Metering Needles - Bob Jeffery
Re metering needles for Stromberg carburettors - in particular the 175CD as once fitted to the Rover SD1 V8. I am aware that numerous different needle profiles are available to tune an engine for different applications. Does anyone out there have, or know where I can get any info on how the reference no.s relate to needle profile? (Typical ref. no's are B1FB, B1EN, B2AS, etc. etc.)
Re: Metering Needles - David Woollard
Bob,

I have a brilliant book with all of this in for SU carbs. Right down to setting up the needles for a one-off engine.

Wonder if they do the same for the Stromberg.

Try searching on the net for Brooklands Books. They may have something.

David
Re: Metering Needles - Alvin Booth
Does any of you know what SU stands for,
And the reason,
Prize for the first one to know.

ALvin
Re: Metering Needles - Darcy Kitchin
Alvin

I've often wondered that.

When are you going to tell, you tease?
Re: Metering Needles - Alvin Booth
Darcy,
I'll tell you but no-one else.
It stands for Skinners Union.
And it goes back to when leather was used as the diagphram on their early carbs.
keep it to yourself Darcy.

Alvin
Re: Metering Needles - Mark (Brazil)
Try this - there is a Haynes book which would seem to tell you what you want to knowm


www.aptfast.com/apt_parts/books/book_info/book-10_...m
Re: Metering Needles - Alex. L. Dick
If you have never played with a collection of needles for an Amal remote needle carb, trying to get maximum noise but marginally driveable on the road, you have not lived - especially with as many throttle slides with different cutaways.

My, this site stirs memories!

Salu, Alex.
Re: Metering Needles - Andrew Moorey (Tune-Up Ltd.)
Most knowledgeable people I know for this sort of info are Southern Carbs and Injection 0208 540 2723. I used to have a table for the SU needles, now long since lost!
Good luck

ps Thanks for your email DW
Re: Metering Needles - Ian Cook
One problem to watch for on the later SUs and Strombergs is that the jet wears and cannot be replaced. I remember a Maxi with excessive fuel consumption and no amount of fiddling with the neede (including fitting a new one) did any good. In this carb, though, it was possible to renew the jet and it worked wonders.

If you dismantle the top of your carb(s) you should be able to view the jet(s) with an eyeglass and if the bore looks oval you will have a problem
Re: Metering Needles - John Slaughter
Ian

Good point. The problem is the sprung biased needles used, allegedly to improve fuel vapourisation. Easily checked - if the needle moves against a spring in the piston unit, rather than being solid, it could wear the jet. The wear is also sometimes apparent on the side of the needle. Brings back memories of my Range Rover. As for spares availability, always try the carburettor maker or specialists. They very often can supply the parts that the car dealer will claim are not available.

egards

john
 

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