|
Post by captain chaos on Dec 15, 2013 20:30:12 GMT
More pics. Pics are nice. Oh yes. Plenum now almost complete, headers need welding together. This afternoon we removed the engine for painting.
|
|
|
Post by captain chaos on Dec 15, 2013 20:30:43 GMT
Found this info: "Pressure below the membrane is needed. On the GSXR1100 model 92 with the 40mm carbs you have a seperate “venting” system with external hoses. Those are not suitable to pressurize. I removed that system, plugged the holes and drilled holes from the bellmouth towards under the diafram. When you drill you cross a not used hole. You have to plug that up also to prevent leakage and pressure drop. So it is made like the earlier models: the 36 and 38 mm CV carbs do not have this system." The holes from bellmouth to under the diafram, what size should they be? Or is that not really important? Don't want to drill too big and f*ck up the carbs. Nobody knows the answer?
|
|
|
Post by katana on Dec 16, 2013 19:37:13 GMT
Probably not! 40's weren't the nicest carbs for N/A use so can't imagine many have been modded for use with boost especially as there are better solutions without playing!
|
|
|
Post by captain chaos on Dec 16, 2013 19:55:22 GMT
that's what i was afraid of.
|
|
|
Post by Kristjan on Dec 17, 2013 15:20:00 GMT
I'll ask a friend who might have been dealing with that type of carbs, I'll let you know what he told later this evening when we have finished with changing tyres on his Firebird.
|
|
|
Post by captain chaos on Dec 17, 2013 16:59:55 GMT
I'll ask a friend who might have been dealing with that type of carbs, I'll let you know what he told later this evening when we have finished with changing tyres on his Firebird. Cool, thanks.
|
|
|
Post by Kristjan on Dec 17, 2013 18:21:22 GMT
Well, Raiko said that he has seen 6mm hole used. He has been playing with some turbobikes at work, and he must know something. But I also found another kind of solution. Probably needs reinforcing the rubber T's though, with steel wire or something: www.turbo-bike.com/images/gsx1100rwtic%20web/Ple-forg1.jpgThis is not the way I would prefer to drilling for obvious reasons.
|
|
|
Post by captain chaos on Dec 17, 2013 20:04:36 GMT
that other kind of solution is something else, that's the float bowl pressurising.
On the 40's there's a separate venting system (between carbs 2 and 3) for under the membrane in the top of the carbs. That needs bypassing. 6mm holes your friend says, that's what i also thought would be good.
|
|
|
Post by Kristjan on Dec 18, 2013 16:42:06 GMT
The big tubes with rubber T's that are about to be connected with the plenum on 40s in the picture in my last post are definitely vents below the membrane. Float chamber vents have much smaller hoses and are connected to the white plastic T-piece in engine side of the carbs on that photo.
Float chamber vents will not be connected just into the plenum like that, they should have their pressure from the pitot tube.
|
|
|
Post by captain chaos on Dec 18, 2013 16:54:07 GMT
Ah yes you're right.
|
|
|
Post by duckndive on Dec 22, 2013 18:14:16 GMT
Why not e8ay the 40s and pick up some steel top 34s from an air cooled GS, GSX 1100....
|
|
|
Post by captain chaos on Dec 22, 2013 19:38:05 GMT
Why not e8ay the 40s and pick up some steel top 34s from an air cooled GS, GSX 1100.... that's what i also suggested but he wants to try with the 40's. It was running great N/A so wizzy popped should not cause too many headaches.
|
|
|
Post by captain chaos on Dec 24, 2013 16:49:22 GMT
|
|
|
Post by captain chaos on Jan 5, 2014 20:24:15 GMT
Engine painted and then lunch thrown in the engine today, mounted the headers and carbs and plenum, and changed engine cover bolts for some nice 'n shiney ones. By the way this is the shed where it all happens:
|
|
|
Post by homer711 on Jan 6, 2014 17:33:45 GMT
Very nice work mate. I have those 40's and they seems to be pretty easy to pressurize, just wondering myself that hole size. Keep those, they are newer and probably not so worn as some old 34 or 36 ones.
|
|