JUSTWANNARACE Posted May 9, 2018 Report Share Posted May 9, 2018 2 minutes ago, Ayesully810 said: haha wow. thats a lot of work, I figured lots of welding i could tell from looking at the cyls that have been welded on a ton. how do these compare to a 10 serv or cub as far as how they ride? Cub or serval is going to make more power all the way through on most of those old builds(there where some over achievers that would walk on a cub of the same size, but very few) problem with the old school stuff is limited transfer volume. They would also break out around the outer rear cyl studs. And crack around the transfer ports. But in the day that's what you had to do to be the fastest on the hill.. Quote Link to comment Share on other sites More sharing options...
gusto Posted May 10, 2018 Report Share Posted May 10, 2018 This is a cool thread. That’s all Quote Link to comment Share on other sites More sharing options...
bricktop2011 Posted May 10, 2018 Author Report Share Posted May 10, 2018 19 hours ago, gusto said: This is a cool thread. That’s all A few pics of the 10mil X 72mm. Cylinder appears to be sleeved with O-ring cut in. Piston is 423P6 72.5mm jetski piston Bottom of the head, showing chamber width Top of head showing closeness of inner holes Approximate center to center spacing of head studs Piston protrudes from deck approx 1mm at TDC. BDC and ports Quote Link to comment Share on other sites More sharing options...
Ayesully810 Posted May 10, 2018 Report Share Posted May 10, 2018 dang you think with all that welding and stuff they did they might as well as made it a triple exhaust port while they were in there lol Quote Link to comment Share on other sites More sharing options...
gusto Posted May 10, 2018 Report Share Posted May 10, 2018 Wow that's a lot of time and effort to make that cylinder! Thanks for the pictures. Do you know if the builder of this engine is still doing banshee work? Quote Link to comment Share on other sites More sharing options...
Ayesully810 Posted May 10, 2018 Report Share Posted May 10, 2018 apparently this is Chad from Holeshot racing https://www.google.com/search?q=july+1991+dirtwheels+magazine&source=lnms&tbm=isch&sa=X&ved=0ahUKEwijzaXhnfzaAhXixYMKHQY2AfUQ_AUICygC&biw=1440&bih=769#imgrc=86rS-p6kjwMx9M: Quote Link to comment Share on other sites More sharing options...
JUSTWANNARACE Posted May 11, 2018 Report Share Posted May 11, 2018 Chad spent some time in the pokey but he is around and does some work here and there. And yes that is chad on the cover of that dirt wheels. Chad started with Jim duncan(JD racing) then when out on his own later after jim got out. I have actually set up quite a few of those in the past myself. Alot of time and work. Matter of fact I still have a few sets of sleeves to do that setup. People didnt start doing triple ports till the late 90s early 2000s.. you can make as much if not more power with a properly ported single exhaust it's just hard on pistons cause it wants to shove the piston through the exhaust port. Quote Link to comment Share on other sites More sharing options...
JUSTWANNARACE Posted May 11, 2018 Report Share Posted May 11, 2018 (edited) And I almost bet if he took a pic of the intake side it doesnt look like a stock banshee cyl either, more like a 250r style intake (cub style), lots of welding and porting on the intake side also. Or, being chad did it, it may be an oval port intake. But that one I would bet more on the 250r style. Geez the work we used to have to do to go fast..lol Edited May 11, 2018 by JUSTWANNARACE Quote Link to comment Share on other sites More sharing options...
gusto Posted May 11, 2018 Report Share Posted May 11, 2018 Great and interesting info JWR! Quote Link to comment Share on other sites More sharing options...
Ayesully810 Posted May 11, 2018 Report Share Posted May 11, 2018 (edited) This makes me feel so young haha hey brick top you should pop those reeds out and snap a pic of the intakes im curious now. Edited May 11, 2018 by Ayesully810 Quote Link to comment Share on other sites More sharing options...
bricktop2011 Posted May 11, 2018 Author Report Share Posted May 11, 2018 13 hours ago, Ayesully810 said: This makes me feel so young haha hey brick top you should pop those reeds out and snap a pic of the intakes im curious now. Sure thing. I should be able to get to them in the next day or so. So back to my problem, I am thinking a cool head would be impossible, probably never find one to fit the stud spacing, and I don't think its a good idea to try and seal an O-Ring against another O-ring. Re working the chambers sounds correct, and I left a message for Louie, but have not heard anything back yet. For a less permanent solution. how about a thick gasket or machined spacer between the head and cylinder? Is that a reasonable idea? I read that once Vitos made a 2mm plate, but I don't know if that would be thick enough or would even seal with an O-ring on one side but not the other. Thanks again for the great info guys, here is that pic with Chad. Has anyone ever attempted to scan and archive those old Dirt Wheels magazines? Quote Link to comment Share on other sites More sharing options...
ginger Posted May 11, 2018 Report Share Posted May 11, 2018 the problem with the spacer is it will cause a place for it to leak. Not sure if they make a thicker head gasket but you could get by some with that. i dont think it will be enough to bring you down to pump gas range. Quote Link to comment Share on other sites More sharing options...
JUSTWANNARACE Posted May 12, 2018 Report Share Posted May 12, 2018 9 hours ago, bricktop2011 said: Sure thing. I should be able to get to them in the next day or so. So back to my problem, I am thinking a cool head would be impossible, probably never find one to fit the stud spacing, and I don't think its a good idea to try and seal an O-Ring against another O-ring. Re working the chambers sounds correct, and I left a message for Louie, but have not heard anything back yet. For a less permanent solution. how about a thick gasket or machined spacer between the head and cylinder? Is that a reasonable idea? I read that once Vitos made a 2mm plate, but I don't know if that would be thick enough or would even seal with an O-ring on one side but not the other. Thanks again for the great info guys, here is that pic with Chad. Has anyone ever attempted to scan and archive those old Dirt Wheels magazines? Shoot me your name and # and I'll send loiue a text and ask him to get ahold of you on monday Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted May 12, 2018 Report Share Posted May 12, 2018 Holly fucking old skool cool!!!!! Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted May 12, 2018 Report Share Posted May 12, 2018 15-20 years ago, this thing was cutting edge. It belongs in a 90's neon themed machine. Way cool for an old stock cylinder set up. I've still got my old 7mm big bore stockers and just can't seem to justify the cost to get them set up again. Quote Link to comment Share on other sites More sharing options...
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