strictlycali Posted December 3, 2013 Report Share Posted December 3, 2013 JUST STARTING MY BUILD FROM FRAME UP AND I'M CURIOUS AS TO HOW BIG I CAN GO WITH JUST BORE, PORT ETC... ALSO HOW MANY HP CAN I GENERALLY GET OUT OF GOING THIS ROUTE? Quote Link to comment Share on other sites More sharing options...
fappy'97 Posted December 3, 2013 Report Share Posted December 3, 2013 So you're trying to do this without splitting the cases? Quote Link to comment Share on other sites More sharing options...
strictlycali Posted December 3, 2013 Author Report Share Posted December 3, 2013 THAT WAS MY PLAN BUT IF I CAN'T GET DECENT POWER THEN THERE GOES THAT IDEA...LOL Quote Link to comment Share on other sites More sharing options...
strictlycali Posted December 3, 2013 Author Report Share Posted December 3, 2013 AND AS FAR AS SLEEVE, THAT DOESN'T MATTER. JUST CURIOUS ON MAX WITHOUT SPLITTING CASES. Quote Link to comment Share on other sites More sharing options...
sprinklerman Posted December 3, 2013 Report Share Posted December 3, 2013 Not a smart move. If you bump up the power, you really need to address the bottom end of the motor. 1 Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted December 3, 2013 Report Share Posted December 3, 2013 Why the f wouldn't you just split the cases? Quote Link to comment Share on other sites More sharing options...
wayne_smith97 Posted December 3, 2013 Report Share Posted December 3, 2013 Go through the bottom end. If you get good power out of the top end you will be tearing down all over again but this time the bottom end as well because of trying to save time and money which in turn will cost you way more than just doing the bottom end now. Talk to a reputable builder and they will steer you in the right direction 1 Quote Link to comment Share on other sites More sharing options...
jayzx10r Posted December 3, 2013 Report Share Posted December 3, 2013 (edited) What everyone is eluding to is that the crank in it's stock condition is weak. The crank pin needs to be welded to ensure the crank assembly doesn't rotate and become out of phase. You can do the basics... pipes, mild porting, jetting etc, but I wouldn't be doing any power launches on asphalt with an unmodded crank. Welcome to the BHQ. Edited December 3, 2013 by jayzx750 1 Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted December 3, 2013 Report Share Posted December 3, 2013 (edited) Just split the cases and have it gone through for peace of mind. Once the clutch stuff is off and you get inside the cases, there are literally 3 big parts. Crank, and two tranny clusters. Edited December 3, 2013 by trickedcarbine 1 Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted December 3, 2013 Report Share Posted December 3, 2013 CAPITAL LETTERS. Quote Link to comment Share on other sites More sharing options...
KaN Powersports Posted December 3, 2013 Report Share Posted December 3, 2013 The stock crank can accept an array of power mods. The reasoning for going through all of it is more 'wear & tear' related. If you have an engine that has been run for some time, play and fatigue set in. If you are modding for more power it is advisable to build the entire thing so that there are no surprises later. Years ago I slid a cam into a good running 350 small block. Ran real good when done, within 3 weeks #1 rod had a spun main bearing-lesson learned (I think I was like 17). Replace/rebuild your crank for peace-of-mind, then you'll have a solid foundation for you rotating assembly. Make a Plan for the build, educate yourself, and execute it-you'll get more performane for the dollar this way; rather than randomly throwing parts/mods at it till your either exhuasted, or have spent enough for several builds. Quote Link to comment Share on other sites More sharing options...
KaN Powersports Posted December 3, 2013 Report Share Posted December 3, 2013 To answer the question-haha; Stock bore can be taken to around 66.5mm With a new sleeve fitted, you can shove a 68mm piston in there and this sleeve maxes out at 69.5mm All sizeable overbores should be complimented with correct/matching porting to restore or enhance the port's job..... 1 Quote Link to comment Share on other sites More sharing options...
KaN Powersports Posted December 3, 2013 Report Share Posted December 3, 2013 440cc? Super Wampus? http://www.cpindinc.com/pub/view_product/105?lm=3&name=CPI-W7254-115 Good point-haha He needs to specify stock cylinder or not-I made an assumption in my earlier post regarding sleeves Quote Link to comment Share on other sites More sharing options...
KaN Powersports Posted December 3, 2013 Report Share Posted December 3, 2013 Well with a super wampus, you can just use a big hole saw to bore the top case. no need to split them. Never thought of this-that would be way easier-LMOA Quote Link to comment Share on other sites More sharing options...
strictlycali Posted December 3, 2013 Author Report Share Posted December 3, 2013 THANKS GUYS, I WAS JUST CURIOUS SO LOOKS LIKE IM SPLITTING THE CASES AFTER ALL Quote Link to comment Share on other sites More sharing options...
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