Anyone Know Much About Carburettors?

[PaRtZ]

I have a pug 205 1.4GR and Ive been blessed with a TU3 A/K or a TU3 A engine and a Solex 34 Carb. Just looking in the future to getting an upgrade, if possible. What I want to know is:

If Im going to change it, is there a standard size that all carbs come in or a specific sizes?

What defines a better carburettor over another?

I've heard weber carbs are a superior make but again I don't know what to look for. Im mostly doing this to gain a bit more experiance on the car and to boost the performance a bit more

Thanks in advance

[Pashley26]

Well, Swap over the Carbs and Inlet Manifold with the TU3s engine (as in Citroen AX GT or other larger peugeots) There fitted with Twin Solex's ]

Use the TU3s Camshaft too, With a bit of rejetting you *should* be up for 100Bhp

Carburetors in general come in varying sizes for different engine/fueling set ups. But the sizes vary through different makes. The general tuning option is "Webber 40's" Webbers give a lovely throaty sound and great performance throughout the rev range. And spares for a webber are infinate so you can keep your juicy carbs for ever

The main problem with fitting carbs (Especialy to a 1.4 pug) is finding the right inlet manifold, Because diferent manafacturers use different stud spacing for there carbs. So to change carb's you'll normally always need a new manifold, or adapter. But on the whole a new set of carbs can bring back alot of life Because if you think of the amount of rubbish thats been floating around in the float bowl and blocking up the jets for 15 years they can't be running efficently now ? If you go with what i've mentioned it might be worth getting the Manifold polished, and the Carbs rebuilt with new jets. Should be cheap and any decent garage will be able to do it

What i've said about using the tu3s stuff is your best bet for less than £150, And will keep it useable.

Hope this helps a bit !

Jarrod

Edited February 4, 2008 by Pashley26

[Tony Harrison]

I once bought a pair of Weber 40mm DCNF carbs on the manifold secondhand for £70 on the manifold. They're good, but they drink fuel if you boot it. Also you'll need a half-decent fuel-pump to keep up with them though.

Edited February 4, 2008 by snappel

[PaRtZ]

thats brilliant thanks!

So am I right in thinking that to run Weber 40's I'd need this: Inlet?

Is there anything else I need? incidentally, with 10 hours left, theres weber 40's + inlet on ebay going Here

[The Riddlers]

Youl need the throttle linkage, an electric fuel pump, fuel pressure regulator and most importantly, a few hours on the rolling road to get em set up (youl be looking about £150 for a proper re-jet and set up).

to be honest, your better off getting the 34/36 Webber from an AxGT, getting an KnN airfilter whihc comes with a larger main jet. Spend £50 getting that tuned up and you'll notice more go.

With no other head work, your wasting your money on the 40's...its no good being able to get all that extra fuel/air mixture in the chambers if it wont burn properly, and you cant get rid of it quick enough. To maximise them, youd need a 285 cam, portin' and polishing of the head, a 4branch and decent exhaust system. Itll go faster without, but its a lot of money for not much more.

Oh, and btw...twin 40's sound the tits....

I worked/built TU series engines for years, so know them inside out!

EDIT...just remembered....the carb of a 1.9 citroen BX GT fits....with some tweakage of the throttle cable, they go like stink. But the GT ones are rare as f**k

2nd EDIT...back to your original question...yes Solex's are wank...the diaprams (sp) are shit, the floats stick and you struggle to find re-build kits for them.

(sorry bout the essay btw)

Edited February 4, 2008 by The Riddlers

[PaRtZ]

Youl need the throttle linkage, an electric fuel pump, fuel pressure regulator and most importantly, a few hours on the rolling road to get em set up (youl be looking about £150 for a proper re-jet and set up).

to be honest, your better off getting the 34/36 Webber from an AxGT, getting an KnN airfilter whihc comes with a larger main jet. Spend £50 getting that tuned up and you'll notice more go.

With no other head work, your wasting your money on the 40's...its no good being able to get all that extra fuel/air mixture in the chambers if it wont burn properly, and you cant get rid of it quick enough. To maximise them, youd need a 285 cam, portin' and polishing of the head, a 4branch and decent exhaust system. Itll go faster without, but its a lot of money for not much more.

Oh, and btw...twin 40's sound the tits....

I worked/built TU series engines for years, so know them inside out!

EDIT...just remembered....the carb of a 1.9 citroen BX GT fits....with some tweakage of the throttle cable, they go like stink. But the GT ones are rare as f**k

(sorry bout the essay btw)

lol np, thanks for the info

[Tom Booth]

Well, Swap over the Carbs and Inlet Manifold with the TU3s engine (as in Citroen AX GT or other larger peugeots) There fitted with Twin Solex's ]

Use the TU3s Camshaft too, With a bit of rejetting you *should* be up for 100Bhp

Carburetors in general come in varying sizes for different engine/fueling set ups. But the sizes vary through different makes. The general tuning option is "Webber 40's" Webbers give a lovely throaty sound and great performance throughout the rev range. And spares for a webber are infinate so you can keep your juicy carbs for ever

You'll also need to find out the jet sizes etc for the webbers, and a good rolling road set up.

Please bear in mind your probably not going to get more then 25 mpg with Webbers thou.

[Pashley26]

The carbs and manifold you posted would do but you'll need alot more stuff....

You'll be best going with the full set up off an ax with some mesh ram pipes and the cam

I'll try and find the whole lot on the interweb, Solex's can be just as good as webbers, and with a decent set of Ram's on there they'll sound the tits.

Jarrod

[Tom Booth]

The carbs and manifold you posted would do but you'll need alot more stuff....

You'll be best going with the full set up off an ax with some mesh ram pipes and the cam

I'll try and find the whole lot on the interweb, Solex's can be just as good as webbers, and with a decent set of Ram's on there they'll sound the tits.

Jarrod

Solex ***. We got about 6 in the camper when we brought it, Haha.

[Pashley26]

If only BL made Carbs....

Jarrod