Welding supercharger cases together

[kelzweld]

I've been asked to weld two 6V71 supercharger cases together (end to end) to efectively get a 12V71. The owner of them says he can couple the rotors and I only have to join the cases. My main concern would be warpage causing misalignment, which would pretty much stuff the blowers. I know I can bolt them to heavy plate while they're being welded but still have concerns. Has anyone ever done this, or seen or heard of it being done sucessfully? Do you think dowelling and bolting the cases together would be better?

[madcow]

dont know if this helps or not. but we weld snowmobile crankcases together. you can take a 2 cylinder engine. cut a half a cylinder off of each engine and weld them together to get a big 3 cylinder. use a steel plate on the top and bottom. tack around and then jump around and weld. what they do is weld a bead on this side then on the other side and get it all welded.

dont know how much help that is but never have to many problems with cranks.

also if you do a true job once he has it bolted down to the engine it should help eliminate twist.

he putting this on an allison engine?

[kelzweld]

An Allison would be cool, but no, its a 460 Ford. Heres a pik of the project. As a secondary thought, do people repair cracked blower housings, or are they junk when cracked?

[BBchevy396]

DANG!!!

[shorerider16]

That is one crazy *ss project!

Like mentioned before, alignment would be very critical here. I would discuss this thorougly with the person you are doing the work for and make sure that they think it will work before you start. You may also want to get some sort of signed document saying you are not liable for parts costs if things don't work out. Unfortuanetely in todays world one must always look out for himself.

If you do go for it, and things work out, make sure you post lots of pictures.

[Black Wolf]

Not INTENDING to be insulting to your associate, but HOW did he come up with that idea for an induction system.....Drinking Bong Water? or Huffing Paint Fumes?

Why?......Why?.......Why?.......

[Grigg]

I would say it can be done.. but best to plan to have it re machined after you are done welding, both the flat surfaces and the bores the rotors fit in. Then oversize rotors may be needed.

For Detroit Diesels a scored blower housing (eats to much dirt) is scraped and a new one is found, they don't often crack, if they do there is something else going on.

If he throws enough money at it, it could work, but I doubt it is as simple as he thinks. Not sure how he plans to attach the rotors either, but they need to be just right to, as clearance around the rotors and case is less than 0.010", nothing touches in a Detroit blower, just the shafts in the bearings or end housings.

I bet the long rotors flex to much in the middle and hit the case.
Detroit did make a 12V71, but it used two blowers, but just one crankcase. If it had been a good idea to use one long blower I bet they would have done it to start with.

Grigg

[Little]

You could do a side by side layout


or a weird looking one

[kelzweld]

Thanks for the feedback guys. Surprisingly, I don't think he uses mind altering substances except a bit of alcohol. I did not think of the flex of doubling the length of the rotors, but it's surely another possible problem. Set up side by side or in a V configuration, or one on top of the other are probably all workable options, but he does want to run three four barrels.

[Black Wolf]

Sorry for the sarcastic humour, I was focusing in on the supercharger sitting on top of the tunnel ram intake.

Some people appreciate pieces clumsily thrown together to make something unique and outstanding. I myself, appreciate aesthetically clean products that actually work, and can be driven.

I will respectfully bow out of this discussion as I'm not a fan of "Art", and you didn't ask for opinions on how it looked.