HiF 44 SU carb question

Post by **bmcecosse** » Fri Sep 16, 2005 9:13 pm

Does the mixture screw go IN to weaken the mix, or OUT ?? Does it actually wind the jet up and down just like the traditional old carb ?

Post by **moschops** » Fri Sep 16, 2005 10:15 pm

Used to run with one of those on my old 1275GT a few years back. IIRC, screw it in to richen it, and out to lean it off.

Post by **Packedup** » Fri Sep 16, 2005 10:40 pm

I can't remember off the top of my head which way is what, but yes, it does still move the jet up and down

Post by **Cam** » Fri Sep 16, 2005 11:17 pm

Yes, the jet does move up and down like the 'traditional' type so you can figure it out from there but from memory I agree, I think screwing in (clockwise) richens and screwing out (anti-clockwise) leans.

Post by **Packedup** » Fri Sep 16, 2005 11:59 pm

Just checked my Metro Haynes, and yep, the above (in for rich, out for weak) is spot on

Post by **bmcecosse** » Sun Sep 18, 2005 9:14 pm

Thanks lads - indeed I have since read my Metro Haynes too (best gerabox build description of any Haynes in there!) and indeed it is in for rich and out for weak. Anyone got any suggestions for a needle to use on a reasonably well modified 1275 with this carb ?

Post by **moschops** » Mon Sep 19, 2005 10:14 am

BDK for a stage 1 1275, BDL if it's a bit wilder.

There is a website out there somewhere that lists them all, and what they're used in/for, but I'm buggered if I can find it now.

Post by **Cam** » Mon Sep 19, 2005 10:39 am

BBZ if it's a highly strung 1380...

Post by **Onne** » Mon Sep 19, 2005 5:41 pm

www.burlen.co.uk if I my memeory is correct

Post by **bmcecosse** » Mon Sep 19, 2005 10:38 pm

I think it may be WINSU you are thinking of. The car runs well at the moment using the BEJ needle the carb came with - and yes the BDL is the standard MG Metro needle - much the same profile to half way and then it goes much richer. I may just experiment with the leccy drill, wet and dry paper and a micrometer !

Post by **Onne** » Mon Sep 19, 2005 10:41 pm

burlen do all the SU stuff, don't they?

Post by **bmcecosse** » Mon Sep 19, 2005 10:46 pm

Yes they will sell all the parts - but I am a miserable Scotsman who spends not a single penny unless forced to at gun point !

Post by **Onne** » Tue Sep 20, 2005 6:43 am

sorry forgot that