sheerider11 Posted March 8, 2015 Report Posted March 8, 2015 im confused i was told that i could use ordinary cool head domesNo. 4 mm of extra strok. 2 up and 2 down. Your piston would smash the head. So a builder will cut new domes with a recess for the piston and new angle/band/cc for your setup. Pipes porting riding style all play a part in this design. And depending on the porting, you can report for a 4 mil. A trail/mx port can probably be done. Quote
Darkblade Posted March 8, 2015 Report Posted March 8, 2015 No. 4 mm of extra strok. 2 up and 2 down. Your piston would smash the head. So a builder will cut new domes with a recess for the piston and new angle/band/cc for your setup. Pipes porting riding style all play a part in this design. And depending on the porting, you can report for a 4 mil. A trail/mx port can probably be done. where do i get some domes cut Quote
Darkblade Posted March 8, 2015 Report Posted March 8, 2015 Ffs. What an afro rigged engine. No. 4 mm of extra strok. 2 up and 2 down. Your piston would smash the head. So a builder will cut new domes with a recess for the piston and new angle/band/cc for your setup. Pipes porting riding style all play a part in this design. And depending on the porting, you can report for a 4 mil. A trail/mx port can probably be done. my cylinders have a sport port with a boyessen port beside the boost port Quote
sheerider11 Posted March 8, 2015 Report Posted March 8, 2015 where do i get some domes cutYou call an engine builder. That's why I said that from the get go. Quote
Deadbeat Posted March 9, 2015 Report Posted March 9, 2015 who says its even a 4mm...oh right this guy with the sport port and a boysen ports and boost ports lmao Quote
trickedcarbine Posted March 9, 2015 Report Posted March 9, 2015 Call Dave at Noss Machine. Know your deck height. Quick google search will show ya a few ways to get it real quick. You can't just use shelf domes unless the jugs are on a spacer plate. Even then, a set of domes from a plethora of reputable guys will/should out perform regular pro design domes. 1 Quote
sleeper06 Posted March 9, 2015 Report Posted March 9, 2015 23-24cc 4 mill domes call fast racing, I would say post pics of the top of Pistons and a pic showing the connecting rod number, and big end rod pin .020 base gaskets, new oring kit with new copper washers, without measuring porting dimensions myself it would be hard to tell if 23-24 would be best for 91, good luck people replied here that have no fucking clue 1 Quote
totalimpact Posted March 10, 2015 Report Posted March 10, 2015 he might have been sold one of those jerry/jimmy rigged kits that comes with the 4mm thick base spacer that goes under the cylinders, in that case you wouldnt need domes cut for 4mm - but this is a crap way to do it, it screws up the port levels completely, motor will be all out of wack and probably make a bit of low end power with a huge loss on mid-top end. Most engine builders charge $70-90 for the proper 4mm domes, check through the sponsor page to see if any are near you and maybe you can show them what you got - http://www.bansheehq.com/bansheehq-sponsors/ I took mine to HJR, Kevin did a beautiful job setting up my 4mil, its exactly what I asked for, smooth power all through the band at a very reasonable price. Quote
trickedcarbine Posted March 10, 2015 Report Posted March 10, 2015 he might have been sold one of those jerry/jimmy rigged kits that comes with the 4mm thick base spacer that goes under the cylinders, in that case you wouldnt need domes cut for 4mm - but this is a crap way to do it, it screws up the port levels completely, motor will be all out of wack and probably make a bit of low end power with a huge loss on mid-topAren't you lost. You're close if totally backward counts. Quote
Darkblade Posted April 14, 2015 Report Posted April 14, 2015 i am 600 above sea level i only have access to 93 octane fuel what size cool head domes should i run Quote
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