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Hot Rods Hemi blower drive question

Discussion in 'The Hokey Ass Message Board' started by junkyardgenius, Aug 17, 2015.

  1. junkyardgenius
    Joined: Dec 29, 2005
    Posts: 707

    junkyardgenius
    Member
    from Kernow

    Can anyone remember what length blower snout they used on their early Hemi? I,ve got a 354 block here with a Weiand blower intake, I usually bolt the bottom pulley on then use a straight edge to determine the length of the snout but my engine is not built up yet but I,d like to get the blower together.I have a 6 inch snout here which I can shorten.
     
  2. porknbeaner
    Joined: Sep 12, 2003
    Posts: 40,743

    porknbeaner
    Member

    Can't help ya but no doubt someone can.
     
  3. junkyardgenius
    Joined: Dec 29, 2005
    Posts: 707

    junkyardgenius
    Member
    from Kernow

    If not I,ll just build up the engine first then measure exactly what I need like I,ve done before.
     
  4. i use a hot heads intake with a 8-71 and i have the hh balancer. i can measure it tomorrow.
     
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  5. C69A
    Joined: Jun 6, 2008
    Posts: 70

    C69A
    Member

    image.jpg This is a 392 with a Weiand intake, currently setup with a 2" drive but have had a 3" on this snout, crank pulley was bolted directly on the hub.
    Let me know if you want any other measurements .
     
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  6. R35J1S
    Joined: Jul 20, 2012
    Posts: 141

    R35J1S
    Member
    from Missouri

    I would like to know something. How far is it from the block to the farthest part the sticks out front on your motor C69A? Maybe measure from the area next to the water pump.
    I need to mock up my motor in my frame and figure out how close it needs to be to the radiator. Thanks.

    Sent from my SM-N900P using Tapatalk
     
  7. Gene Boul
    Joined: Feb 9, 2006
    Posts: 808

    Gene Boul

    Lots of things impact the alignment. Best you mock it all up then do what's necessary. I've seen variations in the blower cases such that one sat in a different place relative to another same manufacturer. No big deal just mock it up and check with big straight edge.
     
  8. 4 3/4 inches. i do run a crank trigger so subtract 1/4 inch if you don't run one. i also run a three inch belt. remember a 6-71 and 8-71 are the same case. the 8-71 uses a 1 inch spacer between the case and front cover to accept the longer rotors. this needs to be factored in.
     
  9. saltflats
    Joined: Aug 14, 2007
    Posts: 8,935

    saltflats
    Member
    from Missouri

    Sorry guys but what you running this stuff in?
     
  10. C69A
    Joined: Jun 6, 2008
    Posts: 70

    C69A
    Member

    I ran a BB Chev water pump which was 7 1/4" out from the front of the block, had about 3/4" clearance on the radiator.
    image.jpg
     
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  11. C69A
    Joined: Jun 6, 2008
    Posts: 70

    C69A
    Member

    This was in a 32 Ford frame with model A body. Front x member was moved forward 2"
    Firewall was not cut.
     
  12. dreracecar
    Joined: Aug 27, 2009
    Posts: 2,632

    dreracecar
    Member
    from so-cal

    I have seen more 8/71's with the 1" added to the back side so as not to change the relationship of the pulley drives without added spacing
     
  13. junkyardgenius
    Joined: Dec 29, 2005
    Posts: 707

    junkyardgenius
    Member
    from Kernow

    want to say thanks for everyone's input on this,great info here,thanks very much.
     
  14. R35J1S
    Joined: Jul 20, 2012
    Posts: 141

    R35J1S
    Member
    from Missouri

    Yes thanks. I was at Pete and Jakes yesterday and took a measurement off of a hemi they had. Around 4 3/4 drive with 9" total stick out from flat surface on the block.

    Sent from my SM-N900P using Tapatalk
     
  15. Brand Apart
    Joined: Jan 22, 2011
    Posts: 514

    Brand Apart
    Member
    from Roswell GA

    I'm at the mock up stage as well, I'm running a fluid damper already have the blower pulleys but I need to run 2 single belts. (It's not a race car, I want AC in this one) I'm thinking I sandwich the regular belt pullies between the rear blower pulley and the fluid damper. But if I'm wrong please chime in this is my first Hemi build and first blower build so I'm learning on the go
     
  16. ratman
    Joined: Jun 15, 2006
    Posts: 418

    ratman
    Member

    I'm on the same learning curve and have just finished my blower drive following peoples advice here on the Hamb and at three major blower drive suppliers,
    It became fairly clear at the start who new what they were talking about, even though it seemed wrong to me at the time.
    I was told not to run a harmonic balancer and to use a hub. This method uses the blower belt to remove any harmonics from the engine. I purchased a hub and single vee bottom pulley from Alky Diggers and it fitted perfectly.
    They also have 2 vee available.
    The engine is a 354 with a Weiand Manifold and 671.
    I have yet to fit the timing cover but the picture will explain it all.
    If you still want to use a Harmonic balancer make sure it is rated/designed to be used with a blower otherwise bad things will happen.

    Peter

    044.JPG
     
  17. R35J1S
    Joined: Jul 20, 2012
    Posts: 141

    R35J1S
    Member
    from Missouri

    Did you buy your manifold from alky diggers also?

    Sent from my SM-N900P using Tapatalk
     
  18. ratman
    Joined: Jun 15, 2006
    Posts: 418

    ratman
    Member

    No I got it from Summit, I was way way cheaper to buy the polished version rather than trying to polish or get it polished myself.
    Peter
     
  19. Brand Apart
    Joined: Jan 22, 2011
    Posts: 514

    Brand Apart
    Member
    from Roswell GA

    I've got the Weiand and a 6-71 on a 354 as well. I'm not necessarily sure about the harmonic balancer as far as wanting to use it, but my machine shop/ engine builder included it with the parts we ordered so I assumed it was necessary, fluid damper has a great rep.

    I've heard great things about Alky diggers from guys in the Southeast Gassers, so I will talk to them. As far as timing cover and water pump etc. I already have the Hot Heads Chevy conversion
     

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