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Talk about engine building here. New products, tricky questions or showcase your work - If it's engine building related it's welcome here.
= Resolved threads
Hi all,
Trying to figure out minimum quench distance I can run in a possible upcoming engine build. Anyone know how much a hypereutectic alloy piston will expand vertically as it gets hotter vs a 4032/2618 alloy? Additionally, any guesses on how much a 4340 steel rod will stretch at a maximum of 7000 rpm? Piston rock is not really a consideration as I've found a technique to reduce it to a minimum. I read an article by Kevin Cameron (I think) a while back where motorcycle racers were testing minimum quench distances and landed around .020 inches or about 0.5mm. This was at over 16000 rpm using high quality materials but I have a feeling in my application there is a chance it can be reduced further. Just something I've been thinking about, let me know your thoughts.
Thanks,
Demetri
Hmmm, my response seems to have disappeared.
Anyway, it would help if you gave some info' on the engine, use, and fuel?
Some good info in this discussion on speed talk covering quench. On page 10 of 22 they talk about different piston materials and there expansion, also piston/rods stretch at rpm. Hope it helps.
Accidentally deleted my reply to Gord.
M52TU, street use, 93 octane. Trying to figure out how much things expand so I can run the closest clearance without smacking the head.
