02-25-2010, 11:48 AM
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#3 |
| Tech Guru resident guru
Join Date: Feb 2002 Location: Fort Mohave, AZ Age: 57
Posts: 1,121
| Re: Piston ring eng gap on Hammer 701
Johnny,
Generally you don't get much choice on the endgap. To be sure endgap shouldn't be under .015".... but If you set up the clearance at .004" it's likely your a bit over .015" right now. Setting endgap only becomes an issue on engines that are set up with particulaly close piston clearances (if you fit the piston at .003" you may be under .015" endgap).
I agree the closer to stock timing is better for break-in.
Respectfully, Harry Klemm Quote:
Originally Posted by johnny340  Hello Harry,
I have a 61X 701 with your hammer kit upgrades and wanted to know your recommendations for piston ring end gap for Vertex pistons (.75 over). These are new pistons and rings with a fresh bore at .004". This engine also has an ADA head with 35mm domes, FP Limited B-Pipe, 46mm Black Jack carb, your lightened flywheel, and Advent Ignition.
By the way, would you agree that I should break this engine in with the ignition set to 24°, the setting closest to stock?
Many thanks,
Johnny |
__________________ Unless otherwise stated, responses to all forum posts are based on my personal experiences working within the PWC industry, and developing high performance PWCs since 1987. www.groupk.com |
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