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By John Mummert - Last Year
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https://youtu.be/ctydAgMfj0w
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By 55blacktie - Last Year
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Hi, John. The 6254HS rods arrived within 2 days of placing the order. They were packaged so well that I was reluctant to take them out of the box (but I did). Now I have to find someone to offset grind my 292 crank without charging an arm and a leg.
Do the forged pistons use a 1.5 mm or 1.2 mm compression ring? Are rings included? Moly coated top ring? Valve reliefs ccs? 4032 or 2618 alloy?
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By John Mummert - Last Year
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1.5mm 1.5 3.0mm ring package, 4032 alloy SRP JE piston, top ring is steel, much tougher than moly coated iron. The rings are out of a current production popular vehicle. Why not let some of the big OEM technology work for us.
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By John Mummert - Last Year
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55Blacktie the messenger appears to be having problems. The valve reliefs are 3 cc. Piston to valve clearance has more to do with duration than valve lift. If the cam is less than 235* @.050 valve pockets are usually not needed.
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By cos - Last Year
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Blacktie Had a 312 crank OS ground a few months ago. The problem around here (Oregon) is finding a crank grinder with a narrow stone to cut oil seal and sling. sling. Have not assembled engine yet hoping indexing is good but I mentioned it to him I was concerned. Another thing if you are using a crank that has been cut before (probably not) make sure radius on outer part of rod throws is there because it just barely get touched. Using a 292 will save you all of that (sling area). When balancing my crank had to cut OD of counter weights (200 grams) as I remember. I have seen cranks balanced by drilling holes in counterweights and didn't like look. Had one quote of $150 hour said a LEAST 4 hour job. May be a push to send it to John for OS grinding. Cos Oregon
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By 55blacktie - Last Year
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What I'm finding is persistence is required whenever looking for a competent shop that's willing to do the work.
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