gotsand88 Posted September 21, 2015 Report Posted September 21, 2015 What head would be best setup for 4mm hot rods crank with stock cylinders with 69mm big bore? Sent from my iPhone using Tapatalk Quote
Bennett131 Posted September 21, 2015 Report Posted September 21, 2015 With a 69mm bore, I'd imagine you would be cutting it close with pro design style domes. Why the 69mm bore? Quote
BANSHEE HP Posted September 21, 2015 Report Posted September 21, 2015 At 69mm everything is so close it's a real pain to get them to seal Quote
mike0chek Posted September 21, 2015 Report Posted September 21, 2015 may want to look into some newer jugs or a complete 4mm kit Quote
sleeper06 Posted September 21, 2015 Report Posted September 21, 2015 Stock head cut by mull engineering for your intended fuel and a wsm big bore head gasket or copper big bore gasket. Where did you get cylinders and can u post a pic of where the sleeve retaining ring ends up in conjunction to the studs, word of advise, glue the shit outta that head gasket or it will leAk . Quote
Bennett131 Posted September 21, 2015 Report Posted September 21, 2015 may want to look into some newer jugs or a complete 4mm kit Genius! Quote
gotsand88 Posted September 21, 2015 Author Report Posted September 21, 2015 The cylinders had the stock sleeves removed and the cylinders were machines out and big as sleeves were pressed in it was a 68mm but some how the machinist messed up and I had to go to 69mm lost my business on that one but and the sleeve is right on the stud I'll get pics as soon as I can. Knowing what I know now I wish I would have went with a serval kit but I'm going to run this setup till it blows. I've got a trinity head on it now and started leaking again this weekend I've seen those mull heads if that's what it needs I'll buy it today Sent from my iPhone using Tapatalk Quote
trickedcarbine Posted September 21, 2015 Report Posted September 21, 2015 Definitely a stock cut head or some sort of single piece bottom without removable domes. It'll be a bitch to seal up. TDR had nice choices in metallic gaskets. Quote
gotsand88 Posted September 21, 2015 Author Report Posted September 21, 2015 Why is it that it will be a bitch to seal? Sent from my iPhone using Tapatalk Quote
trickedcarbine Posted September 21, 2015 Report Posted September 21, 2015 Because once you get out past 68mm on a stock stud configuration, there isn't much of a sealing surface. Quote
67banshee01 Posted September 25, 2015 Report Posted September 25, 2015 have someone cut your stock head. I have mine which was previously machined .30 and my builder was able to cut it to accommodate the +4 crank. was at little sahara Ut. running a solid 155 in each cylinder. Quote
mike0chek Posted September 25, 2015 Report Posted September 25, 2015 Genius! get a life dude really Quote
xbig pitax Posted September 26, 2015 Report Posted September 26, 2015 I've had up to a 70mm piston on a stock cylinder and have gotten it to seal perfect and I trail ride the piss out of it and race it. Factory head cut for the size and a Tdr head gasket. Or a trinity head with 70mm domes both work the same. Quote
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