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phenolic spacers

Discussion in 'The Hokey Ass Message Board' started by jan bogert, Dec 5, 2011.

  1. jan bogert
    Joined: Jul 11, 2011
    Posts: 655

    jan bogert

    anyone useing these? are they any good or just another speedway joke? there only a 1/4" thick. my gas is boiling in the carbs seen it for myself. what do you think? any good or do you know something better.
  2. I'm running a 305 with an aluminum intake and a Carter carb. After shutting the engine off (anywhere ... parking lot, home garage, driveway) I would smell raw fuel. I never did pop the hood and actually check for the fuel boiling out of the carb but I did purchase an extra thick gasket (might have been called a heat insulating gasket) for the Carter (gasket was about 1/4" thick, similar to the thickness of a factory GM Quadrajet gasket) ... my problem was solved, no more raw fuel smells at all.

    As per your original question, I have no experience with phenolic spacers, but isolating the carb from engine heat (using a thicker gasket in my case) did the trick for me. I would guess that phenolic spacers work, just saying they might not be the only solution to your problem.
  3. I have run phenolic spacers as insulators or isolators depending on who you ask. They work real well.
  4. Have a set on my 6.1 hemi and it dropped the intake manifold temp by over 80 degrees. They do work and are definitely a big bang for your buck.

  5. Jack E/NJ
    Joined: Mar 5, 2011
    Posts: 736

    Jack E/NJ
    from NJ


    Jack E/NJ
  6. Jmountainjr
    Joined: Dec 29, 2006
    Posts: 1,502


    To answer your question - yes they work. But so does plywood. Plywood needs to be thicker. Many pro stock cars back in the 70's had wooden carb spacers.
  7. Joe Johnston
    Joined: Jun 29, 2008
    Posts: 127

    Joe Johnston
    from Ohio

    Ford used them on Y-Blocks in Thunderbirds. The people I know who removed them when they cracked or broke soon replaced them. Mine is about 1/2" thick with gaskets on both sides. Works for me.
  8. Mr48chev
    Joined: Dec 28, 2007
    Posts: 32,399


    Plenty of stock applications use a 1/4 or so thick phenolic spacer/gasket.
  9. I'm using the 1 1/4" aluminum risers I bought from Dashman here on the H.A.M.B.. I had a slight gas smell also and since I put these and three new carb bases from Charlie at Vintage Speed on I have had no problems. I put the new bases on first and ran it, it ran much smoother but still had the gas smell. I then bought the risers and put them on and no more gas smell, and it idles smooth in gear at 750 RPM. I guess getting the carb base away from the intake helps.

    Attached Files:

  10. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,856


    OK, so what is "phenolic" anyway? All I know is that it dates back to the bakelite days and it smells real good (in that forbidden chemical way) when you drill holes in it.

  11. jan bogert
    Joined: Jul 11, 2011
    Posts: 655

    jan bogert

    :)thanks guys. i'm going to my local woodworker and having him make a pair 3/4" thick out of oak.
  12. Jmountainjr
    Joined: Dec 29, 2006
    Posts: 1,502


    Oak will be OK - but 3/4" marine grade plywood will give you more insulation due to the layering and glue.
  13. It's a compound of resins,,HRP
  14. Blades
    Joined: May 25, 2006
    Posts: 1,188

    from Chicago

    Anybody got a lead on someone who can make phenolic spacers?
  15. I hope the smiley face means you're kidding. You are kidding, right?
  16. shinysideup
    Joined: Sep 1, 2008
    Posts: 1,627

    from ruskin, fl

    Phenolic is the resin.
  17. Dashman here on the H.A.M.B. P.M. him, great guy to work with.
  18. Vimtage Iron
    Joined: Feb 28, 2010
    Posts: 560

    Vimtage Iron

    You can buy these at Napa, the one I got was a little too thick for the application so I thinned it some on a fixed belt sander, took a bit of time but came out nice.
  19. Tri-Power
    Joined: Jun 23, 2008
    Posts: 153

    from Memphis

    Mike51Merc asked:, so what is "phenolic" anyway?

    Phenolic is a composite material. It is a resin impregnated wood or cloth laminate which is cured under pressure (and heat?) to make a very stable composite.
  20. I have seen spacers made of wood ... but (as someone else mentioned) the wood used was plywood. I would think there is a better chance of the spacer cracking if you use board stock rather than plywood.
  21. Go to Summit Racing,they have 100 different phenolic spacers listed,,something for everybody. HRP
  22. LAROKE
    Joined: Sep 5, 2007
    Posts: 2,055


    Works for me

  23. JeffB2
    Joined: Dec 18, 2006
    Posts: 9,330

    from Phoenix,AZ

    I've always run these comes with the longer studs too,the 1" rise usually adds a 5-7 HP increase.;)

    Attached Files:

  24. Jack E/NJ
    Joined: Mar 5, 2011
    Posts: 736

    Jack E/NJ
    from NJ

    borntoloze>>>a better chance of the spacer cracking if you use board stock rather than plywood.>>>

    Yeah. So choose you boardstock carefully whether hard or soft woods. I use carefully selected pineboard finished with a thick layer of varnish. Plywood is sometimes hard to work with due to layer splintering.

    Jack E/NJ<!-- / message -->
  25. bob35
    Joined: Aug 26, 2011
    Posts: 75

    from DFW, TX

    You can make your own really easy! That's what I did. I searched all over, and couldn't find one with the internal portion the way I wanted it... so I just made my own. You can buy phenolic pieces right from MSC ( with thicknesses from 1/32" to 2", and the stuff is real easy to cut with a Dremel, hack saw, hole saw, table saw, etc.

    There are different kinds of phenolic material, depending on the base material that the resin is mixed with - there's paper, linen and canvas. I think paper and linen are the most common in automotive applications (canvas is too coarse). If I remember right, I used linen because I read somewhere that it was the best.

  26. gasserjohn
    Joined: Nov 9, 2008
    Posts: 1,219


    dashman made these for me..............
    weiand tunnel.........
    check at his company site.....

    Attached Files:

    Last edited: Dec 5, 2011
  27. This guy seems to be doing a good job with insulators. Have talked to him several times. He works out of his house the last I knew. Think he was once in aerospace somewhere. States that he has had to quit his job to keep up withthe interest and orders. Call and talk to Dennis at Cool Carb 717 309 0719. He has a lot of tech info about temp differences that he can share with you. Might be the answer for many of us. FWIW.
  28. Burchwood is much better. It doesn't transfer heat like aluminum and doesn't distort like plastic or phenolic. I had one on my last mill and was good for 9 additional horse on the dyno. AED makes a 1/2" Burchwood spacer that sells for less than $40.00.
  29. I make carb spacers from Vermont birch (solid and plywood) for 97's, 94's, Holley 4 bbls and Roch 2 bbls. I have been doing this for over 25 years. My friend has had one on his drag car for two years and says his carb stays cool even in ambient 100 degree Florida weather.
  30. Craven Moorhead
    Joined: May 4, 2005
    Posts: 141

    Craven Moorhead
    from New Berlin

    I just went to a 1/2" phenolic 4 hole to gain some bottom end and insulate the carb from the intake, it worked well on both sides of things. Set up dependent they can be a good fine tuning device. Super Sucker appears to have one of the better overall performance designs.

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