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Differences between Twin SU's

Posted: Fri Feb 15, 2013 5:30 pm
by rolesyboy
Would somebody know the differences between Cooper S and 998 Cooper Twin SU's in detail?
I have countless sets and as far as I can fathom the only difference lies in the vacuum take off on one (half) of the 998 Cooper Cooper Carb. Anything else?? Can they be modified to suit a Cooper S?? Cheers. Mark

Re: Differences between Twin SU's

Posted: Fri Feb 15, 2013 11:24 pm
by jay weinstein
needles,springs and part numbers................use them!!!!!

Re: Differences between Twin SU's

Posted: Sun Feb 17, 2013 11:51 am
by rolesyboy
'Use them....' Have I just been told-off???
What part numbers am I looking for?

Thanks

Re: Differences between Twin SU's

Posted: Sun Feb 17, 2013 7:01 pm
by jay weinstein
sorry....just joking with you part #s on float bowl tops,piston dampner or whatever you want to call them and spell them,color of springs,alum tag on float bowls etc. minor crap

Re: Differences between Twin SU's

Posted: Thu Feb 21, 2013 3:23 pm
by sclemow
While on the subject of twin SU's, can MGB HS4's be used on a mini manifold in a mini?

Cheers

Simon

Re: Differences between Twin SU's

Posted: Thu Feb 21, 2013 3:32 pm
by jay weinstein
can be done using part #12G2464. mk 3 s. i think. you might have to modify the vacume outlets if your running a servo and pcv valve but the bosses are there. jw

Re: Differences between Twin SU's

Posted: Thu Feb 21, 2013 3:59 pm
by sclemow
Thanks Jay.

S

Re: Differences between Twin SU's

Posted: Thu Feb 21, 2013 6:18 pm
by Jack of all trades
There's a difference in the manifolds (because of the connection for the servo), the cooper set-up has indeed a vacuum pick-off (that can be blocked)
And the piston springs of a cooper are the "blue" ones, the S ones are the "red" ones.

Re: Differences between Twin SU's

Posted: Thu Feb 21, 2013 7:06 pm
by jay weinstein
so that's how you spell VACUUM thanx

Re: Differences between Twin SU's

Posted: Thu Feb 21, 2013 9:03 pm
by Spider
jay weinstein wrote:so that's how you spell VACUUM thanx
yeah, it SUX eh?

re: HS4's from MGB - You'll also need different linkages.

Re: Differences between Twin SU's

Posted: Fri Feb 22, 2013 1:30 pm
by Jack of all trades
The ST HS4 manifold is commonly named AEG489 while 12G2464 is one of the variants of that around (that one had the two vacuum holes not drilled at the factory) In essence they are all the same casting as a AEG 573 just a different stud placement.

Just some xtra info...