A buddy from here on the H.A.M.B. gave me a 6-71 blower, I believe it is straight off a marine diesel. The rotors spin freely. I know it is cheaper in the long run to just buy a blower ready to run on a gasoline engine, but in this economy, I probably won't have that kind of dough in years. But I do come across a spare hundred or two here and there, so maybe in a year or two I can piece it together. I also have a lathe and milling machine, plus other tools. Is there a definitive source of info that I can reference to do this, I.E., tell me every little bit and piece I need, what to machine, and how to put it together? I mean really comprehensive info.
Your going to need to at least double pin the front rotor shafts and cut the rear bearing seats down a tiny bit if your going to replace the rollers with ball bearings. Its been a while, but I wanna say they wont seat all the way if you don't. Also, I've never had a double gear core and I'm curious how they attach.
I have seen that one, but I'm looking for something VERY in-depth. I know I have seen a very good thread here on the H.A.M.B., but a search didn't pull it up.
i think you should put that blower back where it belongs, nothings more fun then a 6-71 http://www.youtube.com/watch?v=8XG_JfyPdvE
Thanks, that's the one! I forgot I had it subscribed, as well as the two others: http://www.jalopyjournal.com/forum/showthread.php?t=360645 http://www.jalopyjournal.com/forum/showthread.php?t=146890 Now to find V-belt info, gotta run an engine driven fan and generator as well...
Also, a cheap pair of balancer pullers work for pulling gears and make sure when you pull the rotors out of the rear plate, you don't try to pound them out by the center of the rotors. They are hollow and have pressed in plugs that are all but impossible to repair.
I would go to a company that does this for a living and get a quote. They will list all of the stuff they will do to convert it to gasoline. Some of the stuff you can probably do yourself on the pool table. I think speedway sells the belt drive conversion. They are cool. I always wanted a 6-71. The blower people will tell if it should be an over drive or under drive depending on the rpm of the engine and the cubic inches.
Pat Ganahl's book, "Street Supercharging", walked me through most of this on my 6-71 25 years ago. It shows Gene Mooneyham going through a 4-71 step by step, as well as tons of info on everything about street blower motors.The tricky parts are reclearancing and repinninig. Not easy for the novice, but doable.
I have a lathe, drill press, mill, etc., I'm sure between me and my buddies we can do it, with the proper info. I'll get the Ganahl book.
Deans blower service in Wa. used to have all the info online. I think he charges for the info now. He has all the needed info plus reasonable parts. Converting the blower is pretty straight forward and reasonable. Building or buying the drive components is where the money/time costs.
I just remembered someone had a thread where they made a blower manifold from a 4 BBL manifold, anyone remember that one? I found this one, I thought there was one for a Chevy or Hemi... http://www.jalopyjournal.com/forum/showthread.php?t=124409&highlight=blower+manifold&page=2
What you have there is an "E" blower. That has the reduction drive on the ge****t to slow down the blower. You should not use that. I think you can remove the extra ge****t and proceed. If you want to just do a basic rebuild, seals and bearings, when you pull the drive gears, keep the shims with each rotor as they came off, you can then re***emble with the shims in the same place and have the clearances the same as it was before you took it apart. I think a lot of the modern modifications to these blowers are overkill. That blower ran at 2.1 times the engine speed which could be as high as 2300, so that's 4800 rotor rpm. And made about 7 lbs boost. And would do it day after day, mile after mile running at full speed for a million miles.
Neet stuff, you are going to make me open my 671 i have had for years. it is new still in wax military box.
I was just wondering why all the pictures I see only had two gears back there. It was already taken apart when I got it yesterday.
I just picked up a 671 myself I got the CD from Deans blowers and it tells you step by step how to convert it over, tells you how to clearance it, pin it, etc. you can get a kit for about 60-80 bucks with all the seals pins etc. from Deans, also theres a couple of posts on hear on the hamb thats pretty informative. http://www.jalopyjournal.com/forum/showthread.php?t=367403 http://www.jalopyjournal.com/forum/showthread.php?t=360645 http://www.project33.com/category.cfm?Category=Engine Im gonna do as much as I can my self. You should be able to make your own carb top plate and idler bracket with your Mill and Idler pulley with your lathe, just get the bearings, so all youll need to buy is a blower snout, cogged pulleys a 1 or 2 v-belt pulley for your alternator/waterpump and a rear 671 end plate, and belt, also your carbs of course, they need to be manifold referenced, and you can convert a set of existing elcheapo 1850's or 3310's for nothing, here are some webs I found on how to do that. http://www.motorsportsvillage.com/modifycarb.html http://www.fordmuscleforums.com/ind...ce-your-power-valve-supercharged-engines.html
Hey Richard, I'm in a similar project. It turns out I have a 4-71. Good enough. I got that Ganahl book this weekend: Pretty good. Have you checked out these charts from the BDS site? http://www.blowerdriveservice.com/techcharts.php
I did this on my DeSoto. http://www.jalopyjournal.com/forum/showthread.php?t=505033&highlight=desoto+blower
Pretty cool, I wonder if I could do that with the stock two barrel Hemi intake? Would it flow worth a damn?
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