87BuickGN Posted March 19, 2015 Report Posted March 19, 2015 Hi, noobie here. How much can the factory jugs be bored before having to be sleeved or scrapped? I have a couple sets of jugs that have bores at 2.580 in diameter. I'm not looking at anything crazy, just wanting to rebuild the motor and get it running. I see there are some wiseco top end sets that run .80 and .100 over. Can the stock jugs go that far? thanks in advance. Quote
Surfrjag Posted March 19, 2015 Report Posted March 19, 2015 Sounds like your at 65.5mm and can easily go to 66mm 66.5 if you have domes to match. If I was you I would find a good local machine shop (call around ) to see if they can do bores that size. They will measure and hopefully be able to tell you if it needs to be bored to 65.75mm Weisco doesnt make a 65.75 piston so unless you dont need a bore or want to go ahead to 66mm. Look into some cast namura pistons. If all else fails send them to a site sponsor and they will get you going.. If I was a site sponsor I would say send them to me and I would get it done. But I am not so I cant.. but I could.. Quote
87BuickGN Posted March 19, 2015 Author Report Posted March 19, 2015 I'm pretty sure I can locate a shop that will be able to cut them that size..... so, how far can the stock jugs be bored to? Quote
do-work-son Posted March 19, 2015 Report Posted March 19, 2015 66.5 if you have domes to match.. Quote
87BuickGN Posted March 19, 2015 Author Report Posted March 19, 2015 ^I'm near buffalo, ny I have some aftermarket domes or cool heads.....I will go check tonight and reply thanks. Quote
Larry's Shee Posted March 20, 2015 Report Posted March 20, 2015 You only want to bore to the size that will clean it up. Not max it out. Quote
pcplatinum21 Posted March 20, 2015 Report Posted March 20, 2015 Will pro designs domes fit a 66mm bore or will big bore domes be needed?? Quote
pcplatinum21 Posted March 20, 2015 Report Posted March 20, 2015 Thank for advice, in process of building a 4 mil stroker for my brother! Appreciate it Quote
Surfrjag Posted March 20, 2015 Report Posted March 20, 2015 You will know if it hits.. ha Smallbore domes will go to 66mm but I had a head once (cant remember brand) that didnt have the dome centered perfectly and it hit. Switched heads and it was fine... Quote
pcplatinum21 Posted March 22, 2015 Report Posted March 22, 2015 its a pro designs cool head with 18cc domes now, im running a spacer plate on a 4mil stoker, they shouldnt hit im just wondering if the gasket around dome will seal Quote
Zillaguy Posted March 22, 2015 Report Posted March 22, 2015 Ditch the spacer plate, and have the porting done for a 4mil, and have proper domes cut. Quote
pcplatinum21 Posted March 22, 2015 Report Posted March 22, 2015 It's o rings, just asking before I put the domes on if domes fit without o ring hanging it's cylinder bore? It's 66mm cylinders Quote
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