Hey guys, I have a Weiand 6-71 that was originally on a BBC that I had. I built a new SBC and bought a Weiand blower intake for the SBC but now my drive alignment is way off. Are there different versions of this intake? Are there different snout options for this version? Any help would be appreciated, I'm kind of stuck until I get this figured out. Thanks
Weiand built the snout into the front cover on these older blowers, which complicates things for you. Small block and big block Weiand blowers use different front cover/snout assemblies. You gotta get the right one...or choose a different blower that has a separate snout, and get the correct length snout, or get a different front cover that will take a separate snout. Or get a big block....which is usually the best answer.
Yup, small block uses a short snout drive, here is an old thread about it https://www.jalopyjournal.com/forum/threads/671-blower-snout-length-sbc.1038336/
Change the front cover and drive snout to the correct unit. Without having the unit in front of me, there is a possibility of machining the cover to shorten it along with the having the shaft re-splined, But then, cost of doing that might become a factor. I would think that for tooling cost, it easier for the manufacture to trim to fit and existing cover then to create 2 separate covers that fit the same housing, Aluminum is cheap to machine
That looks like a very long snout for a Chevrolet,,,,,,you did check behind the pulley and make certain it doesn’t have a spacer in there ? It looks like it needs to come back about 2 inches,,,or whatever those standoffs are on the idler bracket. I’m not certain,,,,but always check . Great looking setup,,,,,it should really haul ! Tommy
Just switch to a regular GMC front cover & use one of the common drive snouts. The snouts come in different lengths.
I just picked up a stock front cover for $10 bucks at a swap meet, then you can buy a tri-plate, seal and snout assembly from places like Good Vibrations which may have something in their pre owned parts section. https://www.goodvibesracing.com/Blower_Snouts.html My 6-71 sbc setup is 3.5 inches and my 8-71 front offset bbc setup is 6 inches, of course that all depends on what's hanging off the front of the crank (dampener, 2 groove pulley, hub or what have you)
You'll also have to cut down those idler bracket standoffs or buy shorter ones Holley has some items on sale currently in their supercharger section, but like always, comparative shopping is suggested. Speedmaster stuff is equivalent to pro-comp offshore garbage, I'd stay away from their products.
UPDATE: Upon further investigation, apparently they used the same snout on SBC and BBC versions. The BBC version just has a 2" aluminum spacer. Pulled that off and now just need some shorter bolts for upper pulley. Will need to make some small spacers for the idler assembly, but that's definitely doable. Much closer than I was this morning. Thanks to everyone for their info.
Learn something New each day, Like most that have replied , did not know that Weiand used the short drive with a spacer on snout , You pretty much saved on a $300 ish extra purchased ,
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