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Author Topic:   k.b. pistons
dan ferry
Dirt Maniac

Total posts: 183
posted January 07, 2005 07:23 PM  
ive had luck with the kb flat top hyperutectics about 11.3:1 7000rpm im looking for opinions on the kb hypers with a small dome and antidetonation grooves cut in supposed to give 12.5:1 with 67cc heads im gonna run alky and roller cam and track 1's probably 7500rpm 383 cu.in. has anyone seen or used the claimer kits on ebay from raceparts $450.00 i found it under imca

cornerstone33
Dirt Roller

Total posts: 9
posted January 07, 2005 09:19 PM  
Sounds like your putting together more than a "claimer" motor. Honestly, I would spend the extra money to upgrade to at least a Wiseco Pro-Tru or J&E SRP forged piston. They will take more abuse, (i.e. too much timing or a lean fuel mixture), live longer and make more HP. But, if you insist, the KB's will live if they're installed/assembled correctly. Pay close attention to the top ring end-gap. They come with instructions. God bless and have fun.

paulickr
Dirt Maniac

Total posts: 110
posted January 11, 2005 06:03 AM  
i run the kb hypers in my 383 on alky , they work good for the money, as the other person said , watch the ring end gaps and maybe add a few thousanths to it to be sure.

we used them in a gas motor that got hot and detonated, it tore the ring lands right off then the car made really cool smoke rings but wasnt fast at all. i wouldnt run em in gas any more ever again but they hold up to alky really well.
for 200.00 more you could go forged and be sure though.

race on!!!

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