race fuel &43'2

[shmed]

ok im going to the track on sat, running c16 and hopefully 20 psi and MORE!!!
i know its recommended to run 42 AC, but is there really that much if any at all difference? besides one being hotter.
i currently have 43's in it gapped at 35 which are new.
any tips?

 

[blackbuick87]

Run the 43's and chnage the gap to .030 - .032 for the high boost. The helps prevent the spark being blown out. It should run fine. If not you have a weak spark

 

[Sinful6]

increasing the spark plug gap is the same as advancing the timing. If you don't know the gaps to run, I would try .035 first, and if you blow it out, try .034. basically your looking for the maximum gap you can run without blowing the spark out.