2BBL in an F Engine

Discussion in '40- & 55-Series Tech' started by scoobiedubes, Jan 8, 2019.

  1. scoobiedubes

    scoobiedubes SILVER Star

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    I've got a 66 FJ45LV with the original F engine and I'm just looking for some performance upgrades without going too crazy. This is my second 40 series with an F engine, have had 3 others with the 2F and it's hard not to keep wishing the F could run like the 2F.

    I'm doing the pertronix upgrades as I've done in the past because they're simple and provide a good bang for the buck, but at the end of the day I think the carb is the biggest thing. I've looked all over here as well as the FJ vendor sites, and pretty sure there's no simple bolt-on way to install a 2BBL carb onto an F, but thought I'd post and see if anybody has any ideas.

    I did see this posted on eBay by the way, but had not ever heard of Toyota putting a 2BBL on a mid-60s F before. Is this legit?
     
  2. 65swb45

    65swb45 Elder Statesman Supporting Vendor

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    Yes, that’s factory. MAF also offered an aluminum plenum to put a 2bbl on top of the 1bbl intake.

    Trouble is, you’re still dealing with the limitations of siamesed ports.

    I know of two instances where an F145 head was put on an F135 block. Its kind of an extreme option, but it got both those guys out of a bind.

    FWIW, my D40 1bbl will flow enough air to go 80+. Acceleration...well that’s another story. :doh:
     
    Last edited: Jan 8, 2019
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  3. scoobiedubes

    scoobiedubes SILVER Star

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    So there were 2BBL carburetors on some mid-60s FJs? I never knew that, was that a factory option or something? That particular listing seems pretty pricey, just the first time I've seen the part.

    Good point. Maybe it's not worth it, but I'm curious if anybody has used the MAF adapters and how that's affected performance on an F?
     
  4. middlecalf

    middlecalf SILVER Star

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    Do two 1BBL carbs count? (Offenhauser)
     
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  5. 65swb45

    65swb45 Elder Statesman Supporting Vendor

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    IIRC, that was one of Harold Graves first sand castings (founder of ManAFre). Kay Specter would know the answer to that.
     
  6. scoobiedubes

    scoobiedubes SILVER Star

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    I was looking into this this morning and seems like unobtainium now, but interesting information sounds like it did actually work pretty well. I'm mulling over the MAF adapter + weber option right now, a little scared to take the plunge if nobody else has tried it but I guess someone has to be the guinea pig right?
     
  7. scoobiedubes

    scoobiedubes SILVER Star

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    Found someone locally that’s done a few restorations on FJs and tried the MAF route before, he said he didn’t feel like the added power was very noticeable. So I think I’m going to shelve this idea, but wanted to kind of complete the thread for any future searches. Imagine someone else someday will be looking for a way to do this again...
     
  8. middlecalf

    middlecalf SILVER Star

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    thebigredrocker and JohnnyC like this.
  9. scoobiedubes

    scoobiedubes SILVER Star

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    Thought it required that early MAF adapter that they discontinued a long time ago?
     
  10. JohnnyC

    JohnnyC Long ago TLCA# 2231 SILVER Star

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    is this your engine? would love to see detailed pics of the linkage setup when back inside your rig... do you have a build thread?

    seen plenty of the dual carb setups pics ... but... never any good detail
     
  11. middlecalf

    middlecalf SILVER Star

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    Last edited: Jan 9, 2019 at 6:16 PM
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  12. middlecalf

    middlecalf SILVER Star

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    Mine has Carter carbs. Not sure what the MAF adapter is.
     
  13. thebigredrocker

    thebigredrocker SILVER Star

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    Guessing the 2bbl into 1bbl MAF adapter 65swb45 mentioned was similar to the pics below. BA106748-25E0-4AF0-830D-64DD90C1AC76.jpeg 51497BE7-C979-487F-AB5B-2465B322E6F9.jpeg
     
  14. S4Cruiser

    S4Cruiser SILVER Star

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    There was one FS in the classifieds just last week!

    For Sale - CO: Offenhauser 2 carb intake and factory Exhaust Manifold for F motor
     
  15. scoobiedubes

    scoobiedubes SILVER Star

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    Oh man! I PM’d him just now but might be too late. I would definitely give that a try if I can get my hands on it.
     
  16. scoobiedubes

    scoobiedubes SILVER Star

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    This is interesting, anybody tried this setup? I am going to try to rebuild my carb and see if I’m happy enough with the results (supposedly recently rebuilt but truck is new to me), but if not I might have to give this a try.
     
  17. scoobiedubes

    scoobiedubes SILVER Star

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    I went ahead and bought this, figured if I don’t use it I’ll just sell it. Having trouble finding any threads from anybody that’s installed one though. Several threads about the 4BBL ones for the 2F but none for this two-1BBL. @middlecalf i guess I will be anxiously watching your thread to see how you like it!
     
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  18. middlecalf

    middlecalf SILVER Star

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    I’ll see if I can find the video JP @ClemsonCruiser has on a running offy setup.
     
  19. Downey

    Downey

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    OR you could buy the 2 barrel to 1 barrel adapter (shown above, many on ebay), then get one of my FiTech/Sniper installation kits and have fuel injection on the 135.
     
  20. scoobiedubes

    scoobiedubes SILVER Star

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    Have a link to that setup so I can read up on it? I did actually just order one of those 2 barrel to 1 barrel adapters from Cruisercorps this morning. So here's my order of options I'm going to try.
    1. rebuilt single barrel carb - should have this finished next week and see if it's significant enough. I'll probably drive with this for a few months before I try anything else.
    2. Redline adapter to put in a 2 barrel Weber. Maybe with EFI?
    3. Offenhauser 2x 1BBL setup
    4. Put in a 2F.
    And I've already accepted the fact I'm going to waste some money in this process but hopefully I can help someone else down the road looking to do something similar. I don't expect #1 will be something I'm happy enough with but I need a baseline if nothing else. And if I go to #3, i've got a recently rebuilt carb I'd need anyway so no loss there. If I don't ever do #3 I can sell those parts I imagine. #2 seems simplest but have only spoken to one person that's done it and he said he didn't notice a major difference but it's worth a shot I think.

    #4 I really would hate to take the original engine out of my LV, but if I can find a space for it I guess I can always crate it and include it with the sale if I ever decide to sell the truck. I have had 2 other trucks with the 2F AND the H55F and those trucks drove amazingly well, but there's obviously a high cost associated with going that route.

    I will keep this thread updated as I try out each of these options, this is probably going to take a few years of course.
     
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