uwenr Posted December 16, 2008 Report Share Posted December 16, 2008 I want to build a sleeper with big bore sleeves in a stock cylinder. Ive seen a few online, vitos 68mm, LA sleeve 68mm, Trinity 72mm. Quote Link to comment Share on other sites More sharing options...
KEVSWS6 Posted December 16, 2008 Report Share Posted December 16, 2008 I never had a problem with them overheating but could never get a cost per horse power ratio I wanted out of them. I think 4 and 7 mil cranks in the stock sleeves and head do real well for a sleeper. Cost per horse power ratio is worth that build. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 16, 2008 Report Share Posted December 16, 2008 (edited) I want to build a sleeper with big bore sleeves in a stock cylinder. Ive seen a few online, vitos 68mm, LA sleeve 68mm, Trinity 72mm. Here's the problem.... When you get bigger sleeves in the stockers, you are very limited to how much the transfers can flow.... 68mm is as big as I'd go in stockers. Vitos has a new line of cylinders that "look" very stock...only a close inspection will give it away... However, they need to be ported, just like a sleeved OEM cylinder would have to be. I would think about a bigger stroke crank faster than I would a bigger bore. I would look into who can build you a 10mm stroker with a sleeve and stock head. The sleeve actually runs up into the head...and the head is cut/recessed accordingly. Very few people can get it to work and work well...but that is a better option. If not...a 4 mil with stock cylinders is very doable...as well as getting the head cut, you will NOT be able to tell from looking on the outside either. Edit ** Kevin beat me to it...great minds think alike...LOL Edited December 16, 2008 by dajogejr Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted December 16, 2008 Report Share Posted December 16, 2008 68mm is as big as I'd go in stockers. Thoes are the ones I have. First bore is 66mm last bore is 68mm. I can see where those huge sleeves choak the transfers, but the ones I have are not really noticeable. I bought my 4mill cylinders ported but they needed to be resleeved due to a cracked sleeve. I got the cylinders for a really good price. I have about $450 in the cylinders. Like the guys said it isnt cost effective if you have to pay for a port job then pay for the resleeve. Quote Link to comment Share on other sites More sharing options...
uwenr Posted December 16, 2008 Author Report Share Posted December 16, 2008 Here's the problem....When you get bigger sleeves in the stockers, you are very limited to how much the transfers can flow.... 68mm is as big as I'd go in stockers. Vitos has a new line of cylinders that "look" very stock...only a close inspection will give it away... However, they need to be ported, just like a sleeved OEM cylinder would have to be. I would think about a bigger stroke crank faster than I would a bigger bore. I would look into who can build you a 10mm stroker with a sleeve and stock head. The sleeve actually runs up into the head...and the head is cut/recessed accordingly. Very few people can get it to work and work well...but that is a better option. If not...a 4 mil with stock cylinders is very doable...as well as getting the head cut, you will NOT be able to tell from looking on the outside either. Edit ** Kevin beat me to it...great minds think alike...LOL My builder has built a 10 mil stock cylinder, I didnt like the way it looked. You could tell easily that it had been modified. Im currently running a 7 mil crank 66mm pistons in stock cylinders with the head chambered. I was thinking the 7 mil crank with a bigger bore should move me to like a 443. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 16, 2008 Report Share Posted December 16, 2008 My builder has built a 10 mil stock cylinder, I didnt like the way it looked. You could tell easily that it had been modified. Im currently running a 7 mil crank 66mm pistons in stock cylinders with the head chambered. I was thinking the 7 mil crank with a bigger bore should move me to like a 443. To be 100% honest, I don't think you'll gain much HP going from a 66 to say...68mm. Again, if you welded the transfers for more room...sure. But, you don't want that look. I've seen a 10mm setup you couldn't even tell from the outside. The sleeve of the 10mm I've seen goes WAY up into the head...but, you can't tell from the outside. You're at or near the limit of stockers...the HP per dollar spent going forwards isn't very enticing to be honest.... Are you already on methanol, lockup, override? Quote Link to comment Share on other sites More sharing options...
uwenr Posted December 16, 2008 Author Report Share Posted December 16, 2008 (edited) To be 100% honest, I don't think you'll gain much HP going from a 66 to say...68mm. Again, if you welded the transfers for more room...sure. But, you don't want that look.I've seen a 10mm setup you couldn't even tell from the outside. The sleeve of the 10mm I've seen goes WAY up into the head...but, you can't tell from the outside. You're at or near the limit of stockers...the HP per dollar spent going forwards isn't very enticing to be honest.... Are you already on methanol, lockup, override? Ya, 7 Mil billet crank, 2-5 override, DD lockup 750 friction plates, 39mm keihins on alky CPI big bore pipes. I would try the 10 but I already have the 7 crank Edited December 16, 2008 by uwenr Quote Link to comment Share on other sites More sharing options...
uwenr Posted December 16, 2008 Author Report Share Posted December 16, 2008 What do yuo think about these http://cgi.ebay.com/ebaymotors/ws/eBayISAP...em=250343684296 Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 16, 2008 Report Share Posted December 16, 2008 (edited) To be honest... Anyone in the game would know those are not stock cylinders. 5mm higher deck height (since the sleeve is flush with the deck) is noticeable...and something about the exhaust side doesn't look right, like more is added (no doubt for a triple exhaust port)... And with a 535cc motor...anyone you pull a half track on with a true 350 motor is going to know....you simply can't make that up. Sleeper and Cheater run hand in hand....if heads up classes in an organized race with money on the line were in play, I would call you out. For dune and play racing with your bros....knock 'em dead. If you tried to run that in my class at Planet Sand, I'd definately call you out.....LOL. Edited December 16, 2008 by dajogejr Quote Link to comment Share on other sites More sharing options...
uwenr Posted December 16, 2008 Author Report Share Posted December 16, 2008 Thanks, yeah I only race with friends at the dunes or at the river bottom nothing serious. Just looking for just a bit more, my bike already beats the cheetah 4 mils. I think I will just suck it up and get a cub for my 7 mil crank. Can you run a stock head on a super cub or is the head bolts to far apart? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 16, 2008 Report Share Posted December 16, 2008 Different Head. I know Dave Noss makes one... White Knuckle Might... They're an odd bird, and I don't think the super cubs took off real, real well. I still don't think they're worth the cost of a new head and boring the cases vs. a well tuned cub. Quote Link to comment Share on other sites More sharing options...
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