Spark plug gap

[Matt McClung]

Just wondering what some of you have for gap on these hot air TR's I get a slight backfire when I have my boost above 15 psi. I know that my gap is quite big, but don't know exactly what it is. I installed a new coilpack and ignition module, new Taylor wires.
Runs real strong with the boost turned down to 10 psi and the thumbwheel chip set to #5.

Thank You
Matthew McClung

 

[turbowrenchhead]

.35 gap

 

[Matt McClung]

Thank you very much I am headed to the shop right now!

Matthew McClung

 

[turbowrenchhead]

I ran the CR42TS at .35 gap with no intercooler.

 

[WFO]

yup,start at .035.you may have to tighten it up as the boost goes higher and higher.

what kind of plugs you running?