I have a weber 32/36 dgv on my 2.0 now. Thinking about a dual weber dcoe set up to help the engine breath a little more and zip things up a little. Has anyone done it? What size dcoe's? What performance increase is there? Should the cam be changed too? Should I just forget the idea? Any and all comments and thoughts about the subject will be helpful as the whole idea may get a bit pricy!
Thanks
If you can deal with the disciplines of the balancing the Webers, you'll love the power increase, but don't go beyond 40 DCOE for street with stock cam. Headers must be sized for best results ,and don't go too large on the Exhaust diameter. These motors like a little back pressure.
If you get the carbs set up properly, your fuel mileage won't suffer terribly , but light foot is necessary. Mine has internal motor mods and can use 45 dcoe easily for a bigger top end punch.
They make a great sound on hard acceleration.. Perks with the power!
Good luck with your decision,
Pintosopher
not much can beat the sound of those side drafts!
the model #'s escape me , but weber has a couple of larger downdrafts that will fit the standard carb bolt pattern. a 38mm (i think) and a 40mm. i had a 40 (no, not the ones you drink) on mine for quite a while. now that i think about i , maybe it was a 38 i had.
damn memory. i guess it really does go with age!
both barrels open simultaneously. not staged as the stock carb is.
Quote from: Srt on March 01, 2010, 03:22:18 AM
not much can beat the sound of those side drafts!
the model #'s escape me , but weber has a couple of larger downdrafts that will fit the standard carb bolt pattern. a 38mm (i think) and a 40mm. i had a 40 (no, not the ones you drink) on mine for quite a while. now that i think about i , maybe it was a 38 i had.
damn memory. i guess it really does go with age!
both barrels open simultaneously. not staged as the stock carb is.
Srt ,
Yep I have a Massaged 2.0L manifold with a Weber 38DGAS mounted. Both barrel do open together, and when I mounted this on my original stock motor, It was head snap time! I never did do much about the Air corrector mods to eliminate the flat spot at 1500RPM. But I tried some rejetting to lessen the fuel dump at mid range.
That stock carb just starves the motor for fuel economy, I even tried a Modified version of the Stock 32/36 with the Chokes removed without much benefit. But Give that motor more carb and it really wakes up!
Now I'm spoiled, and almost demand my Multiple Carbs, but then I used to be a motorcycle mechanic in the late 70's and loved synching carbs.
BTW : the 40mm non-progressive is a Ferrari carb from the v12 and they used 3 of 'em. Makes good power but way rich for street driving.
Pintosopher :have you checked your Stacks for tune today?
Pintosopher and SRT thanks for the reply's. I have a good set of headers so thats a good start if I do decide to do this. What kind of power increase could I expect with the dcoe's? Why would anything over 40's be bad with the stock cam?
Just hearing the sound is part of my twisted reasoning for thinking about doing this! Growing older, not up!!
Let's put in Perspective:
A Racing Cosworth 16 valve twin cam ford 1600 on race gas has about 230HP using 45 DCOE carbs. Your stock pinto 2.0l has about 90 with headers and stock carb. Add more carb and you might get to 150. Not much more. But you'll give up throttle response up to the rev limit for the stock cam if you go to 45's.
They all sound good ,even the 40's! And I've got mods to go with it but even my engine is mild by race standards.
Pintosopher
Ahh yea, but these motors just love some more cam lift (easy on the duration for a street car) and some cam timing to go along with those sweet carbs! ;D
Based on what you guys are saying if I'm not careful what I'm doing I can spend a lot of money and time and make a mess and be disappointed. So it looks like I should do some research. Do you have any reading material you could recommend?
Hopefully nothing too thick and boring! Any good 'How to' books you know of? Thanks for your input.
40 dcoe is a street carb. 45 dcoe is a race carb. Weber made them this way, and every thing built with Webers on them, came with 40's.