Hans

are they short enough to stay top fire, I figured they have to be converted, but havent seen a 'set' answer.

also .050 for leading and .085 for trailing is what Yaw has, any luck with this setup, sound close?

thanks

rotarygod

iTrader: (1)

Convert them to side fire. If you don't the apex seals will hit them. Gaping is about right but experiment here. I hope you have some form of direct fire. If not they probably won't work as good as the stock plugs. Be careful with those autolites. They have a VERY short lifespan. Be careful the ceramic doesn't crack and fall through the engine. I had 2 plugs do that on my old 2nd gen motor. Still ran but when I rebuilt it I could see exactly which plug had broken just by looking at the rotor housings. With a direct fire system the power increase is impressive for the amount of work and money involved. I've had better luck with NGK BP7ES plugs converted to side fire. I buy them at a local motorcycle shop for a few bucks each. They are what is currently in my GSL-SE. I only use them on leading and use 2nd gen plugs on trailing.

Blitz0309

Damn, i never thought about apex seals hitting the top of a plug. That would suck.