I have an early cast iron sbc intake that I need to identify. I need an adaptor plate to fit it so I can run a Edelbrock carb. Problem is I can’t seem to find one! Here is a pic of it and a paper rubbing that might or may not help. The casting number is: 3783244 I have purchased two adaptors so far and neither fit. Can anyone positively id it for me and point me in the right direction to get an adaptor? I’m in the UK so getting parts sent can be expensive so I need to get this right. Many thanks Sent from my iPhone using H.A.M.B.
https://www.speedwaymotors.com/Holl...ter-4G-4-Jet-Carburetor-Adapter-Plate,69.html looks like a 4GC intake, to me...but could probably have also been used with the wcfb
Dad gum Squirrel , If I hadn’t read your handle there,,,I wouldn’t have recognized your new avatar pic ! A man of a thousand faces indeed ! Tommy
Make sure whatever spacer (and gaskets) you use can handle the heat from the exhaust crossover holes.
Thread tap the hole and correct size allen set screw locktited in or allen pipe plug, in whichever size comes the closest, will handle that issue.
I am running one of those intakes now. I made my own adapter plate from 1/2" aluminum plate. I plugged the exhaust holes with the proper sized "frost" plugs (I don't remember the size anymore). Gary
Well, your profile says you're working with a 283, and you're over in the UK. I'd try and find a 348 that had a WCFB or 4 jet/4GC; E-Bay's your auto parts store in this case. Offenhauser adapters tend to be solid aluminum; none of that recessed bolts/studs/nuts/washer-affairs that don't seal very well. I am Butch/56sedandelivery
Hi Gary, Thanks for your reply - I have been thinking of doing the same as it would probably be cheaper than getting one sent over! I would be interested to know what carb you run - I assume a 500 cfm? Sent from my iPhone using H.A.M.B.
Thanks for your reply, I really appreciate everyone that responded. I had seen the adaptor on the Speedway website, part #1351935 and thought that it would be ok but it kinda looks a bit ‘weak’ and on one of the reviews a guy said it cracked through the mounting holes with less than 4lb of torque! Also: they do a # 1351935B adaptor that looks like it would fit too - all depends on identifying this inlet correctly. Sent from my iPhone using H.A.M.B.
Thanks for your reply. Unfortunately I don’t think the Offy adaptor will fit as it leaves a gap as it overhangs the carb mounting platform on the right (if viewed from above) Like you say, I’m concerned that the ‘recessed bolt affair’ adaptors may be the proverbial pain in the ass to seal up! Sent from my iPhone using H.A.M.B.
Thanks for your reply. This is interesting as when I picked the intake up the guy selling it said it came off a 60’s 327. You will have to excuse my ignorance but what does ‘application B’ mean? Does it simply mean ‘passenger’ car or something equally as dull? Sent from my iPhone using H.A.M.B.
Too bad you don't have a stateside contact you can find the Edelbrock 2101's on craigslist under $50 all the time and forget using an adapter.
Aren’t the WCFB and Q jet completely different designs? I always thought the Q jet was a larger spread bore design? Sent from my iPhone using H.A.M.B.
This is not a Qjet intake. But it was used with the Rochester 4GC carb. So if you find an adapter that works with the 4GC, then it should work on this intake.
Offenhauser #5282A. Has the AFB/Holley pattern, and another smaller pattern to bolt it to I "think", a flathead using some countersunk bolts (those you don't use). Use the "inboard" AFB pattern, then drill them out, use long studs, and if the AFB carburetor does't have those holes in the base, then drill them. I have three of those adapters. I am Butch/56sedandelivery.
I'm not sure about running the aluminum adapter with the carb heat holes in that manifold. The 4-jet Rochester and WCFB were iron bases. Never done it. Lippy
Up until today, I ran a Summit 600 cfm carb. I changed it to a Holley 570 Street Avenger I just took off my other car. This is on a 305" engine. Gary
As has been previously mentioned, the exhaust ports in the carburetor flange on the manifold need to be addressed: (1) tap for Allen-head plugs OR (2) an original stainless steel flange baffle One or the other will be required if you attempt to use an aluminum adapter. Have you considered either the original Carter WCFB or Rochester 4-GC as your carburetor of choice? Fits the manifold. And both are excellent carburetors in both performance and especially reliability. Jon
Thank you for that info Butch. The problem for me is being in the UK. By the time I’ve purchased the Offy adaptor the price will triple with shipping and custom taxes! Even buying the correct gasket for this intake becomes cost prohibitive because most Speed shops work a standard overseas shipping rate. I have convinced myself that the quickest way over this problem is to fabricate an adaptor/spacer plate, probably 2” tall to give the motor some height as it’s going in a 28 Roadster. A couple of hours on the mill should have 8 holes drilled and I can open the tops of the bores with a die grinder and smooth out with a file. I already have a newish Edelbrock carb to sit on top. As it stands - this is the plan for now Sent from my iPhone using H.A.M.B.
Thank you Jon, I have taken note of your concerns about the exhaust ports and will get them sealed. As mentioned, I have decided to fabricate my own adaptor and spacer for the Edelbrock carb that I have. A 2” spacer should help to disperse any heat from the exhaust ports and like I said give the whole motor a ‘lift’ to help fill the engine bay space! I hear what you say about using a stock Rochester or Carter carb - it makes a lot of sense. Problem is, where you guys might be tripping over stuff like that in your garages, parts like that can be difficult/expensive to find in the UK. Every Ebay carb purchase normally ends with missing bits or broken castings, and once you’ve finished, its ended up costing way more than a new unit with a 3rd of the expense being the shipping costs Interestingly, I ran this 283 in my Roadster previously using a Charlie Price adaptor plate and two new Stromberg 97s - so as you can see, I like to do things the hard way!! Sent from my iPhone using H.A.M.B.
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