Honda Spree and Elite 50 Forums

hi forum.
whats the highest temperature the Malossi BBK has ever gone without having any damage?

I've had my Corsa go to 425 degrees with no damage.

thanks in advance.

430 degree aluminum mhr

Thats gotta be * to troubleshoot. Especially 2 of them.

i have seen malossi mhr knock offs .cheap china kits with malossi markings .ive done 420 on my corsa .i did hit 525 on my ts185 the other week i pulled it apart and the bore looks fine and it still ride fine but i did upjet it .

So 430 is max for malossi MHR.
300 max the for the china copy MHR ones? I wonder who sells them?

I know malossi cools down quicker. but which one can take the most heat? corsa or malossi?

Greetings:

Both are quality kits, and I've had both bust 400 on a few occasions. That said, I don't think you can generalize by brand. Surely a lot depends on the Compression ratio at setup, the RPMs you run, the fuel used and many other variables that can make for detonation and grenading at a cooler or hotter temp. Regardless of brand, once the temp goes critical and detonation begins, the Life Expectancy is reduced to fractions of a second. The gauge is too slow to record the carnage. My last Malossi had not a scratch when I removed it. The Corsa was similarly pristine, at least until I fed it a carb needle E-clip. Both saw 400-ish on occasion.

450 is melting point for aluminum. If it's a hypereutectic piston, heat can go higher due to more silica in the aluminum to take the heat and not expand as much. I would shoot for 380-390f peak cht at wot. If your in the 400+ you risk seizing. Especially if your pilot is not set correct for throttle off after wot.

My tai 50mm sees 430+ some days, no seize action. I have MHRs and Corsas on the shelf but have not used one yet. I was not expecting so much life out of the cheap tai BBK.