Clifford long tube header.

Chris Smith
Chris Smith Expert Adviser
edited May 2014 in HUDSON
Looking for a picture or a comment on where the outside pipe from the collector crosses back under the frame rail on Clifford long tube headers to meet up with the inside and head towards the rear of the car. Im going soon to a muffler shop and would like some guidance. I'm going to run 2" siamesed pipes out the stock location.  

Comments

  • RL Chilton
    RL Chilton Administrator, Member
    Chris-

    It's easiest to do the crossover right in front of the gas tank.  That way you can duals out the back that are "split" on each side of the car.  
  • TwinH
    TwinH Senior Contributor
    Mine crosses over the frame stub then parallels to the back.image

    image
  • Chris Smith
    Chris Smith Expert Adviser
    Looks good TwinH  thanks for the pictures. Are you running glass packs? How long are they? Pipe diameter? These pictures will be a great way to show the muffler shop what I want.  I didn't think there was enough room between the frame and floor pan without having a rattle but it looks a lot cleaner than going under the frame.  
  • RL Chilton
    RL Chilton Administrator, Member
    Sorry 'bout that.  Think I misunderstood the question. 
  • TwinH
    TwinH Senior Contributor
    Buddy of mine did these in 2.25" pipe which is overkill IMO. Had to squeeze them to get past the carrier bearing where I think 2" would work and is plenty. Glass packs were 16 or 18" with room for maybe a bit longer. No problem here with rattles but system is pretty solidly mounted with newer style rubber biscuits on the chassis and round bar to the pipes.

    image



    image

  • Chris Smith
    Chris Smith Expert Adviser

    Thank you very much, I should be able to get a quote without towing my car with these pictures

    Chris

  • RL Chilton
    RL Chilton Administrator, Member
    I can verify, 2-1/4" would be VERY difficult.  We had a tough time with the 2" pipes we use, which I thought was overkill, as well. 
  • Lee ODell
    Lee ODell Senior Contributor
    If the pipes diameter needs to be squeezed to pass by the carrier bearing it is two big. You might as well go to a size that will fit without squeezing. A 2 1/4" pipe squeezed to 1 1/2", 1 7/8" or 2" is only as effective as the size of the squeezed pipe no matter how long the 2 1/4" pipe may be.

    The same effect is achieve when tubing binders squeeze the inside curve of pipe. Its flow (or restriction) is only as good as the size of the bend allows.

    Lee O'Dell
  • BillUSN1
    BillUSN1 Member
    edited May 2014
    Speaking of the hole by the carrier bearing, Did you need to elongate the hole?

    I looked at my 49 and it did not look that wide to fit 2 pipes side by side of any size.

    Figured I would need to open up a little wider to make any 2 pipe sizes fit in parallel.
  • TwinH
    TwinH Senior Contributor
    Bill,the pics are a 49 chassis and the opening has not been enlarged. Yes,in all reality 2" is probably overkill too for anything short of full competition and yes,I was a little shocked that he chose to use 2.25" but for the good buddy price and excellent work I'm happy for now. Having spent some years in the late 70's bending custom exhaust systems I can say that this IS a tough job in a stepdown chassis. The one that comes to mind for me was a 67 Shelby GT500KR Mustang I did way back then. It got 2" duals on that 428, 8 barrel motor because thats what was stock. Reality there was the stock manifolds already had it choked down pretty well. My thinking is 1.75" should be fine for a stock 308 with a header.
  • Ol racer
    Ol racer Senior Contributor

    FYI

     

    Suprisingly, those long tube Clofford Headers fit my Hornet powered Terraplane perfectly with ons collector inside the frame and the other outside the frame rail..... Of course had no problem with tail pipes clearance...

  • Lee ODell
    Lee ODell Senior Contributor
    The carrier rubber bushings probably get cooked well done with out some kind of heat shield added between pipe and rubber.

    Lee O'Dell
  • TwinH
    TwinH Senior Contributor
    Amazing as it may seem I've never had an issue with the carrier bearing mounts. I've put approx.6K miles since the exhaust and before I hurt the motor. Same mounts are going back in when I get done.
  • Lee ODell
    Lee ODell Senior Contributor
    TwinH

    That sound like some good news. On my El Camino with headers I cooked a few starters until I ridged up a asbestos heat shield. Perhaps there is a lot more air circulating around the carrier bearing mounts and or the pipe is a little cooler by the time it reaches the bushing.

    Thanks for sharing your experience. Not as dire a problem as I thought, however I believe a heat shield would help extend the life of a rubber mount.

    Your buddy did an amazing beautiful job with the pipes considering their size and space to work in.

    Lee O'Dell
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