Has anyone here ever put a McCulloch Blower on a straight 6 235/261 full pressurized oiling system motor? If so, would you mind sharing if it is worth it or not and if you had to upgrade the motor itself to handle the psi? Or if maybe only getting 4-6 psi, would the motor be ok? Any input or info would be very helpful as I was thinking about doing it with my 1961 Chevy 261 motor. Thanks Jeff.
Well, I started to do what whitestang asked about...but, I never actually finished it to know if it was worth the effort. Was kinda concerned about only getting 4-5 pounds of boost on a motor I had built to handle much more. Ended up putting a GMC 8V53 making 10-12 psi boost on it instead. It ran so well I never looked back. OK, I didn't realize this was a very old thread.
Many years ago, a vendor at Carlisle had a McCulloch supercharger and ***ociated brackets that was supposedly available in the '50s in kit form for the early six cylinder Corvettes.
Not a McCulloch, but Jahn Badimere Sr adapted a 4:71, I think, to early Chev. 6 cyl. Ix̌ve only seen one, and I believe it is now owned by one of the Bandinere kids. In a '56 sedan delivery. There was also a guy from Texas who, several years ago, was marketing a kit to install the small B&M blower on a 235, 261.
~5psi won't get/give you bragging rights, but it *will* wake-up the mill. Factory level quality should be fine, as long as the mill is in very good shape - *all* of it. In the past, say 40's on-up, ~ 6psi was considered ok for factory mills, until the mills got really decent compression. One thing I'd do, is to make sure you've got ~.040"-maybe- .060 piston-to-head clearance, for proper squish - something the mills-of-old didn't have much of. Will help control detonation, since it acts as "artificial" octane. The usual timing retard w/boost, & proper jetting apply. This can be done mechanically, if you really want to, read the long blog/build-up of TurboStude, for good ideas. He did use small turbos, but it still works w/low-level boost. & forget an intercooler - not needed below 10+psi. *If* you find you - maybe - need some kinda cooling, look to water injection, fairly easy to diy. Guessing you won't need it. Stude used this to good advantage, as did Kaiser, even Ford. The 250+/- cid is about the correct cid size for these blowers. Stude used them up to 304, but mostly on 289, also Ford used on 289, Kaiser's was ~ 250+(don't remember, & too lazy to look up exact#s). ;D . You *don't* need a pressure-box, unless you crave the *Looks*, they're a pia. Just use a proper carb hat & seal the carb correctly. Look up "Blow-Through" carbs. Also don't need to rev to the moon to get useable torque n hp, just use the factory redline, unless you want abit more. Btw, I'd use good quality valves & valvesprings, just because... Marcus...
Hunter Perf. is probably history. I don't have a contact name, not absolutely sure Texas is correct. I have the only one I've ever seen. He made 235 etc. to later Chevy trans. adaptors as well. If you search HAMB parts for sale using my name, Eddie, go waaaaay down the listings you will find a pic. in 261 ad. Eddie 706-835-5990
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