Anyone have any experience running this combo. I own one that I want to try. All I know about it is to keep the fuel pressure about 2 psi. Aside from that I’d be winging it. Thanks Sent from my iPhone using H.A.M.B.
I also own a 65 VW with dual 44 IDF Webers. I haven't gotten it running yet, but I know from research that the webers can be finicky and need expert adjustment. Also, they will run twin 48 IDAs on a 2 liter VW engine, so I'm wondering if 2 webers would be enough carb for an SBC?? I don't know the answer. You question probably has less to do with the intake manifold, and more to do with the ins/outs of running webers on a V8
Looks like the top of the carb are missing. If you're going to do it, might as well go all in. Not Mine, but a cool set of DCOE45's
That is actually not my setup. Just a picture I had. I kinda understand the Weber concept on each port. Not sure how they will run on a plenum. After checking the picture again those carbs are complete. Sent from my iPhone using H.A.M.B.
Those don't look quite right to me either. But if they're Weber's... IIRC Inglese has been doing Weber's for years. Problem worth a phone call. Done right, they're great, I've run them. Done wrong, it's a nightmare.
I do not believe that these are on a plenum. I believe that each barrel services only two cylinders. If, and only if, the runner design is correct in the manifold, then this is still essentially individual runner. If one barrel services two cylinders that are as far apart as possible in the firing, and thus intake order, then each barrel is effectively just feeding that cylinder, at that given moment. With 4-barrels to choose from, spread across the length of the manifold, this should be do-able.
If we labeled the barrels front-to-to back as A-B-C-D, working with the given firing order of 1-8-4-3-6-5-7-2, then the cylinder service order could be: A: 1,3 (separated by 8 then 4) B: 2,4 (separated by 1 then 8) C: 6,7 (separated by 5) D: 5,8 (separated by 7 then 2) It is not a perfectly even scheme, but it should work. A small balance passage would take care of any remaining flow issues.
Although, it does look like a plenum, but I cannot be sure: https://www.jalopyjournal.com/forum...n-sbc-dual-weber-idf-intake-manifold.1026917/
I probably need a plenum for a good vacuum signal for my trans. Could plumb it underneath I guess. I’ll take the carburetors off of mine and see how that chamber works Sent from my iPhone using H.A.M.B.
Pretty sure they are 48 ida’s. Haven’t actually identified them yet. 358 cid 9:1 lunati solid cam. Currently have three Rochester setup. Thanks Sent from my iPhone using H.A.M.B.
If, and it has been a long time since my VW days, my memory serves: 40s are 212 CFM, 44s are 290 CFM, and 48s are 340 CFM, with no modifications to the venturis. On IDAs, and some others, the venturis can be replaced, so, unlike most carburetors, you can tune the flow too! Stock venturis in 48s are 37mm, with 40mm and 42mm replacements being common,
I spoke with Jim Ingleese a year or so ago about a 4 Weber setup but didn’t want to spend 4500 bucks. He said something about “ choking them down “. I think that’s what he meant. Sent from my iPhone using H.A.M.B.
Yup. The vernacular term for Weber venturis is "choke". A whole lot of folks call them chokes. Back in the days when both Jim and I both still lived in Connecticut, I worked just up the road from him.
those may be delorto carbs drla i believe ,,get a book from cb or other vw companys , pending they are EXTREMELY adjustable , venturis air circuits etc.. can be ultimately adjusted for idle.in ethwe middle and on top plus progression rates , just put yourself on the big learning curve and dont give up !!!! i know a few things ,one they are a isolated runner carb, and two if ya have two cyls per barrel the carb thinks thats a plenum,, so you will have to figure it out ,, when you zing this type a carb they mist above the stacks so dont let that thing you are too rich ,, i have a friend with this exact setup ill ask him if he ever got his going ,, 2,5 to 3 lbs max for sure and air cleaners are easy as will be parts , check classifieds on a vw website called the samba there youll find jets venturis air correction jets everything basically their classifieds is big as ebay so its all there ,,, have fun ps the jet stacks just unscrew out of the top make SURE THEY ARE CLEAN the main is on the bottom theren theres a idle air and a air correction i think is the top one theres three pieces that click together if my memory serves me right they click together as a stack after ya unscrew them .smiles for miles fabricator john miss you dad
Ok thanks. They definitely say made in Spain on them. I’ll check the I’d numbers this weekend. Sent from my iPhone using H.A.M.B.
IDA’s are way bigger than IDF’s...CB was a big proponent of Dellorto carbs for VW’s. I had 45’s on my 2017cc and it was a good runner..and 48 IDA’s on my 2275..and it really ran..
Experience with two OT factory setups, both ran like scalded dogs! (1) 1600 cc (97 CID) 4-cylinder - pair of twin 40's (2) 2000 cc (121 CID) 4-cylinder - pair of twin 44's I AM NOT A WEBER EXPERT! But believe I would rather start with four rather than two on an SBC. Jon.
Just getting back to looking at this intake. Those carburetors are definitely on a Plenum. That’s what I wanted as I’m running an automatic and need a vacuum source. By the way, they are 40 idf carbs. Kinda small I guess but it’s a very mild sbc. Sent from my iPhone using H.A.M.B.