cam timing

83toybeater · Post by **83toybeater** » Sun Jul 30, 2006 9:16 pm

has anyone played around trying cam timing, with any positive results?

takza · Post by **takza** » Mon Jul 31, 2006 4:31 am

I advanced the cam timing by one tooth (9*) and the car ran like the ignition timing was way retarded. The only good thing about this was that I saw the belt had oil on it and so I replaced it and sealed up where the oil was getting to it.

Typrus · Post by **Typrus** » Mon Jul 31, 2006 9:27 pm

Did you try retarding the cam?
In theory, advancing should better yours low end and retarding your high right?

Gasoline Fumes · Post by **Gasoline Fumes** » Tue Aug 01, 2006 3:56 am

takza wrote:I advanced the cam timing by one tooth (9*) and the car ran like the ignition timing was way retarded.

That was 9° on the cam gear? That's 18° on the crank, which is how timing is usually measured. Way too much to see any positive results. Try 1° on the cam.

Did you also reset the ignition timing when playing with the cam timing?

Typrus · Post by **Typrus** » Tue Aug 01, 2006 10:07 am

I think the issue with doing 1 degree is we need adjustable gears. The only thing we can do is moving it a tooth on the belt at a time I believe.

shogun · Post by **shogun** » Tue Aug 01, 2006 10:24 am

yo could also machine the sprockett to have the retarded specs

terceldude · Post by **terceldude** » Tue Aug 01, 2006 3:19 pm

takza · Post by **takza** » Wed Aug 02, 2006 6:20 am

Gasoline Fumes wrote: That was 9Ã‚Â° on the cam gear? That's 18Ã‚Â° on the crank, which is how timing is usually measured. Way too much to see any positive results. Try 1Ã‚Â° on the cam.

Did you also reset the ignition timing when playing with the cam timing?

I'd read a couple of places about good results advancing one tooth...I did move the dist back and forth with no good results....but didn't pull it out and rotate it any. Maybe I should have?

Gasoline Fumes · Post by **Gasoline Fumes** » Wed Aug 02, 2006 11:41 pm

takza wrote:....but didn't pull it out and rotate it any. Maybe I should have?

Doesn't hurt to try, but I still don't know if you'll see anything good from advancing it a whole tooth. How is the cam gear held from turning on these engines? I can't remember. I know on Suzukis you can drill a new hole for the locating pin. And on Hondas you can have an offset key made. There must be some low-budget way to experiment with the cam timing.

takza · Post by **takza** » Thu Aug 03, 2006 5:12 am

Its a pin and a slot in the gear. You could drill a new hole relative to any tooth...gotta be exact though.

With one gear I know of...a guy drilled several holes to allow various settings.

Guess he used an "indexer" on a mill?

Think if you advance the cam...the dist timing will be retarded? I thought I had enough dist adjustment to overcome this. Might not have....

Gasoline Fumes · Post by **Gasoline Fumes** » Thu Aug 03, 2006 10:49 pm

takza wrote:Think if you advance the cam...the dist timing will be retarded?

Sounds right considering it's gear-driven. Do you have a timing light?

takza · Post by **takza** » Fri Aug 04, 2006 3:27 am

Got one I don't use....???

Gasoline Fumes · Post by **Gasoline Fumes** » Sat Aug 05, 2006 12:20 am

I don't use them much either, but it should tell you if you're getting the ignition timing anywhere close to where it should be. And also if advancing the cam advances or retards the ignition timing.

takza · Post by **takza** » Sat Aug 05, 2006 5:41 am

I thought I had enough dist advance left to make up for the 9* rotation of the cam....probably should have stayed with it.