Cam timing

[monk]

Hey!

 

Has any one run thier cam timming a tooth advanced? I know Pintos and such respond well to this little trick I was wondering if Datsuns do as well?

 

Thanks

 

Monk

[Skib]

well theres 3 timing settings on the cam gear.

 

which one do you have it on?

 

 

[datzenmike]

The Ford motor may have been adjusted that way for emissions (the 460s were) and will benefit from some advance. You're assuming that Nissan did the same which I think they did not. (at least not to the extent Ford did)

 

Very generally advancing a cam brings the power on sooner and retarding a cam brings it on later. This is most noticable on a large overlap cam than a stocker.

 

The only way to tell is run the L series in the #2 hole (stock) location on a dyno and get a base reading and then try the #1 hole which will retard about 4 degrees and get a reading. Now put on #3 for a 4 degree advance and get a reading. You now have -4, 0 and +4 readings. If you wish to try even more advance and retard simply go back to the #2 hole and move one tooth forward or back. this will give you 9 degrees of each. You can even split the differens slightly by advancing 4 degrees to the #3 hole and retarding one tooth 9 degrees for +4 plus -9 = -6. You now have -9 -6 -4 0 +4 +6 +9 to work with. Simple