Weber Carbs 4/48mm down draft question
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
Weber Carbs 4/48mm down draft question
I just purchased a Weber set up for my engine. I have been wanting one for a long time. Found one on ebay for a good price. Has verything but the brackets to hook up the linkage to my cable. Anyone have experience with this? Some of the on line Weber dealers have not been helpful. The setup came complete with 4 dual 48mm IDF carbs, polished aluminum intake, vacumm kit, linkage, fuel lines and gauge and 4 K&N air cleaners. I would kill for a picture showing the actual cable hook-up.
Pro
Joined: Jun 2004
Posts: 689
Likes: 66
From: Juneau AK
Gotta have pics!!! I assume this is going to be a "hole-in-the-hood" situation? Or is this a side-draft type setup?Sorry I can't help with the linkage... 3 deuces, pair of quads, that I could help with but I've never done the Weber setup.
kdlp
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
These are powder coated yellow on a polished alum manifold. I have quite a large cowl induction hood. Will not need a hole. I have a picture I can post tomorrow. I have not received it yet but I do have the ebay pic at my office.
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
Cool 
good thing you got the idfs, the idas are not that great for a street car.
Your setup works with a bell crank in between the carbs, this is pretty similar to how old mechanical hilborn injectors throtthe setups are set up. Just connect the throttle cable to the other ear of the bell crank, you need to get a cut to length throttle cable, I don't know if you can buy the appropriate bracket
To tune them you will need at least a manometer (multi column, commonly used for motorcycles) or a unisyn
Must be this one? NICE
good thing you got the idfs, the idas are not that great for a street car. Your setup works with a bell crank in between the carbs, this is pretty similar to how old mechanical hilborn injectors throtthe setups are set up. Just connect the throttle cable to the other ear of the bell crank, you need to get a cut to length throttle cable, I don't know if you can buy the appropriate bracket
To tune them you will need at least a manometer (multi column, commonly used for motorcycles) or a unisyn
Must be this one? NICE
Last edited by Twin_Turbo; Feb 1, 2007 at 04:42 AM.
Team Owner
Joined: Nov 2004
Posts: 20,703
Likes: 25
From: Sorrento Italy
Cool good thing you got the idfs, the idas are not that great for a street car.
Your setup works with a bell crank in between the carbs, this is pretty similar to how old mechanical hilborn injectors throtthe setups are set up. Just connect the throttle cable to the other ear of the bell crank, you need to get a cut to length throttle cable, I don't know if you can buy the appropriate bracket
To tune them you will need at least a manometer (multi column, commonly used for motorcycles) or a unisyn
Must be this one? NICE
good thing you got the idfs, the idas are not that great for a street car. Your setup works with a bell crank in between the carbs, this is pretty similar to how old mechanical hilborn injectors throtthe setups are set up. Just connect the throttle cable to the other ear of the bell crank, you need to get a cut to length throttle cable, I don't know if you can buy the appropriate bracket
To tune them you will need at least a manometer (multi column, commonly used for motorcycles) or a unisyn
Must be this one? NICE
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Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
Yup, that is the one. Yes, I am planning on buying the Unisyn tool. I am sure I will need to do some tuning for my 427. I have a couple of books on the way as well. I also have a LM-1 wide band O2 analyzer. I just put a bung the other pipe as I will now have to check both sides. If I have to make a bracket that is ok. I am using a homemade one now. I just will have to be a little more creative I guess.
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
I have a diagram of the carb and there appears to be small vacuum ports on the side of each barrel. Could tap into those and take vacuum readings with the manometer. I would think that would be a great way to do it without choking the air flow.
Advanced
Joined: Feb 2006
Posts: 82
Likes: 1
This place will help you, I can't remember the tech guys name but they will have everything you need.
http://www.inglese.com/
Here's mine, I have the 44's on an Inglese intake.
http://www.inglese.com/
Here's mine, I have the 44's on an Inglese intake.
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
... pierce manifolds sells them and inline weber also) so you can do 1 bank at a time.Thanks to you guys I now have downdraft envy, I just love IR setups, being sidedraft, old school mech injection or these downdrafts.......hmmm I know of a quad 48 IDA setup for not too much money....
I shouldn't have sold those IDF 48s I had lying around 
Last edited by Twin_Turbo; Feb 1, 2007 at 09:50 AM.
Melting Slicks
Joined: Nov 2003
Posts: 2,362
Likes: 1
From: San Antonio TX
I like the Deluxe Synchrometer under BugPack Products Part no 7034-11 since it makes a much better seal to the carb than the universal one. I have used this one as well as the unisink or some call carburetor sticks like for motorcycles or you can even use eight vacuum gauges as well just mount them on a board. The use of these items is not for jetting just to set each throat up for the same vacuum and to set up the throttle linkage to keep everything the same. And as for Jets I would do some research and try and hit up some people on the board here to see what jets they have for there set up as the Weber has many jets and none of them are cheap lol.
