Visit The Dirt Forum for More Information

Author Topic:   Timing Question
racenmotorsports
Dirt Maniac

Total posts: 169
posted May 29, 2005 01:08 PM  
I got an intresting one this time I can't figure out. I locked the distributor and set the timing at 32 degrees, when I bring the engine up to about 2000 rpm the timing drops to about 24 degrees. The wear on the dist. gear looks normal. Any idea what is happening?

Other problem... went from 55 jets to 67 jets in my rochester 2bbl, now its running way too rich, when I adjust it down it'll stumble before it leans out. Any ideas on this one?

eaton89
Dirt Freak

Total posts: 268
posted May 29, 2005 01:25 PM  
Check the end play in the distributor( between the gear and the dist housing. If it is excessive it will cause the distributor gear to climb up the cam gear causing the timing to change. I'm not sure what the end play should be but someone on here will know what it is.

eaton89
Dirt Freak

Total posts: 268
posted May 29, 2005 01:28 PM  
Also how did you lock it. The centrifical needs to be locked as well as the vacume advance.

racenmotorsports
Dirt Maniac

Total posts: 169
posted May 29, 2005 02:02 PM  
Endplay isn't excessive, I don't remember what it was and when I locked it I did both the vacuum and the centrifical.

28 T
Dirt Full Roller

Total posts: 30
posted May 29, 2005 09:05 PM  
what kind of harmonic balencer are u runnin maybe its messed up and throwin your timing marks off (just a thought)

[This message has been edited by 28 T (edited May 29, 2005).]

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 30, 2005 04:11 PM  
how about the timing chain. Is it loose or is it new and tight. Can make the timing jump around at lower or constant RPM's

racenmotorsports
Dirt Maniac

Total posts: 169
posted June 02, 2005 02:18 PM  
new balancer, I'm going to check the chain and make sure I put it in the right way and not backwards.

Thanks for the ideas.

Back to the Archives