Weber Carbs

[vivaspeed]

I've got an 1800 with a 32/36 DGAV on it which goes all right, but I'm building a new 2300 to go in and I have a few decisions about fuelling to make...

1. 32/36 DGAV re jetted for 2300
2. 40 DFAV or 38DGAS from a V6 Capri re jetted for 2300
3. Find some twin Strombergs from a 2300
4. Convert to electronic injection - I have a manifold and computer setup, but don't really want to go the injection path yet (pumps, lines, tank mods etc)

Has anyone else gone down the single weber path on a 2300? It will have a mild cam, extractors, minor head work etc - will a single Weber cope with this and not be too much of a restriction?

Any advice or discussion appreciated


Cheers,
Geoff

[xwv2300]

The 38dgas should work well on your engine, i ran one on a 140 bhp pinto road rally escort no problem, and have kept the carb to use on my 2300 when done, not really any power difference over twin strombergs but eaisier to maintain. youll need to make an adaptor for the manifold.
injection would be nice, it was used on the race 2300 firenzas but never on road cars i think most injection systems at the time (early 70s) had problems (i remember my dads 2.5pi triumph, 150bhp or nothing ) but modern technollagy has overcome problems even on old systems now so if youve got the original injection manifold etc, i`d say go for it, might be a challenge but would be nice.
( ps the 38 dgas was good up to about 160 bhp on the 3.0 v6 engine so should have no problems with the mods you`ve stated, might not even need rejetting)

[edgoose1]

Depending on how far you want to go. When i fitted my 2300 i put twin 45 webbers on as i was told this would give best performance. They do need seting up properly at a rolling road. However i ran the ohv vivas i had on 28/36 carbs and these were very good so the 32/36 should be a nice carb to run the 2300 on. Will also need rejeting but easy for any rolling road or carb speacialist to do. You could also use twin 40s instead of twin 45s. Electronic ignition is also a good idea. I also run points on my 1800 and have no problems its a standard car. Electronic ignition will be better if you go for the twin 40s or 45s as it will cope better with the higher revs. I think points will tend to burn out quicker with a high reving engine.

[xwv2300]

yes twin webbers or dellortos are good for performance but i would`nt use them on an everyday car, unless you drive a hour to work down country lanes every morning .depends on useage,
don`t think the 32/36 carb would be up to the job on a mild tuned 2300, perfect for the 1800 and maybe a standard 2300, 38 dgas is a much better carb.
( for those who don`t know a 38 dgas is an upright twin choke webber with 2 38mm inlets and both chokes open together normally found on top of a capri 3 liter v6 engine)
32/36 used on escort 1600 mexicos and cortina ghias.
Why did Vauxhall never use webber carbs as standard ??????????????????

[vivaspeed]

So of the 38DGAS and the older (?) 40DFAV which carb would be better?

I am only persuing this option because I've got a OHC Weber manifold and it's just too easy!

Don't want twin 45s - over here a complete setup would be NZ$1500-$2000 including linkages, carbs and a manifold (if I could find one!) - by comparison a new programmable ECU, fuel pump and bits would be just over $1000.

I've got a Bosch dizzy for it which transformed it totally, and if I wanted it could be run from the ECU if I injected it.

I've had injection going on an 1800 and it is awesome, no more flatspots, fuel surge and general *Bleep* running - homemade manifold with Toyota bits on it. If something isn't running right then you just enter in some new numbers from the comfort of the cabin - no more screwdrivers in the engine bay...

[lambaj]

Go for the 38DGAS over the 40DFAV. Much better fuel economy (if you can call it that) and will not suffer any noticable performance loss over the 40 on a 2300 unless you have a full on racer. Also finding a 40DFAV will probably be tricky, cost more and service parts are very hard to find. 38DGAS's pop up all the time, and if you nose about you can probably get a good base line jet setup from the ford boys who run overbored and stroked pintos.

One other option if your having to make adaptors is the 40IDF as often used on tuned VW's. These are basically a vertical DCOE. Again, not hard to find and very tuneable. The advantage of these is you can change the venturi sizes whereas the DGAS is 38mm fixed.

Food for thought.
Cheers
Tony(HA21)