DCOE Webers
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Joined: Mar 2007
Posts: 84
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From: Glenvale Queensland
Thanks for the input guys. That was exactly what I needed to know about the vacuum setup, I though I may have to take vacuum from all of the manifold runners. I found a pic on the net that showed a side draft manifold that had been plumbed underneath from each runner, but I forgot to save it and now I can't find it again. I have a mechanical dizzy and the car dosn't have power brakes, so I only have to feed the vacuum system.
The setup I'm looking at has 45 DCOE's. The engine I have is basically stock with a good set of headers and exhaust, and a good ignition system. I plan on replacing the engine with something a little better before I fit the webers. I'm not planning on going racing, just after good street performance and driveability. Any idea what sort of maximum horsepower the 45's are able to supply.
Doug
The setup I'm looking at has 45 DCOE's. The engine I have is basically stock with a good set of headers and exhaust, and a good ignition system. I plan on replacing the engine with something a little better before I fit the webers. I'm not planning on going racing, just after good street performance and driveability. Any idea what sort of maximum horsepower the 45's are able to supply.
Doug
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Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Thanks for the input guys. That was exactly what I needed to know about the vacuum setup, I though I may have to take vacuum from all of the manifold runners. I found a pic on the net that showed a side draft manifold that had been plumbed underneath from each runner, but I forgot to save it and now I can't find it again. I have a mechanical dizzy and the car dosn't have power brakes, so I only have to feed the vacuum system.
The setup I'm looking at has 45 DCOE's. The engine I have is basically stock with a good set of headers and exhaust, and a good ignition system. I plan on replacing the engine with something a little better before I fit the webers. I'm not planning on going racing, just after good street performance and driveability. Any idea what sort of maximum horsepower the 45's are able to supply.
Doug
The setup I'm looking at has 45 DCOE's. The engine I have is basically stock with a good set of headers and exhaust, and a good ignition system. I plan on replacing the engine with something a little better before I fit the webers. I'm not planning on going racing, just after good street performance and driveability. Any idea what sort of maximum horsepower the 45's are able to supply.
Doug
Engine / Car Approximate HP Carb or Carbs Starting Choke Tube Size
Datsun Z 2.8 - 3.0 250-280 Triple 45 DCOE 36mm
Datsun Z 2.4 - 2.8 200-250 Triple 40 DCOE 34mm
BMW 2002 130-140 Dual 40 DCOE 34mm
BMW 2002 150-160 Dual 45 DCOE 36mm
BMW 2002 130-140 Single 45 DCOE 36mm
BMW 2002 120-130 Single 40 DCOE 32mm
Toyota 22R 140-150 Dual 45 DCOE 34mm
Toyota 4AGE 130-140 Dual 40 DCOE 34mm
Porsche 914 2.0 120-130 Dual 40 IDF 32mm
Porsche 914 1.8 110-115 Dual 40 IDF 30mm
Mazda RX7 Stock Engine Single 48 IDA 42mm
Mazda RX7 Street or Bridge Port Single 48 IDA 44mm
Drifting
Joined: Oct 2005
Posts: 1,527
Likes: 148
From: East London/SW Essex UK
There is also the Dellorto equivalent to the Weber, which may (or may not) be easier to source parts for. The Dellorto carb does have a reputation for catching fire however! (probably due to few owners using an air filter) Does this problem apply to Webber too?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
It's the same on my hot rodded Vette. I probably work more hours on it than hours driven. I had a fuel leak fire on a four barrel years ago
Drifting
Joined: Oct 2005
Posts: 1,527
Likes: 148
From: East London/SW Essex UK
IMO - From what I've seen. It is the complexity of the fuel lines. Like on V-12 you have 6 two barrel webers. The fuel rails have to be perfectly mated to prevent fuel leaks. These are higher maintenance setups that you have to be looking at and checking. Why do you think in years past that nearly all rich people had a private mechanic.
It's the same on my hot rodded Vette. I probably work more hours on it than hours driven. I had a fuel leak fire on a four barrel years ago
It's the same on my hot rodded Vette. I probably work more hours on it than hours driven. I had a fuel leak fire on a four barrel years ago
The fire 'thing' happened to a guy I know with a GT40 replica (with Dellortos) the first thing he knew about the fire was when (fortunately in slow moving traffic) passers-by alerted him to it. Because the engine in in the rear he didn't notice! Luckily he had a fire extinquisher on board (as anyone with a 'glass' car should have)
Instructor
Joined: Sep 2007
Posts: 198
Likes: 0
From: Colorado Springs Colorado
Doug 61,
Here's that vacuum set-up picture you were lookin' for:
http://www.inglese.com/Products/General_Motors.asp
(Click on vacuum system)
Belgian1979'
With fuel injection, do you get as much backfire as with a Weber set-up?
Here's that vacuum set-up picture you were lookin' for:
http://www.inglese.com/Products/General_Motors.asp
(Click on vacuum system)
Belgian1979'
With fuel injection, do you get as much backfire as with a Weber set-up?
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
My dad's '83 Suburban did that in '88 - the Q-Jet lines dumped a bunch of petrol on the hot engine, almost burned the truck up which would have taken his brand-new (and not yet paid for) '88 2500 pickup with it. I've never seen a car salesman move that fast, and the dealership never did find the pin from the extinguisher after he threw it.
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Drifting
Joined: Oct 2005
Posts: 1,527
Likes: 148
From: East London/SW Essex UK
I am going to pose a question here.
A do you go with 'old school' 4 x 2V Webber or Dellorto set-up or
B Kinsler 8V downdraft electronic injection set-up ?
Street 'cred' is about the same, usability? cost?
A do you go with 'old school' 4 x 2V Webber or Dellorto set-up or
B Kinsler 8V downdraft electronic injection set-up ?
Street 'cred' is about the same, usability? cost?
Team Owner
Joined: Apr 2002
Posts: 62,198
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From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
THe Kinsler get up will run you 9K for the manifold and linkages. Probably another 3K for the computer and wiring.
I called and asked.
You can pull off a weber get up for 3K or so.
I called and asked.
You can pull off a weber get up for 3K or so.
Burning Brakes
Joined: May 2001
Posts: 1,102
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From: spring city pa
Sheesh , After reading about all the problems and poor performance with these systerms, I better get rid of my setup . Tuning is a breeze as is jetting the weber . You can get jets and emulsion tubes for a lot less than a 100$ . Intake runner pulsing is a thing of the past if you know what cam profile you need , timing is critical to remove carb sneezing [ backfire ] ! Aircleaners have nothing to do with sneezing or fires . I have not adjusted these carbs for app. four years .
gman
gman
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Sheesh , After reading about all the problems and poor performance with these systerms, I better get rid of my setup . Tuning is a breeze as is jetting the weber . You can get jets and emulsion tubes for a lot less than a 100$ . Intake runner pulsing is a thing of the past if you know what cam profile you need , timing is critical to remove carb sneezing [ backfire ] ! Aircleaners have nothing to do with sneezing or fires . I have not adjusted these carbs for app. four years .
gman
gman
Burning Brakes
Joined: May 2001
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From: spring city pa
gman
Melting Slicks
Joined: Sep 2003
Posts: 2,114
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From: ct
Sheesh , After reading about all the problems and poor performance with these systerms, I better get rid of my setup . Tuning is a breeze as is jetting the weber . You can get jets and emulsion tubes for a lot less than a 100$ . Intake runner pulsing is a thing of the past if you know what cam profile you need , timing is critical to remove carb sneezing [ backfire ] ! Aircleaners have nothing to do with sneezing or fires . I have not adjusted these carbs for app. four years .
gman
gman
Then run just fine and I have not touched them in over a year. They just are not worth the money for what you get out of them.
Burning Brakes
Joined: May 2001
Posts: 1,102
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From: spring city pa
I agree on the prices from both inglese and pierce being quite high .That was the main reason I did not buy a completed setup but rather shopped around for the components .I got the carbs from jam engineering on the west coast for a good price for the four of them . They came with 36 mm chokes , a bit on the small side . I put a watch on ebay for jets, etc and purchased an assortment for a good price . I got a hold of some 40mm chokes and made a fixture and bored them to 42 mm . The other small parts hoses etc I assembled myself . The two vendors I mentioned want to sell info and that is very understandable but I,m a cheap geezer . I would have bought bigger webers but at my age I really did not want to operate in the 6k plus rpm range . Cam and timing curve is crucial for webers .
Gman
Gman
Melting Slicks
Joined: Sep 2003
Posts: 2,114
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From: ct
What cam spec do you have and what size motor? I think my cam is 248@ 50 and 510 lift soild lifter. I was told it was about max I could go. Like I said it runs good. The idle circuit is set up real good. But at about 5800 rpm it just runs out. My cam and heads want more but it just won't go there.
Burning Brakes
Joined: May 2001
Posts: 1,102
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From: spring city pa
Team Owner
Joined: Apr 2002
Posts: 62,198
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From: All humans are vermin in the eyes of Guru VA
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Cruise-In V Veteran
I dont think you would be violating forum rules.
The specs of YOUR motor belong to YOU. The knowledge in your head belongs to YOU.
The specs of YOUR motor belong to YOU. The knowledge in your head belongs to YOU.
Safety Car
Joined: Jan 2001
Posts: 3,637
Likes: 27
From: Norwalk Ct
I'm running quad 48MM DRLA Del'lorto's with 46mm venturis, has no issues feeding my 396 small block. Tuning is a breeze if you take your time and pay attention, fuel pressure is very important.
I order most of my stuff direct from dellorto in the UK, its not that expensive (deffinately not cheap), but has crept up a little in the past year due to the weak $.
Nick
I order most of my stuff direct from dellorto in the UK, its not that expensive (deffinately not cheap), but has crept up a little in the past year due to the weak $.
Nick