carb # on SU 'HS4' series

The MG Experience ~ MGB & GT Forum ~ Archives

MG MGB and MGB GT Tech Talk

If you would like to post a reply, please click below to visit the The MG Experience Forums:
MGB & GT Forum: carb # on SU 'HS4' series
http://www.mgexperience.net/phorum/read.php?1,569060

Join the discussion, post your photos, or ask your own questions. Membership is FREE!




May 28, 2007 14:58:07
1000M.CT

I've had my MG running but it is really running bad and my guru (father-in-law) thinks I should clean the carbs out. I would like to replace the needle and my VB catalog requires the carb#. My needle looks like #7 but the catalog says I need #8.

Could you help me please find the carb number? Thanks alot.

Bruce

May 28, 2007 15:01:46
B-racer

It should be stamped on a small aluminum tag that's held in place with one of the float bowl cover screws. There should be one on the front and one on the rear. What year make and model car requires a #8?





May 28, 2007 15:19:02
1000M.CT

It says a 69 MGB and is AUD 326.

May 28, 2007 16:04:37
JimmyHilton

A '69 with AUD 326 would have had AAE as standard. It would be really rare that the jet needles were so bad as to create a "bad" running condition. They may not be optimal, but you could adjust for a decent idle.

May 28, 2007 16:12:57
tomkatb

Before you touch the carbs look for vacuum leaks. The carbs seldom need attention.

Explore for leaks first and check out the dizzy carefully first. Then do it again.

larry

May 28, 2007 16:29:57
JNickell

Maybe he said lean out the carbs.

May 29, 2007 05:06:43
Speedracer

1000M.CT Wrote:

Quote: "
My needle looks like #7 but the catalog says I need #8. "


Finding the carb number may only lead you further astray, as Jimmy mentioned AAE are stock for your carbs which is a biased or spring needle, but who's to say someone hasn't changed your carbs out to the the earlier fixed needle carbs or even converted your biased needle carbs to fixed needle carb with the fixed needle adapters, the number 7 needle you are talking of is two steps richer than stock, the fixed needle MGB stock needle is #5. I suggest you forget calling VB, and call someone who actually knows what they are talking about and order from them, like Joe Curto. <http://www.joecurto.com>

This is an archived discussion from the The MG Experience Forums

If you would like to post a reply, please click below to visit the The MG Experience Forums:
MGB & GT Forum: carb # on SU 'HS4' series


Archive Index | The MG Experience Forums | Return to The MG Experience