Please can some one explain the differences between the various common Weber carbs that I'm looking at using on my zetec. These mostly include

IDA down draught
IDF down draught

DCNF down draught

DCOE side draught

I'm not really sure what to go with. The DCNF and DCOE stuff is a lot dearer to get hold of than the IDA/IDF stuff, so I'm assuming these are the performance based carbs.

Also, if anyone can shed any light on the DGV 32/36 stuff and whether it's any good that would be cool too.

Thanks a lot

Dave

 

The DGV/DGAV 32/36 is a ace carb, depending on how much power you want, it's a mechanically progressive carb, ie secondary(36) starts to open after about 2/3 open on primary(32), a lot were replaced with 38DGAS, or if you could get one a 40DFI, both mechanical carbs, the 40DFI was synchronous(non progressive), ie both throats open at the same time/amount, these were fitted on the 3L capri v6 etc, the 40DFI was a upgrade perfomance wise.
The main diffeence is the age of the carbs plus the engine configuration they fit, the ida and idf for example are used from fiat 124 to lambo urraco to porsche and even Escort RS2000, which could be had with a 44 IDF 40/41, the lancia stratos for example used a 40 IDF 28-29,28(2)-29(1) x 3!!
Age is the big thing, the dellorto DHLA is a better carb than the dcoe, they look similar owing to being designed by the same man, now retired and living in Hingham, Norfolk.
Why do you want carbs, efi is just so much better in every way, you can get the same noise as carbs with tb's as well so best of both worlds.
If you seriously want to know the intricate differences Haynes book number 393 covers these in extreme detail for rebuilding each.
tabetha

 

Carbs are a cheap and simple way of getting my track car in action.

The cheapest quote I have for getting management on my car is Ł1300, but a set of carbs and a megajolt are circa Ł300 all in.

Plus the fact that the old man is handy with Webers, but I won't see him for another fortnight so wanted to ask the question now lol as I'm so nearly finished.

 

Webers and MegaJolt for Ł300? Might be being a bit optimistic there mate.

Megajolt will need a fair amount of time spent on the dyno if you want the best out of it, as will the Webers, and still won't perform as well as TB's as an end result.

 

Yeah I think you're right. I'm gonna have to face facts and save up for some management.

 

Look at M tech V4, ecu, loom, set up for around Ł650, pm danny from PE.
There are a very very few rare occasions where the difference is extremely small between the best set up carbs and efi in terms of drive ability, even rarer when the carbs score a few ponies, but seriously rare.
The sheer driveability between big carbs and efi is really like night and day, in general efi is better for power and torque all across the rev range with vastly better low speed economy/emissions, and requires regular tune ups, unlike efi, once sorted it's sorted.
Big carbs such as dcoe/dhla 45/48 can be a serious pain in the rs at low speeds, traffic.
tabetha

 

ok cool, i'll have a hunt for him

thanks for the pointers