Strip & rebuilding my Group A carb advice

Any advice/tips (apart from replacing it with a standard one) :D
ill strip/clean and put it back together with new gasket etc,
Ive Noticed it floods & leaks a bit from the Accelerator pump.

im going to check the diaphragm, try a 1.22 & 1.25 Main jet instead of the current 1.30
as it runs so rich im constantly getting black soot out the Exhaust..

Any advice tips wil be highly appreciated peeps :)

Feel free to pop round for a cuppa and help :niceone:

Check the rest of the jets for there sizes, once you cleaned it all thoroughly and put it on car check the AFR's and adjust jet sizes to suit boost your running

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Originally Posted by Markey Mark (BD)

Check the rest of the jets for there sizes, once you cleaned it all thoroughly and put it on car check the AFR's and adjust jet sizes to suit boost your running

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Cheers Mark,
My AFR is in the post :D,
Wallace is going to solder it in to the downpipe for me.

I have several new Jets 1.22 1.25 1.30 etc..
Think maybe the 1.30 is too big.
Is it true that they can soldered down in size?
Stuart

Yes you can solder the jet and then re-drill to what size you are after

Is this the dreaded Diaphragm? (see att pic)
I noticed 2 or 3 very small cracks/splits so did a macro shot highlighted in yellow.
Another question is, would this be the cause of slight fuel Seepage in the other pic,
where the Acc arm moves back n forth?
Because even stationary engine off its slowly seeping out.

If it is, i don't have a replacement and wondered where i could buy a new one.

Thanks
Stu

Quote:

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Originally Posted by StuHERTS

Is this the dreaded Diaphragm? (see att pic)
I noticed 2 or 3 very small cracks/splits so did a macro shot highlighted in yellow.
Another question is, would this be the cause of slight fuel Seepage in the other pic,
where the Acc arm moves back n forth?
Because even stationary engine off its slowly seeping out.

If it is, i don't have a replacement and wondered where i could buy a new one.

Thanks
Stu

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yes that gasket would be the cause of the leak, not sure you can get the gasket individually think it's in a complete gasket set only. Worth messaging Mike he will confirm if available seperatly.

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Originally Posted by JTEC

yes that gasket would be the cause of the leak, not sure you can get the gasket individually think it's in a complete gasket set only. Worth messaging Mike he will confirm if available seperatly.

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Excellent! Thanks.
I'm hoping that's the only cause!
Ill ask around if anyone or Mike has a spare to sell,
if not buy the set :(

Quote:

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Originally Posted by StuHERTS

Excellent! Thanks.
I'm hoping that's the only cause!
Ill ask around if anyone or Mike has a spare to sell,
if not buy the set :(

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For the cost of a gasket set worth replacing all the gaskets with new and giving the carb a good clean through:agree:

Quote:

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Originally Posted by JTEC

For the cost of a gasket set worth replacing all the gaskets with new and giving the carb a good clean through:agree:

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Yea I was given a bag with the car with Most of them as new, but no Diaphragm or the main Rubber gasket (big one).

yes that diaphram will be the cause just had to do mine after same problem

Need a Diaphragm so will have to just order the whole set.
Id like to get the top plenum O ring seal aswell.
Wheres the best/cheapest place?

Our very own club shop: https://www.rtoc.org/shop/index.php?m...sl238v8qivusb2

Quote:

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Originally Posted by Mart

Our very own club shop: https://www.rtoc.org/shop/index.php?m...sl238v8qivusb2

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Tried to look for a basket or purchase item then noticed the "Sold Out" sign :(
Just Emailed Mike, need to order the whole kit just for a Diaphragm :brickwall:

Quote:

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Originally Posted by Mart

Our very own club shop: https://www.rtoc.org/shop/index.php?m...sl238v8qivusb2

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0 Units in Stock

:cry:

Just see them on on Ebay for £28

http://www.fastroadcars.co.uk/shop/i...d&productId=92

:agree:

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Originally Posted by Jonny5

http://www.fastroadcars.co.uk/shop/i...d&productId=92

:agree:

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Yea thats the one.. Whoever contacts me first gets the deal LOL

Quote:

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Originally Posted by StuHERTS

Just see them on on Ebay for £28

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Extra £ for the throttle seals, and that kit doesn't come with the idle jet o-ring, nor the large plenum o-ring.

If the club's out of stock though, I guess that leaves little choice...

Saying that, if you can hang fire 24hr, I'll have a look in my box of carb' spares to see if I've got a spare accelerator pump diaphragm you can have.

Quote:

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Originally Posted by Mart

Saying that, if you can hang fire 24hr, I'll have a look in my box of carb' spares to see if I've got a spare accelerator pump diaphragm you can have.

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Thanks Mart,
I see you like Pie n Mash, you from east London?
IRONS

If club is out of stock, I did speak to Ian telling him what I can get them for the club.

Ordered kit & Plenum O ring off Mike this morning, done a good deal.
Need to get this carb back in for the weekend..
I did see a Diaphragm for £20 on its own but i aint a mug lol

Measured my main jet, its 1.3
I have another jet that is bigger than a 1.2 (1.2 drill bit moves around), but the hole doesn't fit a 1.3 drill bit, on the side the marking looks like a 1.25.

Also, Could someone show me where/what the Venturi is/looks like?

I have a standard T2 (i think), Group A carb (apparently the venturi was enlarged) and a 1.3 installed but the carb overfuels like crazy and sends out **** loads of soot on the exhaust & plugs..
Should i use/try the 1.25ish jet? or just go with 1.2?:scratch::scratch:

Stu

Quote:

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Originally Posted by StuHERTS

Measured my main jet, its 1.3
I have another jet that is bigger than a 1.2 (1.2 drill bit moves around), but the hole doesn't fit a 1.3 drill bit, on the side the marking looks like a 1.25.

Also, Could someone show me where/what the Venturi is/looks like?

I have a standard T2 (i think), Group A carb (apparently the venturi was enlarged) and a 1.3 installed but the carb overfuels like crazy and sends out **** loads of soot on the exhaust & plugs..
Should i use/try the 1.25ish jet? or just go with 1.2?:scratch::scratch:

Stu

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As said on facebook ditch the large venturi carb and get a std one

This is a large venturi carb
https://www.rtoc.org/files/Technical%...uri%20carb.JPG

This is a std venturi carb
https://www.rtoc.org/files/Technical%...n/IMG_2942.JPG

Agree with jtec, get rid of the group a body and fit a standard venturi carb

Is this Group A worth more or less than a standard one?
I'll replace the few bits that need replacing, put it back together so its in good working order then flog it on Fleabay and buy a std one.
:scared:

Quote:

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Originally Posted by StuHERTS

Is this Group A worth more or less than a standard one?
I'll replace the few bits that need replacing, put it back together so its in good working order then flog it on Fleabay and buy a std one.
:scared:

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:sad2: again what did we tell yer :) talk to mike about a good price on a serviced one for Xmas the mrs might treat yer:)..... It's what I did started again fresh new carb it would have saved me hrs and £££££s but altleast you learnt something along the way :p

Yea i know you did lol..
It was running ok(ish) just over fueling but going to install my AFR soon.

I got my kit from Mike this morning, just putting it together now..
Ill speak to the missus but i exhausted all my xmas pressie money on the car lol
Ill sell this and email Mike about prices for a std one.
Stu