Carb help

[trystan Lewis]

Anyone in south Wales willing to help me set up a group a carb very happy to pay the going rate,want it running sweet !:D

[andybond]

I would strongly recommend selling the group A carb and getting a standard one and doing the jets the right way

[Romil Davda]

I would strongly recommend selling the group A carb and getting a standard one and doing the jets the right way

:agree:

[trystan Lewis]

What's wrong with the group a carb then? Out of curiosity ? It came on the car when I bought it :scratch:

[andybond]

Its an old skool approach to fuelling.

It worked on the principle shove lots of fuel into the carb , cross your fingers and hope for the best.

Typically the reality is it runs rich on idle / low boost and leans off on higher boost.

If you drill out the jets on a "standard" carb you can fuel a lot more accurately.

[trystan Lewis]

How much would a standard carb and set up cost me and could I sell my group a carb or does no one use them anymore ?

[andybond]

Ebay your carb and you will get strong money.

There is a great guide on carb rebuild / setup on here somewhere.

I assume you have an AFR kit ?

[Romil Davda]

You should be able to sell the Group A on eBay for quite a bit. You can buy a second hand standard carb and service it with the relevant kit, will be like new for half the price...


I got my service kit from Mike (GT Turbo Spares co.uk (http://www.gt-turbo-spares.co.uk/)). Have you got an AFR gauge connected up?

[trystan Lewis]

Purchasing an aem afr tmoz,I still don't understand why the group a carb is not a good idea when they fetch strong money,why would it fetch strong money if it's not any good
:scratch:

[trystan Lewis]

Sorry about the quizzing but I'm just intrested :D

[Nottswoody]

Couple of weeks ago I baught the rebuild kit from the rtoc shop and baught a standard carb from cgb Motorsport all working spot on now and drilled the 2nd stage out no probs since.. And it's really not as difficult as you would think just make a clean space on your bench and watch what your doing.. If I can doit anyone can doit.. Plus you always have the help of the club at hand..

[andybond]

Purchasing an aem afr tmoz,I still don't understand why the group a carb is not a good idea when they fetch strong money,why would it fetch strong money if it's not any good
:scratch:

Look at it like this.

Its old skool tech at a high price. It was the perceived way of stopping your engine grenading by wanging in gallons of fuel. No AFR back in the day.

Tuners wont ( mostly ) have move with the times but will have moved on in terms of cars so will still be handing out the get a groupA carb advice.

Plus the foreign legion are mad for them. They keep prices high

[Romil Davda]

Its an old skool approach to fuelling.
It worked on the principle shove lots of fuel into the carb , cross your fingers and hope for the best.
Typically the reality is it runs rich on idle / low boost and leans off on higher boost.
If you drill out the jets on a "standard" carb you can fuel a lot more accurately.

As Andy stated, group A carbs are the old skool way :sad2:.

Get the AFR fitted and see whats its running? You never know, it might be ok but the chances are its not. What boost you running? Because once you start to up that, you'll need to rejet the carb! (assumtion being made here)

[rs250nut]

I wont call it a group a carb because there never was a group a r5gtt made, you can get the larger venturi carbs to work but they can be very trickey to set up hence why most go with a stock carb. If your running the car for all out power on the strip run it with a bigger carb, if not run it with a stock venturi carb jetted to suit your set up.

[trystan Lewis]

1.2 bar boost,t25,race cam and modified head,group a fuel pump this is what's on the ep invoice

[fishead]

no more old school tech than jus upping the main jet in a std venturi carb, which they also used to do

why would it give a richer idle than it would if it was std venturi ?

[andybond]

I was inaccurate in what I typed fella , I should have put low rpm , not idle RPM.

As you say tho - another thing to do is / was larger main jet..

[trystan Lewis]

So I could keep my carb and just re jet it If the afr reading is not correct ?

[Mart]

If the overall carb is generally in good working condition, there's no point selling it for a simple case of swapping the venturi to a 25mm diameter type (ie, o.e).

The jets can be soldered up/drilled out as necessary.

Voila, one 'standard', correctly jetted carb, which has cost you nothing (apart from sourcing the 25mm venturi, but I'm sure you'll find someone who would straight swap for your 'grp A' (sic) sleeve).

[Romil Davda]

http://www.renault5gtturbo.com/forum/viewtopic.php?f=19&t=11572
Check out the response from Markey Mark x2

[andybond]

If the overall carb is generally in good working condition, there's no point selling it for a simple case of swapping the venturi to a 25mm diameter type (ie, o.e).

The jets can be soldered up/drilled out as necessary.

Voila, one 'standard', correctly jetted carb, which has cost you nothing (apart from sourcing the 25mm venturi, but I'm sure you'll find someone who would straight swap for your 'grp A' (sic) sleeve).

Good point well made.

However, I have been following them on Ebay and they have been going for daft money.

You could sell the larger venturi carb , get a standard one and rebuild kit and be quids in ?

[Mart]

True, but what's to say the chap sells a perfectly working carb (albeit with the bored out sleeve), and ends up buying a standard one which turns out to be fecked; eg, warped body & base faces, snapped acc' pump rod or lever, faulty enrichment cct, cracked/leaking float, etc.

Sometimes it's better the devil you know...

[trystan Lewis]

I think best bet is to link the afr up and go from there,anyone in south Wales that can look at it any recommendations ?

[trystan Lewis]

Thanks for all of the advice :D

[Markey Mark (BD)]

If the overall carb is generally in good working condition, there's no point selling it for a simple case of swapping the venturi to a 25mm diameter type (ie, o.e).

The jets can be soldered up/drilled out as necessary.

Voila, one 'standard', correctly jetted carb, which has cost you nothing (apart from sourcing the 25mm venturi, but I'm sure you'll find someone who would straight swap for your 'grp A' (sic) sleeve).

:agree: Best way to go if you know the carb is good

Wonder if venturi's are still avaliable to buy seperately, least be easy to convert the larger venturi carbs back to standard

[trystan Lewis]

So is there anyone willing to help set up my carb in the south Wales area struggling to find someone,would be good to be able to find someone local or option 2 is to travel

[Romil Davda]

Did you get the AFR gauge fitted?

If yes, what is the reading on idle, normal driving and WOT?
If no, get it fitted, then let us know the above ;)

Whats your postcode too, just so peeps know where you are? If you can travel, speak to Markey Mark (Aylesbury), he is the man for carbs.

[trystan Lewis]

Cf728sp

[caymanr26]

You ever get anywhere with this?