Technical twin carbs???

[mase]

jay sent me a pic a little while ago of an inlet manifold which could take twin carbs....

the thought of twin 40mm TB's has got me drooling, and i was wondering if anyone could shed some light on it... wat sort of work would be required, stand along managment systems, etc etc..

 

[Catseyes]

carbs mean no ecu, but also no mot because you wont get it to work with a cat!

 

[jamie86]

carbs mean no ecu, but also no mot because you wont get it to work with a cat!

But if the engine is a pre' 1990

Also I though if your car passes the emmisions a CAT is not needed?

 

[mase]

i am sure my engine already has 1 webber carb, and an ecu, and a CAT.... and an MOT

 

[Steven]

Not a Cinq I know, but my old Alfa Sprint ran on twin carbs with bolt on K&N filters and it sounded like thunder. Fantastic. I'd love to see a Cinq with that set up.

 

[mase]

I'd love to see a Cinq with that set up.

so would i... twin bolt on ITG foam filters.... would be a beast, somethin slightly different as well, as long as it doesnt cost a kidney to do i might have to seriously look into it :chin:

 

[J333EVO]

I had twin webbers on my MK1 XR2, 1760cc overbore, twin 40's with K&Ns, PECO HDR manifold and exhaust system, Kent Rally cam, sounded amazing, loved that car. Had Recaros in it as well and half bolt in cage, custom made front and rear strut brace bars cos they were not available to buy in those days, Bilsteins all round which lowered tha car so much i had to get an engineering company to make me a longer driveshaft to stop it popping out with a bracket to bolt it to the back of the engine as the angle they were at was so extreem, it also had the number plate TOJ 222Y, can't seem to get away from these triple number plates.

 

[jamie86]

I had twin webbers on my MK1 XR2, 1760cc overbore, twin 40's with K&Ns, PECO HDR manifold and exhaust system, Kent Rally cam, sounded amazing, loved that car. Had Recaros in it as well and half bolt in cage, custom made front and rear strut brace bars cos they were not available to buy in those days, Bilsteins all round which lowered tha car so much i had to get an engineering company to make me a longer driveshaft to stop it popping out with a bracket to bolt it to the back of the engine as the angle they were at was so extreem, it also had the number plate TOJ 222Y, can't seem to get away from these triple number plates.

And the point of that post was?

 

[Steven]

Here's what twin carbs and filters looks like under the bonnet of an old Alfa. I still miss that car...

 

[J333EVO]

And the point of that post was?

Errrrr, i think twin 40's on a Cinq may be overkill, think it may be hard to set up the fueling correctly so as to not over fuel, giving an example of the size of engine that I used them on, tho in saying that the limited edition Nova Sport was a 1300cc with twin carbs as standard for homologation purposes!

There that good enough for you douche bag!

 

[jamie86]

Errrrr, i think twin 40's on a Cinq may be overkill, think it may be hard to set up the fueling correctly so as to not over fuel, giving an example of the size of engine that I used them on, tho in saying that the limited edition Nova Sport was a 1300cc with twin carbs as standard for homologation purposes!

There that good enough for you douche bag!

Yeah that's more like it

I was about to say about the Nova Sport :bang:

 

[J333EVO]

Yeah that's more like it

I was about to say about the Nova Sport :bang:

Yeah yeah sure you were, or what about the Citeon AX with 1294cc and twin 40's that was made for the French market for the French 1300cc class group N rallying, as did the French 205 Rallye, again just under 1300cc with twin 40's (UK model didn't get the twins I beleive)

The more I think about it the more I think it could be done but at a cost, as the 1242cc is only 50cc short of what car makers themselves have offered, it would just be a pain MOT time I think as the romour is that in the UK feeked up the homologation process with the Nova so it was supplied with a single carb to get through the emmissions but the twins sat in a box in the boot as a "dealer fit option" not so in Germany where the Corsa (German Nova) Sport homologated it no problem.

 

[beastyjay]

as i`ve been saying to mase on msn. t40s will be overkill. carbs are such a slut to set up on a car that can handle them let alone a cinq that would have to have the carbs toned down for safety purposes.

 

[Catseyes]

i am sure my engine already has 1 webber carb, and an ecu, and a CAT.... and an MOT

Sorry babe, but I think your confusing injection with carbs.

Carbs are like having a tap left on with fuel coming out with very low fuel pressure needed and is adjusted very crudely. They are set to over fuel slightly to get power out and as such is very hard to setup with a cat on the car as over fueling wears them out.
Since we all have to have cats on the cars to pass mot, car makers have to get the fueling spot on so not to wearout cats.
This is why every car has some form of fuel injection these days. :yum:

I am 99% sure that all cars with carbs dont have cats on them (happily corrected if someone has an example ) however if you want to go via carb route then get the inlet manifold from the fiat panda, alternatively find out how the pandamonium was done as that had twin carbs too.

Webber are famous for making carbs but they dont make them anymore (no car makers buy them) they can only supply refurbished units however they do supply a lot of today injection systems (perhaps this is what you mean? )

Fitting carbs will sound wicked, will get power out of the car but not as much as a remapped injection system and will cost a fortune to run as it is over fueling all your petrol away...

Setting up a non-standard carb is all about filing/rubbing/sanding down a brass pin so it changes widths in all manner of none linear fashions. This pin is called a jet, or rather it controls the jet opening. Any non standard jetting is often limited to a fair old range of these pins. If you can find someone who still has such a range and a range that suits your car set up, the rest is easy. Its a black art mastered by only a few, if you are taking things seriously. But please note the carb's man dream is one carb per cylinder, forget the difficulties of mechanically linking all together so the carbs work together. (Guess you know the problems uneven firing/compression/mixtures can produce at the finer end of things, if your being serious). NB some natty little Jap sports cars had one carb per cylinder.

The old story was to have one carb? But Carb men need twin carbs. And dream of one carb per cylinder and the next step every carb man wants to make is injection......

Unless your Micheal J Fox I wouldn't try to go back to the future..:devil:

Lol - i did that without taking a breath!! :nerner:

 

[chaos]

Early 90s minis were carbed and had cats IIRC - the mini 30 was 998cc, carbed and had a cat as an option IIRC.

Twin 40s is overkill for a 1242 IMO.

 

[jamie86]

Fitting carbs will sound wicked, will get power out of the car but not as much as a remapped injection system and will cost a fortune to run as it is over fueling all your petrol away...

Oh now you've done it

Awaits mase to shout

*Flamer Kit*

:devil:

 

[Catseyes]

Oh now you've done it

Awaits mase to shout

*Flamer Kit*

:devil:

Cool.

And I stand corrected re the mini.

 

[jamie86]

Cool.

And I stand corrected re the mini.

He would also find it amusing to use the flames to awake people in the morn at shows

 

[mase]

Oh now you've done it

Awaits mase to shout

*Flamer Kit*

:devil:

oi, dont tempt me....

as i said, i think they look awesome, on a 300bhp evo maybe, on a cinq? no thanks. :devil:

 

[Catseyes]

He would also find it amusing to use the flames to awake people in the morn at shows

Was I caught sleeping in my car at gaydon then