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MG Midget and Sprite Technical - SU Carb set-up

Hi

Anyone got some tips please on set up of SU Carbs after rebuild?

What baseline setting should I use for the throttle screw? (1.5 turns in?)

This follows a carb rebuild including putting in the correct needles (replacing two different ones, neither listed for the car) and replacing one carb body due to broken casting (PO).

Twin 1 1/4 inch HS2 on a 948cc Sprite.

I have got the car running, but not sure on the throttle screw setting and daftly fiddled with that and now not running properly ... doh. I was doing another job, and had not read up on carbs for a while (this is a very long term rebuild)

Cheers
Mike


PS I have seen the HS general and tuning advice on Burlen website, but not found advice on initial carb setting for throttle screw.
M Wood

Mike if it helps you I can mail you my SU manual to borrow/photocopy at your leisure.
😎
Greybeard

Mike,
isn't it covered in the Driver's Handbook(?) - if not does the SU Burlen website have such info (?sorry I can't remember at the moment - or about much else it seems).
Nigel Atkins

This from my 1275 DH -

(paragraph 18 to follow)


Nigel Atkins

paragraph 18 -

Nigel Atkins

Mike. I rebuilt mine using standard AN needles and new jets. With the suction cambers off I brought the jets level and flush with the bridge and then dropped them down 60 thou..good starting point
David Cox

Thanks everyone, that is very helpful.

NIgel - there is some info in the MkII Sprite Driver's Handbook.

Grey - thanks for such a kind offer, that would be great. I am on Mike followed by the thing that rhymes with SPOT mikewood then the thing that rhymes with CAT gmail followed by SPOT rhyming word com

Cheers
Mike
M Wood

On it Mike.
Greybeard

This thread was discussed between 09/06/2019 and 15/06/2019

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