webber choice

blitzmile · 11-10-2005, 12:53 AM

ive been told that a 40 webber would be the best compromise between street drivability and power for a mildly worked 2 litre pinto. any suggestions?

The MaDDeSTMaN · 11-10-2005, 11:40 AM

That's what I've heard too. Never tried it, so I can't give you an opinion, I guess the best way to find out would be to try it yourself and see how it suits YOU and your car

EA2BA · 11-10-2005, 11:43 AM

I ran a dual barrel webber on my 2L cortina the stock one, from memory was something like - 26mm primary and 28mm mechanical secondary from memory was very good when tuned correctly.

18-10-2005, 08:48 PM

depending on what ur lookin for performance wise... a single 45mm will be best for street drvin as well as give u a lil kick in the ***... but twin 40mm not only look the bit but will give u better response and overall better fuel metering, performance etc... but be careful with the twin coz u gotta synchronise em etc... best to get a pro to tune em 4 ya... also at the way the price of fuel's lookin u best goin with the single 45...

Perana · 18-10-2005, 10:30 PM

I would say twin 40's would be the best bet.

Im not much of a fan of running a single weber really.

If your not sure on what your doing with them get someone that knows what they are doing to set them up though... They arent the easiest!

T3man · 20-10-2005, 12:02 PM

Stick with the original downdraught weber - the sidedraughts are a waste of time, money and fuel. Just my opinion after trying twins on mine and went back to the original.

xyute · 26-10-2005, 09:43 PM

Set up correctly twin dcoe's will out peform any other carb combination, and alot of injection setup's as well

rag top · 26-10-2005, 10:31 PM

and twins chew the fuel as well!

I've found the tweaked stock carby can be made to work very well off the line, but twins work the best at the top end.

someaussieguy · 28-10-2005, 05:48 PM

I am running twin 45's on my mk2 escort. If driven nicely they dont use too much fuel, although they still use a fair bit more then a single would. but if u drive hard, the needle goes straight ot empty. They also make the car run a little rough specially from 1500-2500 rpm which makes it annoying to drive in traffic. But if its performance u want, they give a significant increase over a single carby, and aslo sound awsome.

Gammaboy · 28-10-2005, 07:34 PM

Twin 45s? if you had a 2l worthy of having twin 45s then you'd have *nothing* below 3500rpm anyway....
Twin 40s with 32mm chokes will work very well on a Mild 2l. Don't limit yourself to just webers though. Alfas came standard with twin dellortos (40DCOE patern, 32mm chokes) and they can be had fairly cheaply...

someaussieguy · 01-11-2005, 07:07 PM

Yea u dont make any real power till about 3500rpm (when the cam comes in) and as i said b4, it has a flat spot 1500-2500 rpm. but its a sacrifce that's worth it. what would u consider worthy???

xyute · 01-11-2005, 10:27 PM

I keep trying to get through to ppl who winge about weber's set them up properly and there is no other carby that can match them there are millions of different jet combinations.
I'm using them on all my cars at the moment.
Twin 40 Dcoe's on my twin cam 1600 Cortina and they deliver power right from idle to the redline.

Gammaboy · 01-11-2005, 10:34 PM

Quote:

Originally Posted by someaussieguy

Yea u dont make any real power till about 3500rpm (when the cam comes in) and as i said b4, it has a flat spot 1500-2500 rpm. but its a sacrifce that's worth it. what would u consider worthy???

A cam that starts at 3500rpm on a 2.0 is right down on the bottom edge of what you'd run 45s on... It'd work a whole lot better with 40s fitted with 34 or 36mm chokes....

blitzmile · 02-11-2005, 12:48 AM

sounds like to me the 40's are the way to go. seeing as the car is going to be on the road and not on the track (unless :hihi: ) i still want a good amount of useable power down low. i might have a pair of second hand 40 weber's available soon to buy, but should i only be looking at weber carbies? although they are one of if not the best carb makers out there can i use any other carbs that will yeild just as good results and be easier on the pocket?

Gammaboy · 02-11-2005, 12:52 AM

Dellortos were basically a redseign of the Weber to reduce manufacturing costs, however there are a couple of improvements in them over a weber. I believe that they have a better accelerator pump design, and give better atomisation. Its been a few years since I played with them though.

blitzmile · 04-11-2005, 02:33 PM

i was able to borrow a copy of david vizards book about fords SOHC. he doesnt seem to like webers as much when applying them to the 2 litre engine and talks quite a bit about using holley carbies. although this was 30 years ago does the same apply now or not. i guess whats bugging me is figuring out exactly what carbie is going to be the best for me to use? does anyone know of any plces in melbourne that specialises or has had experience with these engines that i could talk to?

T3man · 05-11-2005, 10:44 PM

I have the Holley on my Capri.

I tried it on the Eski and it ran really good. Better than the sidedraught Webers and Dellortos I had. It used more fuel than the original carby but not as much as the sidedraughts .. you can't have everything. It gave good manifold vacuum (on the original manifold of course) which was almost impossible to achieve with the sidedraughts even with a vacuum tank fitted. It gave very good response down low as it is a twin throat and not a staged dual throat carb.

blitzmile · 06-11-2005, 09:48 PM

so you would suggest the holley. did you get to have it dynoed t3man? obviously i cant go out and buy every carby out there, and try them. anyone got any suggestions as to how i could go about finding the right one?

T3man · 06-11-2005, 11:13 PM

I had it dynoed with the original ... 72rwhp. With the twin sidedraught Webers ... 80rwhp. The Holley was somewhere in between but I never dynoed it with the Holley on, just my bumometer.

However I still reckon the best carby on a street driven Eski is the original ... that's why it's the one I'm using.

Gammaboy · 06-11-2005, 11:15 PM

80rwhp?
a) How big was the motor?
b) How big were the webbers?

Twin sidedrafts on a 80 hp motor... :S

blitzmile · 07-11-2005, 11:14 AM

Quote:

Originally Posted by Gammaboy

80rwhp?
a) How big was the motor?
b) How big were the webbers?

Twin sidedrafts on a 80 hp motor... :S

and also did you get any work done to the engine, porting, cams etc.?

T3man · 07-11-2005, 01:57 PM

What's wrong with 80hp??? What a dyno says in absolute terms means SFA anyway - I was only interested in the comparison betwen the two setups. The Webers gave approx 11% increase in power but used about 20% more fuel.

The motor is 2.0 litres. The Webers were 40DCOE I think ... don't have them any more so can't check.

The head has been ported and the largest SS valves that can be fitted - I've posted details before about valve sizes and cam timing/lift etc. The cam is not wild by any means. The engine should be producing about 100hp with the mods I've done and using the standard carby according to technical books I've referenced. It has completely standard bottom end and has just on 315,000km on it.

PS the same dyno showed my XE EFI (manual with extractors and good exhaust system) having 140rwhp if that has any meaning to anyone

blitzmile · 07-11-2005, 02:34 PM

i went to a carby place today and was talking to the guy there about what i want to get. he highly recommnded me getting twin 45s or 48 side draft webbers. i was a bit skeptical and asked him whether i would have any power down low. he saaid that the size of chokes effect how the car will run (and the cam in term of its power band). pretty much if i get 48 he said i could not only get it to run like a 40 but if i wanted i could put 40 mm chokes on it if i want to get even more power. with a 40 i couldnt do that. any thoughts on this anyone?