TWIN DUAL WEBER 40 45 DCOE HELP / OR IS 32/36 , 38 WEBER A BETTER CHOICE?

[2old_honda]

I think that I would go with 32mm chokes. I think Site has 30's and he wants to go bigger.

[2old_honda]

PhydeauX, do you have any pics of your setup? I was looking through some old threads and the ones that you posted were not working.

[PhydeauX]

They're all here, the ip changes every so often and kills the links. http://68.81.249.80:3000/accordpics/dcoe_manifold/

andy

[2old_honda]

ok, I have been looking around and reading some stuff and here is what I came up with, please tell me what you think about this:

32mm choke
130 main jet
F2 e. tubes
180 air correctors
50F9 idle jets
40 pump jets
4.5 aux jets

[2old_honda]

also, I will be running a colt tri-flow cam from the group buy.

I also found a jetting program, if anyone wants it let me know.

[88lxDCOE]

I think I have all my jetting figured out, thanks to phydeaux. But Id like the jetting program.

[2old_honda]

PM me your email address and I will send it to you. (it is a small zip file)

[2old_honda]

Will I need a new fuel pump and a FPR when I swap in the DCOE's?

[Site]

I'm still using the stock pump and no FPR. In a couple of months, though, I'm going to starting working on adding a blow through turbocharger setup to the mix. That will change everything.

If I were going to keep it N/A, I would add a high flow, low PSI fuel pump. I think Weber makes one that's sold on www.piercemanifolds.com.

[2old_honda]

thanks

[2old_honda]

hey Site, one more question- what linkage did you use?

[Site]

I used some linkage pieces that came with the carbs. There was a ziplock bag full of pieces the guy didn't know what to do with - stuff from several linkage kits. I frankensteined them together to make something that works. I hacksawed and bent the throttle cable mounting plate from the stock carb and used it in the setup, too. I was able to use the stock throttle cable. Mostly, it works like this:

[2old_honda]

thanks again!

[A20A1]

It would be an improvement... our pump puts out 3.3 psi
correct me if I'm wrong. I'm not sure on the GPH

[AccordSi]

The pump I use pushes 4.5-7 psi...way too good enough. Although the A/F says the mixture is good, it may still be too rich, which is probably why I hear so many loud pops when I change gears and/or slow down. Then again it sometimes spits small flame out the tailpipe at high rpm/low gear (1-3) changes so it could also be in the tuning. Whatever it is I LOVE IT!!!!

[PhydeauX]

You really shouldn't have more then 4psi at the carbs on webers. The valves wen't designed to hold back more then that. For what you have now the stock pump should be more then adaquate.

andy

[3G Jester]

how much did you guys all pay for a weber dual carb and where...im thinking about doing it....also..any tips? trouble shooting? advice? thanks!

[dXsquared]

the double DCOE is a lot of cash and time... if u have no reason for the double carb setup... just get a DGV carb... they make kits that just get bolted on... removes all ur vaccum lines and gives u HP...

visit CARBSUNLIMITED.com

Travis

[3G Jester]

thanks trav.
by the way. nice name.

--travis

[doug]

The little bit of research I've been doing brings up a question. I've noticed that there are several series of 40 & 45 DCOE carbs available. For example,
40 DCOE 2
40 DCOE 18
40 DCOE 32
45 DCOE 13
45 DCOE 9
I'd like to know if it is necessary for both carbs to be of the same series, i.e both 40 DCOE 2 and not a combo like one 2 and one 18. It would seem that it is desireable for them to match but is it absolutely necessary? Thanks for any info.

[A20A1]

- My book says the 45 DCOE 9 is a variation of the 45 DCOE and that there are 10 variations of the DCOE 9.
I still can't find it in the book but i read that finding a matched pair is best.

[doug]

I've read that the series numbers are just a means of identifying a specfic carb setup for a specfic production car. So I would think that any one of them could be setup with a specific set of internals thereby allowing the creation of a "matched" pair regardless of the actual series number. But I'm not sure.

[A20A1]

The series # is the throttle plate size ex: 40, 45
(prefix/series - letters of Italian words - suffix/Variation)
40 - DC (Doppio corpo) O (orizzontale) E = trapezoid mounting pattern - 9, 18 , etc.

I still can't find where is talked about a matched pair/set.

[A20A1]

I can't find it... it talked a bit more about the last #. You're right... it was for a specific application. but it also notes that adjustments made on a DCOE 18 will be different for a DCOE "x" like adjusting the mixture screw will have less ore more turns to get the same effect.

[Site]

Your best bet is to get a matched set. Otherwise, you'll end up having to buy expensive jets and stuff to get the internals to match up. It's an expensive conversion to begin with, make it easy on yourself!