Originally posted by markp27
I have a similar question to daniz24:
I ran my 2nd JP FX Palmaris today and I have a head clearence of 0.4mm (measured with a piece of solder wire). I run 16% fuel and a 6TF plug. Air temp was around 16C.
I found that the power was excellent, but I couldn't get the temp above 100C without it leaning out completely.
The car would bog down (lean not rich) coming out of a hairpin after a few laps. At first, I thought it was the LSN too lean, but even after richening the LSN right out, the problem persisted.
I leaned the LSN back again (it idled at 70-75C) and richened the HSN, the power was back, but the temp after a hard run was 85C.
Is this because the head clearence is too small?
If I put another 0.1mm shim in, would this stop the engine leaning out at low temperatures?
Cheers, Mark.
Hi Mark. Take one .1 mm shim of and it will change behavior of engine. With 16% nitro-0.4 is little bit too much. lease remember you are running EFRA cranck with 7 mm hole and it is different to outlaw ( IFMAT, ROAR) type (7.5+ hole).
Edward