Ford Racing SCJ Head

[automotivebreath]

Wow, threepiston, Eric and all; thanks for making me feel so welcome here.

Anyone have an opinion on why Singh recommends 0.070" piston to head clearance and
most everybody else (including me) recommends something tighter?

[Eric]

AB,
You most certainly are welcome here!
I read somewhere that 30 to 40 thou is most effective for a non-grooved engine but the wider clearances work best in conjunction with the grooves. I'll see if I can find more info on that.

[t120r]

The Singh man emailed me a year or 2 ago and told me that around 0.060" would be best for my engine with the grooves. I have to figure out how to hook up a knock sensor to the block and the AEM and then I'll be able to log the results. Even though you can't hear the knock, doesn't mean it isn't there.