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Technical Best/Worst 4 barrel manifold to adapt a small blower SBC

Discussion in 'The Hokey Ass Message Board' started by bfalfa55, Feb 25, 2015.

  1. moparmuscle1
    Joined: Nov 15, 2012
    Posts: 85

    moparmuscle1
    Member

  2. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 6,218

    56sedandelivery
    ALLIANCE MEMBER

    There is a SBC blower manifold, on that there auction site we still know of and love, that already has a plate bolted to it. Thing is, it was a blower intake to start with (?). I believe it's a Holley intake, possibly one of their intakes for their 144 mini-blower. So, what's going on? Are you still working with the N/A 265? I know you talked about a blower at some point. I'm surprised no one has asked for pics yet. I am Butch/56sedandelivery.
     
  3. bfalfa55
    Joined: Jul 23, 2013
    Posts: 223

    bfalfa55
    Member

    Yeah Butch, I am still going to build it normally aspirated to have fun with my 265 but I want to make it modernly blown and modernly fuel injected to see what I can actually get from the little beast !. New job is super busy but a lot more money. Have a city sewer to connect to and we are upgrading our daily driving cars, then I will get back to the 55 soon. I found an Edlebrock C26 for cheap that is a little beat up and I got the M112 for $221 ! Need to get the dimensions right and make an adapter plate. It will be a while before I finish the blown/fuel injected setup but I had to take a mocked up pic !
     

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  4. Toolroomer
    Joined: Oct 22, 2010
    Posts: 36

    Toolroomer
    Member

    another manifold that I think would work is the Offenhauser 360. They are one giant hole with a four barrel hole on the top and seem to be pretty affordable.
     
  5. Come to think of it I have an offy low 2x4 that is open from one end to the other. Toney You hit the right access code to my internal memory. :D

    This a damned lame idea as in cartoony lame but a tunnel ram would make a good blower manifold. LOL :rolleyes:

    Sorry I just couldn't resist the tunnel ram idea. :oops:
     
  6. bfalfa55
    Joined: Jul 23, 2013
    Posts: 223

    bfalfa55
    Member

    This a damned lame idea as in cartoony lame but a tunnel ram would make a good blower manifold. LOL :rolleyes:

    Sorry I just couldn't resist the tunnel ram idea.

    Hey Porknbeaner, put in "blown 283 Chevy" on youtube. There is a video of one with dual fours on top of the blower and it is a skyscraper over the top of the engine. It sounds LETHAL though. I go look it up every now and then just because it sounds so damn good !
     
  7. bfalfa55
    Joined: Jul 23, 2013
    Posts: 223

    bfalfa55
    Member

    It has been a long time since this thread was started! I took Porknbeaner's suggestion and found a Crossfire Injection Manifold for $50. Anyone who knows about them knows the runners are smaller and choked off where they go into the heads. I have reviewed many Crossfire related sites on ways to modify the manifold. Should I leave the cross runners and port/clean them up ? Should I hack out the whole inside of the manifold for one large plenum or being that this is going on a 265 with a blower should I just leave them alone? I will build this one day, I promise! I will post a new pic later. Waiting to hear what everyone thinks/suggestions.
     
  8. brigrat
    Joined: Nov 9, 2007
    Posts: 5,157

    brigrat
    Member
    from Wa.St.

    With a blower on a 265 you won't gain much hogging it out, spend your time on other things.................
     
  9. bfalfa55
    Joined: Jul 23, 2013
    Posts: 223

    bfalfa55
    Member

    Thanks Brigrat, that is the type of helpful words I need. This is going to be a high compression/low boost application. I see some areas that I can improve in this manifold plus the ways I have seen guys modify crossfires for the Vette's/Camaro's/Firebird's. That is probably the route I will go. Just good to get input for my crazy ideas!
     
  10. earlymopar
    Joined: Feb 26, 2007
    Posts: 1,171

    earlymopar
    Member

    Can't agree more with Porkbeaner. As well, one other "detail" to consider is that some of the aftermarket manifold manufacturers angled the ENTIRE manifold at 3 to 5 degrees rather than just the carburetor mounting surfaces. This creates a boat-load of additional work (and problems) when modifying for a supercharger base. I have a Weiand for a Mopar application where this was done. Ironically, this also made the original manifold much more difficult to design and to create a casting "die" for versus simply fly-cutting the carburetor surface to 3 degrees after casting. - EM
     

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