I have 292 y block out of a 56 truck that I am putting a mcculloch supercharger on. It has a Carter wcfb carb on it and I am looking for info on how to make it blow through. I know the fuel pressure has to be referenced. Don't know about the distributor and the timing. It has a vacuum advance. I read some distributors also have mechanical and vac together. Also read I may have to pressurized the back side of vac advance and wondered if that would work. Any info would be helpful and appreciated. Also any where else I could look. Thanks
I looked into this and gathered parts to modify an Edelbrock, I bought an air/fuel gauge, a vacuum/pressure gauge and a fuel pressure gauge, found a Studebaker fuel filter/pressure regulator, foam floats, marine plunger, larger inlet.. I haven't done it yet but it looks pretty basic here's a link to somebody else's how to: Edelbrock Blow Through
Speaking of A McCulloch supercharger. I found a gauge a couple of years ago that is a McCulloch item with a blue goose logo on the face. It does reference both boost and vacuum on the same dial. This may indicate that you are on the correct track in regards to both pressure and vacuum being needed together in your application. Just a thought as I have little knowledge regards superchargers.
The easiest way is the paxton "igloo" box although it wouldn't really have a 50s look to it. You can basically just tune via jets but you really would want boost-referenced power valves if you plan on street driving much. A jets only deal is primarily for a WOT only setup similar to a mechanical fuel injection setup. Nitrophyl floats are required as well. theturboforums.com has a giant blow-through section. I converted a standard holley 650dp years ago with a extreme velocity hat and a turbo and had some time and a couple of bucks in it and ended up with just over 500rwhp on 93 pump gas and a built up ford 302.
The Studebakers with a supercharger had a lower compression ratio than the ones without. I never tried to supercharge an unsupercharged engine so I can't say how much pinging and piston damage will occur, but it may be something to think about. Dave.
There is a web site VS57 that has the most info on this. Possibly the most popular car for McCulloch installations in the fifties, was 2 seater Tbirds and Fords with Y block engines. Mostly in California. The parts turn up from time to time on Ebay and other places. You need to pressurize the fuel pump and an electric pump for more volume. Pressurize the float bowl. Seal the throttle shafts. There are other mods too. More details on VS57.
has anyone heard from John erb? He is a master at these McCulloch blowers. he has one of mine but I haven't been able to get ahold of him. anyone talk to him lately??
My old car buddy 28rpu on here sent John Erb as VS57 over a year ago sometimes he calls him and the reply is it will be ready next week !
the supercharged 312 had 8.6 to 1.....and the 270hp 312 had 9.7 to 1....according to the sales brochure...
FYI, After 22 months of waiting and tons of phone calls, I now have a John Erb built supercharger in my possession. Best of luck to anyone waiting on theirs.
Easy peasy. Carb hat, boost referenced fuel pressure regulator, fuel pump capable of putting more pressure out than you're putting into the carb. I ran mechanical advance only. Sealed the carb so pressure didn't leak out. I ran points forever until the distributor shit itself.
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