pokeatyou2 Posted January 31, 2007 Report Posted January 31, 2007 i have a prodesign cool head with standard bore domes i am just about to get some porting done and my first bore to freshen it up for new pistons whats the go with the big bore domes am i going to have to get new domes how much can u bore before u have to use big bore domes? Quote
itsaripper Posted January 31, 2007 Report Posted January 31, 2007 When you get out to .080, which is the eighth bore size. Quote
dajogejr Posted January 31, 2007 Report Posted January 31, 2007 When you get out to .080, which is the eighth bore size. Actually...you can use them up to .100, but...after .080, you're really thin on the waterjacket to cylinder material. I know someone will chime in and say theirs runs great, no problems...yadda yadda about being at .100...but, it's thin. Once you get to a big bore piston, 68mm or larger, you'll need domes cut. Quote
87sheerips Posted January 31, 2007 Report Posted January 31, 2007 Actually...you can use them up to .100, but...after .080, you're really thin on the waterjacket to cylinder material.I know someone will chime in and say theirs runs great, no problems...yadda yadda about being at .100...but, it's thin. Once you get to a big bore piston, 68mm or larger, you'll need domes cut. Haha you called it.. I had a .100 over motor that ran awesome for 2 seasons. Still never blew it up, changed cylinders to get some porting and some more reliability!! It is thin, and did run warm sometimes but never had any problems with it. Id say depending on your budget, you can use your cyls to .100 over, just make sure you have a dependable builder. Quote
Bansh-eman Posted January 31, 2007 Report Posted January 31, 2007 he was asking how much you can bore it over before its a big bore... not the maximum bore you can take it out to if i read it right... .080 until you hit 68mm which is bb .100 is the max you can bore it before you need it resleeved Quote
pokeatyou2 Posted February 1, 2007 Author Report Posted February 1, 2007 he was asking how much you can bore it over before its a big bore... not the maximum bore you can take it out to if i read it right... .080 until you hit 68mm which is bb .100 is the max you can bore it before you need it resleeved thanks mate question answered i am still am to run standard domes on the first bore Quote
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