plug question

[buzzman]

have a basic stock setup and switched to the colder ac43's, went to the track and car slowed down appreciably, it was a hot nite but my question is........why the colder plug as some suggest?

 

[Topjimmy]

Generally, the more power you make, the colder the plug should be to help prevent detonation. 43's should be ideal for your setup, gapped at a "tight" .035 or .032/.033 with alchy. It's only one heat range colder than stock. And yes, hot temps are these car's worst performance enemy.

Good Luck - Jimmy