Jetting and timing

[Medicshee350]

If I advance my timing 4 degrees will I need to rejet, or will it be fine?

[STRIBZ]

should be fine, do a plug chop to make sure.

[Medicshee350]

thank you 

[blowit]

Advancing timing does not require rejetting, however, if jetting is borderline lean, this can lead to detonation issues.  Make sure your jetting is dialed in, and as recommended, check plugs after timing change, especially the ground strap for indications of heat.  However, 4* is a pretty standard and safe value for pump fuel engines and usually works without issue. 

 

 

Brandon

Mull Engineering