I was watching one of the car rebuild shows the other day and they kept talking bout putting 2 carburetors in the thing,,,and were would you put another carburetor...,,what would be the purpose,,  

would that work on the 63 64 cadillacs???    it does seem that getting one set properly can be  a sometime challenge, how wold you get two to work ... 

Views: 325

Reply to This

Replies to This Discussion

There is no setup for the 63 and above to run dual carbs. 62 and below have an take manifold so you can run dual carbs.

Running dual carbs is more of a status statement with Cadillac, than it is with performance.

Not getting into the pros vs cons of multi-carb set-ups, but this did trigger some thought I had on this way back on multi carbs on the 63/64 Cadillacs.  
In the 1966, 67 and 68 Master Parts Book parts group 3.265 the intake manifold for single carb applications have a different intake manifold from 59 to 62 (part # 351 2079) vs the 63 to 66 intake (part # 363 2870), yet in the 1969 Master Parts Book it lists 59 to 66 as the same intake part # (363 2870). I know the cylinder heads have the same mounting areas since the 1958 to 1963 heads were the same, however, I also know the engine block physically and dimensionally changed between 1962 and 1963 with the core block reducing length and height. I don’t know if the core block change altered the relative position of the intake on the heads and if it would be a straight bold up, but it seems going with the 69 Master parts book you can use the earlier multi-carb intake manifolds on our 63/64 Cadillacs.

Of course you would have a lot more work cut out for you in terms of accelerator linkage, fuel lines, air filter(s), etc.  If you were after all out performance the EFI and fuel injections options should produce the best power and performance gains, however, for Old-School Cool it would be neat to see a dual or triple carb setup on a 63 or 64. If someone knows for sure I would like to know so I can update my notes.

Understand,,,, i hv NO interest in pursueing such an endeavor,   i was just curiuos as to what it woukd provide you.   Is it power?  Engine rumble?  Im guessing not fuel ecomomy, so as Russ mentiined,  is it just a cool factor ...  and normally, on the drag race tv shows,   i dnt see too many 5300 lb caddys toeing  the line for a drag race.it seems the shows either flaunt the dual 4 bbl. Or the new FI systems on the older 60s and 70s restorations.   

A properly designed and tuned dual carb setup can provide better fuel distribution and performance since the carbs can more evenly distribute the air/fuel mixture down the length of the engine cylinders.  If combined with a tunnel ram or hi rise intake is can also provide better fuel dispersion.  With a dual carb set-up you will run considerably smaller CFM rated carbs. For example if you were running a 850 cfm single carb you might run a pair of 450 cfm carbs on a dual carb setup. With a 750 cfm carb, you might run a pair of 390 cfm carbs.  Of course everything has to be dialed in perfectly to really take advantage of the potential of a dual or tri-carb setup.  There is a lot more up front cost and setup to consider, not to mention the additional maintenance of keeping multiple carbs tuned.   Of course multi-port, and direct port computer controlled fuel injection takes this distribution tot he extreme … but there can be some advantages of an 2 or 3 carb setup over a 1 carb setup since the questions was asked.
There is also the COOL FACTOR. It just looks cool to some of us old timers to see the 2 or 3 carbs sitting up there, especially when they are dialed in perfectly! If you want all out performance, look to fuel injection; however, for around town "cool as Fonzie" cruising, the dual carbs would look great...and could perform nice if set up correctly.

I have a pre 62 dual carb intake. I'll have to see if it fits the 63/64 engine assembly.

RSS

Photos

  • Add Photos
  • View All

Forum

Modern radio antenna …

Started by Mack in 1963/64 Cadillac Specific Discussion on Tuesday. 0 Replies

Just replaced radios for the modern radios with Bluetooth and all the dance things and wanted to share how I went around the antenna knob… I’ve installed a regular two way GM window switch in the…Continue

BOOT

Started by John Inglesby in 1963/64 Cadillac Specific Discussion. Last reply by Marty Smith on Tuesday. 1 Reply

I recently purchased a new boot for my 64 convertible and was wondering how difficult it s to install. I'm not very mechanical. It looks like the chrome piece behind and at top of seats needs to be…Continue

63 Exhaust Hanger Mystery

Started by Mike Travers in 1963/64 Cadillac Specific Discussion. Last reply by Cees de Bunje on Monday. 8 Replies

I'm in the process of installing a stainless steel single exhaust from Classic Exhaust on my '63 Coupe de Ville. I'm running into a mystery regarding my middle exhaust bracket. I have the bracket…Continue

TH400 Dipstick Tube Seal

Started by Logan Robb in 1963/64 Cadillac Specific Discussion. Last reply by Logan Robb on Monday. 9 Replies

In my “rebuild” of the transmission, I ordered a dipstick tube seal. However, I’m not sure if the right one came or how to best install the seal. I am wondering if anyone has replaced this seal OR…Continue

Blog Posts

Loud air moving sound within carb with cleaner removed

Posted by Dave Fehrle on March 23, 2024 at 3:23pm 8 Comments

While checking my Carter carb with engine running, I took the air cleaner off and there was a very loud hissing sound of air. I placed a piece of paper over the carb and it didn’t move up or down, is this normal?

Vintage Air AC

Posted by Chase on March 21, 2024 at 5:55am 0 Comments

Hey everyone, has anybody done a Vintage Air AC/Heat setup in their car? I want to bypass the old vacuum setup and go with a Vintage Air Gen 2 model. Before I get started, does anyone have any experience with this? (Which model to go with, do’s and dont’s, etc.) It looks pretty involved. Any and all info/pics would be greatly appreciated. Thanks!

accumulator dryer

Posted by CHRIS CARLSON on December 6, 2023 at 10:54am 0 Comments

Who rebuilds original AC  accumulator dryers for 1964 Cadillac? I have been on Classic auto air in Tampa FL wait list for over a year ,  There is one on Old air products web site that looks very similar to the original # 21-4214A but states it fits 1962 Gm cars, The one recommended for a 1964 Cadillac is half the length 21-4215A    What  is everyone using ? I would prefer to be as original as possible. Thanks

'63 Eldorado trumpet horn + 2 standard horns restoration

Posted by Les Eastling on November 15, 2023 at 10:34am 1 Comment

My son, unbeknownst to me, had all three of the horns on our 1963 Eldorado completely restored. We had recently added the Eldorado trumpet horn to the two standard horns and the sound was not very good... we had heard good ones so we knew something was not right... but there was not much we could do to get better sound from the 3 horns. 

There is a restoration service called The Horn Works who my son…

Continue

Videos

  • Add Videos
  • View All

© 2024   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service