I am building a "Potvin" style GMC supercharger for a Studebaker V8. I will need to build most everything and that's OK. Moon agreed to sell me the chain coupler with the engine side unmachined. I have 3D model of the adapter housing being drawn up but to finalize it I need to wait for the coupler to arrive. In the meantime a mocked up my own adapter so I can work on the outlet side fabrication. The intake runners are a no-brainer. The pressure relief box is also easy but I would like to build one that is interchangeable with the original. Anyone got one out there off a 471 or 671 that they would sell or get me dimensions from? Jon
Try Brian Foley, 1-207-363-2569. I sold Brian a pressure box a few years ago, and he may still have it.
I love what your doing, that timing cover adapter will require some substantial reinforcing to deal with all the forces and weight. Here's a SBC Potvin set-up with a heavy cast timing cover adapter similar to what you require. Best of luck, look forward to updates
Maybe someone here can school me on the fuel pump drive. How is the center mounted fuel pump actually driven, being mounted in the center of the cover?
What are you doing for the intake end of this Frankenstein? May I suggest a Smoljan intake. Dave (information below) is making repops of these for Stude motors. Wouldn't be to hard to machine the carb mounts flat and install a flat plate trimmed to fit. Dave Thibault casts a very nice repro Smoljan triple deuce intake especially for the Stude. Dave Thibault 13 Nick Lane Maynard, Maine 01754 (978) 897-3158
Yes, the Smoljan repop could be made to work but since Jon makes and sells a pair of adapter plates to mount any SBC intake, including the Potvin, on the Studebaker V8, that's a no-brainer. jack vines.
It will be easier and cheaper to just make my own intake runners from stainless. If I make it from aluminum I gotta farm out the welding and buy material. If I do it in stainless I can use the scrap from years in the business and from the scrap bins at work and I have equipment to weld it. I know how to weld aluminum and well but have not got a machine at home to do it. Stainless can be thinner so there is little weight difference, (actually lighter). Estimated 11.5 lbs. for aluminum vs. 10.0 lbs. for 304LSS. I have built a tri-power on Dave's intake and a second "Smoljan" was the base for my traditional 471 intake. The Weber set-up is SBC on Jeff Rice adapters. Jeff's hand made adapters were the prototype for CNC version I sell. I am just wanting to build something kind of old school with a few modern twists.4545971[/ATTACH] 4545969[/ATTACH] 4545970[/ATTACH] JK
I have made great progress this summer. The adapter 3D model is done and out for quote. The adapter in the photos is still wood. All the intake and water plumbing it done. F.A.S.T ignition is ordered. I have a "Maxx" brand distributor with an MSD "phasable" rotor on board. I am working on the fuel rails now. We're getting closer but still a ways to go. It has turned into a bit of an obsession but I can think off worse things, . Current photos attached. JK
Man.............you just "brag'in" now!!!! J/K Looks pretty sweeet! Can the blower ONLY be run 1:1 or..........?? Carb(s) of FI?! Nice 6sally6 PS...................Why a Stude??............Just Because.
I just have to do the Stude because it was overlooked when the Potvin's were made. All Stude V8s have a forged crank and rods so they can take the boost. Their heads are not the best for a naturally asperated motor but their McCulloch / Paxton superchargers made them fly. The motor will have about 8 PSI boost with a 471. If you want more boost just go to a bigger X71! The main point of the build is to do something no one else has done, have fun and make it work. It's all on the "Racing Studebakers" site. JK
I have some serious progress pictures to post. The 3D model of the adapter was completed and printed in plastic, it fit perfect. I won't bore you with photos of that because... I sent the 3D files out for quote to machine in T-6061 and the price came back at $1650.00 including material. So it was game on, an order was placed and I picked it up two weeks ago. It also is a perfect fit. The adapter is all dowel pinned together and to the blower. You rely on the coupler to align it with the motor. The next step is to re-key the crank and have that half of the coupler machined for a snug slip-fit. More to follow in a few weeks. JK
Did you have a local machine shop make the adapter? Or did you use an online machine shop? Seems like a reasonable price.
Oh my.That is delightful.This looks like fun.I`ll saddle up and go along for the ride. Good luck.Have fun.Be safe. Leo
I live in Fort Atkinson Wisconsin. The machine shop is in New Berlin, less than an hour away, W&S machine. The assembly is three pieces all bolted sequentially to the blower and then it slips onto the motor via a chain coupler. The orange half is a 3D printed plastic for fit-up. The steel piece shown needs to be machine to slip fit on the crank, that will happen next week.
The individual parts are also o-ringed and have stainless steel thread inserts for strength. I assume I will need to disassemble this at least six or more times before it sees fire so I do not want to deal with a stripped aluminum thread. They are a step up from a Heli-coil. It was not a big cost adder machining wise and the inserts are only a couple of buck a piece so it's cheap insurance. JK
I forgot to mention that this was made by the same shop the makes the adapters I sell to put a small block Chevy intake on a Studebaker. I am also working on the same adapter to put the SBC on the early Caddy motor but that's another thread. Later, JK
This is cooler than the other side of the pillow. Can't wait to see what you have in mind for a vehicle.
Will you be pruning the blower case? I’ll be doing mine soon. Planning on using a rotary table at 90° on my Bridgeport for the ribs. Not sure how this process is typically done.
I will probably get in trouble with the "Buy American" crowd but my neighbor who is building a very non-Hamb friendly car gets his special one - off parts made for him in China for a very good price. He sends off his computer aided plans and the box arrives at his door.
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