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Old 8th June 2010, 21:53   #61
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Default Troublesome SU Carb. A DIY

Most of the mechanical work are done as on date, inspite of slow progress, the only thing thats troubling us is the Original SU carb.

Even the so called Experienced mechanic also is unable to fix the issue.

So fed-up of the whole drama, i myself removed the Carb from the manifold today and have got it home.

And....! What am i going to do with the SU carb........

I intend to use my acquired skills off-late and some search on the WWW., i am going to get this thing working.

I sit and analyse the main issue,

1) When we start the car, the engine races well
2) It does not hold well at Idle

Some pics of the Carb
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Old 8th June 2010, 23:00   #62
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Seems like your mechanic is not being able to set the carb properly. Try and do it your self otherwise get in a overhauling kit for it.
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Old 9th June 2010, 00:19   #63
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Quote:
Originally Posted by PAVAN KADAM View Post
Most of the mechanical work are done as on date, inspite of slow progress, the only thing thats troubling us is the Original SU carb.

Even the so called Experienced mechanic also is unable to fix the issue.

So fed-up of the whole drama, i myself removed the Carb from the manifold today and have got it home.

And....! What am i going to do with the SU carb........

I intend to use my acquired skills off-late and some search on the WWW., i am going to get this thing working.

I sit and analyse the main issue,

1) When we start the car, the engine races well
2) It does not hold well at Idle

Some pics of the Carb
Quote:
Originally Posted by IndrojitSircar View Post
Seems like your mechanic is not being able to set the carb properly. Try and do it your self otherwise get in a overhauling kit for it.
Indrojit, Pavan!! Hi! Indrojit, you state the obvious. Pavans mechanic is not being able to set the carb properly. Now what advise do you offer Pawan? None.

Pawan, I want to share an experience with you, maybe you have a similar problem. Many have seen pics or heard about me and my green Amby being a daily driver. Well, a few moons ago, I had obtained a SU carb meant for the early Amby/Landmaster series with a suitable manifold. This ran well for a while, till my carb needed an overhaul. Try as we did, we could not get a proper kit with suitable needle and pin. This was not even available in UK. So finally I put back the original Carb and manifold. You can only try to get an original and good kit from UK. Otherwise, most likely you are doomed. Been there, done that, and hoping my experience will help you.

Cheers harit
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Old 9th June 2010, 00:28   #64
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Originally Posted by harit View Post
Indrojit, Pavan!! Hi! Indrojit, you state the obvious. Pavans mechanic is not being able to set the carb properly. Now what advise do you offer Pawan? None.

Cheers harit

Sir I think we should let him do it his way and if it doesn't work then there is always advice to give. So why not let a person try in the first instance ?
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Old 9th June 2010, 10:59   #65
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Quote:
Originally Posted by harit View Post
Indrojit, Pavan!! Hi! Indrojit, you state the obvious. Pavans mechanic is not being able to set the carb properly. Now what advise do you offer Pawan? None.

Pawan, I want to share an experience with you, maybe you have a similar problem. Many have seen pics or heard about me and my green Amby being a daily driver. Well, a few moons ago, I had obtained a SU carb meant for the early Amby/Landmaster series with a suitable manifold. This ran well for a while, till my carb needed an overhaul. Try as we did, we could not get a proper kit with suitable needle and pin. This was not even available in UK. So finally I put back the original Carb and manifold. You can only try to get an original and good kit from UK. Otherwise, most likely you are doomed. Been there, done that, and hoping my experience will help you.

Cheers harit
Quote:
Originally Posted by IndrojitSircar View Post
Sir I think we should let him do it his way and if it doesn't work then there is always advice to give. So why not let a person try in the first instance ?

Dont get worked up Guys I am on my Work.

Dismantled the Carb, Found the needle float not floating as it actually should. On the high rev point, the Float is getting stuck on Top and at cold start, the needle is getting stuck at the bottom

Got a bit of Steelwool , mixed it with Glass wool (40-60%) and started shaving off the rough edges if there are. I might take it to the lathe and get them polished or Buff it.

What Oil should i Use at the TOP? Presently have put a bit of Engine oil, i feel its wrong, it says USE THIN OIL EVERY MONTH
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Old 14th June 2010, 13:51   #66
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Quote:
Originally Posted by PAVAN KADAM View Post
Dont get worked up Guys I am on my Work.

Dismantled the Carb, Found the needle float not floating as it actually should. On the high rev point, the Float is getting stuck on Top and at cold start, the needle is getting stuck at the bottom

Got a bit of Steelwool , mixed it with Glass wool (40-60%) and started shaving off the rough edges if there are. I might take it to the lathe and get them polished or Buff it.

What Oil should i Use at the TOP? Presently have put a bit of Engine oil, i feel its wrong, it says USE THIN OIL EVERY MONTH
I found some online resource SU Carburetor and one nice PDF, hope it is of use to you

Damper Oil Tech Information (this one on Damper oil)

Su Carburetor Su Carburetor | PDF Articles (this one for more resources)

SU Caburetor Notes (this one very detailed info on SU Carbs)

SU carburetors and adjusting SUs (this on tune up and adjustment)

These two PDF are worth reading

SU CARBURETORSrev.pdf

sucarburetorschematic.pdf

Hope this of use to you.

Last edited by manishalive : 14th June 2010 at 13:52.
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Old 21st June 2010, 19:05   #67
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Thank you Manish

Finally after 2 days of DIY found the real trouble maker.

The Idle float needle is fabricated sometime back and its diameter is just a bit more than what it should be.

Taking this to the lathe tomorrow to get it polished a bit to loose some overall diameter.

Hope this solves the trouble.
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Old 24th June 2010, 20:41   #68
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Quote:
Originally Posted by PAVAN KADAM View Post
Thank you Manish

Finally after 2 days of DIY found the real trouble maker.

The Idle float needle is fabricated sometime back and its diameter is just a bit more than what it should be.

Taking this to the lathe tomorrow to get it polished a bit to loose some overall diameter.

Hope this solves the trouble.
Hello Sir,

I read the entire thread, just waiting ur carb to crank after coming from lathe. Please let me know if you need any help which needs to be done from lathe shop have couple of friends in ShivajiNagar.

Regards,
Saleem
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Old 27th June 2010, 15:42   #69
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www.morrisminorspares.co.uk

Treat yourself with a carb rebuild kit from the above website and you are done for another 50 years!

Last edited by GTO : 12th July 2010 at 10:37. Reason: Removing FONT Tags. Please do NOT cut-copy-paste text from other word softwares. It results in a formatting error.
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Old 29th June 2010, 23:54   #70
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Originally Posted by beetle_boy View Post
Hello Sir,

I read the entire thread, just waiting ur carb to crank after coming from lathe. Please let me know if you need any help which needs to be done from lathe shop have couple of friends in ShivajiNagar.

Regards,
Saleem
Thank you very much for you help. Will certainly take your help if needed.

Quote:
Originally Posted by razaksyed View Post
[COLOR=#0e774a]www.morrisminorspares.co.uk[/COLOR]

[COLOR=#0e774a]Treat yourself with a carb rebuild kit from the above website and you are done for another 50 years![/COLOR]
Looks like , i need to do that.

But since i've already done a bit of work, hope it fires well.

Luckily many of my DIY's have been successful
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Old 1st July 2010, 12:21   #71
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Thanks to Manishalive

I got a book which says how to tune a SU Carb
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Old 2nd July 2010, 16:26   #72
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The book Manishalive gave me helped a lot.

And C.S.Ananth sir has offered to help me with the carb set-up

Would be meeting him tomorrow.

Meanwhile, snails pace work is carried out on the car.
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Old 8th July 2010, 14:57   #73
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Hello Pavan,

What's happening with this project?
One week without updates is too long for such a wonderful restoration job.
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Old 11th July 2010, 15:20   #74
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Hey Pawan ,HOw many projects are you handling at this point of time .Appreciate your patience !!

A Fiat , Morris Minor , and what else is there in pipeline?

BTW whats the status of this beauty
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Old 11th July 2010, 16:28   #75
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Quote:
Originally Posted by ch.nathan View Post
Hello Pavan,

What's happening with this project?
One week without updates is too long for such a wonderful restoration job.
Blame it on the Mechanic firstly and the monsoon, This is the Second season, and still the car is not yet ready.

This will be the First and the last restoration for which i will be utilising this particular mechanics service.

Quote:
Originally Posted by joshguy View Post
Hey Pawan ,HOw many projects are you handling at this point of time .Appreciate your patience !!

A Fiat , Morris Minor , and what else is there in pipeline?

BTW whats the status of this beauty

Around 6 projects around me every time buddy. (ha ha....)

Presently

1) Painting complete
2) Electricals 90% done
3) Brakes 100% done
4) Suspension 90% done
5) Cosmetics 75% done
6) Carb 99% done
7) Upholstery 0%

I have the carb almost ready, will be installing it on the car and hopefully by next wednesday will be taking it out for a trial.
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