjustables. Thanks for the replies

 

[donmagicjuan]

To expound upon what Andy has already stated, here's an article taken from ProStreet's website as regards cam gear tuning on a 4G63: http://diy.prostreetonline.com/techtips/showarticle.asp?articleid=7