dajogejr Posted June 21, 2010 Report Share Posted June 21, 2010 Brandon, You're not doing anything for the Cheetahs above 68mm bore though, right? Quote Link to comment Share on other sites More sharing options...
blowit Posted June 21, 2010 Report Share Posted June 21, 2010 Brandon, You're not doing anything for the Cheetahs above 68mm bore though, right? D, we are testing a 72mm but that gets the sealing surface pretty thin. No thinner than an oring I guess but I like to maintain our design minimums of 5% of bore for mating surface area. I suspect the 72mm will work if everything is assembled to perfection but the testing will have to prove that to us. I guess if the demand was there, we could design a fire ring system into the 72mm to ensure proper seal but that will drive price up a bit. 72mm would be absolute max for that head though. 68mm has been proven very reliable for us running the 573 series pistons. Quote Link to comment Share on other sites More sharing options...
blowit Posted June 21, 2010 Report Share Posted June 21, 2010 Your modding the stock heads to fit a 73mm bore? No, we are still doing testing on a 72mm but that is as far as I would feel comfortable doing. Just not leaving enough sealing surface after that. We have done plenty of the 68mm without issue. A lot of guys running the 4mil, 7mil, and 10mil with 68mm bore and we have plenty of those setup right now. Quote Link to comment Share on other sites More sharing options...
shanYE west Posted June 21, 2010 Report Share Posted June 21, 2010 No, we are still doing testing on a 72mm but that is as far as I would feel comfortable doing. Just not leaving enough sealing surface after that. We have done plenty of the 68mm without issue. A lot of guys running the 4mil, 7mil, and 10mil with 68mm bore and we have plenty of those setup right now. sorry brandon.. I posted and realized the same question was asked and already answered.. so I delted my post. Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted June 21, 2010 Report Share Posted June 21, 2010 Brandon, are you machining stock banshee heads to fit cheetah cylinders or cub cylinders? I was under the impression that the cheetah heads were totally different the the banshee heads (bolt pattern, cylinder spread, etc.) Quote Link to comment Share on other sites More sharing options...
blowit Posted June 21, 2010 Report Share Posted June 21, 2010 Brandon, are you machining stock banshee heads to fit cheetah cylinders or cub cylinders? I was under the impression that the cheetah heads were totally different the the banshee heads (bolt pattern, cylinder spread, etc.) I probably mislead somewhere in my posts. Stock heads modded for Cheetah cubs are what we have been doing. 4mil-14mil. We are now working on a super cub head at 72mm bore. Other castings will require a different head design. We also do many mods for stock cylinder configurations like the ever popular 4mil LR. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted June 21, 2010 Report Share Posted June 21, 2010 That's what I wanted to know B. I read stock head and Cheetah...and aside from the bore, the studs are located differently...so I was wondering what you had up your sleeve for that. I'm with you now...I gotcha! Quote Link to comment Share on other sites More sharing options...
blowit Posted June 21, 2010 Report Share Posted June 21, 2010 That's what I wanted to know B. I read stock head and Cheetah...and aside from the bore, the studs are located differently...so I was wondering what you had up your sleeve for that. I'm with you now...I gotcha! Yeah, I probably misread the thread here and had "cub" on my mind. Quote Link to comment Share on other sites More sharing options...
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