1) What do I gap my plugs at? I've been running them at .035, and that's what everyone on the LS1 boards say when running FI.

But a buddy of mine who builds FI engines swears by .028. What's correct for a blown LS1 running 8lbs?

2) What size belt do I need with a stock crank pulley and a 3.6" SC pulley? I have a Dayco PolyCog 36.0" belt right now, but I wanna make sure it's the right one before I tear into things.

Mods in sig.
Thanks

 

Your ignition system should be able to fire the plugs fine with an 0.035" gap. Most likely a smaller gap would be ok, but 0.035" sounds about right to me.

Rich Krause