piston to wall for supercharger?
01-21-2007, 01:19 PM
#1
piston to wall for supercharger? what piston to wall clearance are you guys building your motors to or having them built to for 2618 diamond pistons for a blower motor? the spec card with the pistons says .0035, than in the extra paper that came with the pistons it mentions clearance again. like .001 to .0025. are they talking about an additional .001 to .0025 on top of the .0035? the motors Ive built in the past for people using lots of nitrous with a utetic piston or a forged piston were in the .003 range, this is my first blower motor so I just want to double check with people who run them. Thanks.
01-21-2007, 06:45 PM
#3
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I went .004 with my Diamond pistons and supercharged motor. I talked to Diamond and they said the extra .0005 clearence would be fine. So the piston was designed for a 3.905" bore and I had it honed to 3.9055". They also recommended I upgrade to the H-13 tool steel wrist pins which I did... 
