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New copy of Weiand 671 blower supercharger basics tech manual with illustrations:
$14.95
Its 16 pages total including the front and rear covers. Weiand quit offering this many years ago and I get calls every day with questions that have answers in this manual. I found this latest revised issue (7/98) at a swap meet and decided to get some copies professionally printed to sell and to use here in the shop. Just a couple of neat features in this tech manual are recommended carburetor(s) based on supercharger boost and engine size. Another is an effective compression ratio chart that helps you a bunch as well as the boost pressure estimate (pounds per square inch) based on cubic inch, over or under drive ratio percentages. All in very simple explanations and when you’re done with it, you’ll have a good knowledge of the belt driven Roots style blowers.
