has any one got this combo has anyone got twin 1 3/4 in SU's on a 1275 if so how does it go what needles

have just ordered a set of twin 1 3/4

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Ruling the bends and bending the rules since 1959

I ve run twin 1&3/4 carbs on my big bore donks for years, love em

I would just shove some OA6 needles & a pair of red springs in there for starters & go from there

it all depends on so many other variables as to what you may end up with on your particular engine,,, but the OA6s & reds will get you going without a hic-up & will be all wonderful to start with

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

I run RR needles with red springs... Think i selected them as that is what was sudgested in vizards book..

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I use 13/4 SU's on my 1360 which is in a fairly high state of tune.
I really couldn't recomend them on a stocker or even a mild motor though.
Red springs and KW needles work for me.
As matt says OA6 is a great starting point!
Dave

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each piston in the engine only sees one carb anyway,,, so a stock 1275 running around on a single 1&3/4 is quite fine,,, then twins is just the same only with less manifold restriction

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

this a hijack so i appolgise in advance

twin 1.5 Su with a re13 cam

Needles would be

Ta in advance

#6 worked for me in Barney, 1293cc, twin HS4s, cam was a Wade 104 with 1.5 rockers (so similar lift and timing to an RE13 and stock rockers).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Did the same-but also got it set up on a dyno.
Also just as important is your inlet manifold and filter set-up.
I'm running with K&N Filters now with Maniflow manifold setup for 1 3/4.

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