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History Kending/Predator carbs

Discussion in 'The Hokey Ass Message Board' started by FishFry, Nov 24, 2022.

  1. FishFry
    Joined: Oct 27, 2022
    Posts: 152

    FishFry
    Member

    I found this quite interesting



     
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  2. IIRC, the big issue with these was the 'cam' they used to control the A/F ratio. The cam profile really needed to be tuned to the individual motor on a dyno to get the full potential, not something the average backyard guy could do. Each/any change required changing the shape of the cam which needed some rather precise machining to do. You could use up more than a few cam blanks during the process. They were also rather tall and didn't fit under the hoods of a lot of cars without a scoop.

    Ford attempted to use a similar 'carb' in the '80s on some production cars, they proved troublesome and quickly disappeared.
     
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  3. Yes, they've had a couple of moments of being the next big thing over the years, but ultimately were not. With a search you'll find a few HAMB threads about them.
     
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  4. TA DAD
    Joined: Mar 2, 2014
    Posts: 794

    TA DAD
    Member
    from NC

    We had a 440 in a abody Chrysler with nitrous and it a Predator and it worked great, instant throttle response. But as stated we had to put a hood scoop on it for clearance. But yeah they were a flop. Hard to beat a Holley.
     
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  5. gimpyshotrods
    Joined: May 20, 2009
    Posts: 21,371

    gimpyshotrods
    ALLIANCE MEMBER

    They sure did look cool on top of the blower on Bigfoot, though!
     
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  6. indyjps
    Joined: Feb 21, 2007
    Posts: 5,183

    indyjps
    Member

    I was always interested in Predators but never enough to get one.

    Knew a guy that ran a Predator on a built pontiac 400 in one of those "screaming chicken" cars. Everyone gave his crap for the year it took him to get it tuned - it eventually ran some quick times for what it was. He was always messing with it. Eventually switched to a 750 DP and ran better.

    Anyone running one now- have them figured out?
     
  7. lostone
    Joined: Oct 13, 2013
    Posts: 2,176

    lostone
    Member
    from kansas

    Had a buddy that ran one on a 500+ cubic inch big block ford and loved it. It was on an old rear engine dragster so it was full throttle all the time.

    Took him awhile to get it were he wanted but he got it done.

    He later put two in a street driven 62 starliner with 500+ cubes and he got it running good too. Ask him how he did it and he would just smile. Got alot of looks at car shows when he showed up with the car with a tunnel ram and dual predators sticking thru the hood. Ran great, sounded nasty and just plain good car to look at.

    He drove it on the street for 2 yrs then someone offered him some scary amount of money and the car headed north that same day.

    .
     
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  8. Dave G in Gansevoort
    Joined: Mar 28, 2019
    Posts: 1,617

    Dave G in Gansevoort
    Member
    from Upstate NY

    We ran 2 different Predators on a hill climb sprint car, one on gasoline, one on methanol. Still have the gasoline Predator, but the methanol one is long gone. Over time it was consumed by the alcohol! Even draining it and pickling with gasoline didn't prevent the corrosion.

    DSCN1697.JPG I'd include a picture of the carburetor, but it's in the shed in cold storage, and no lights. Anyone who needs instructions for a Predator let me know and I'll scan this.

    I found it easy to get them set up for the 400 cid engine we ran. The methanol one was not sensitive at all, but then again a/f ratio with methanol is not that fussy if fuel consumption is not a big concern. We ran Mt. Washington's hill climb a number of times, and the Predator was much better than a Holley as the elevation changed.

    The gasoline Predator was a little bit more challenging to get set up, but the company made us a cam based on our feedback. It seemed to be just fine, but now I have a carburetor that probably won't run on anything else without a new cam.

    Oh well... I'll get a picture of the thing tomorrow once I can see it in the shed.
     
  9. nrgwizard
    Joined: Aug 18, 2006
    Posts: 1,780

    nrgwizard
    Member
    from Minn. uSA

    I'd like to see good copies of the orig Kendig lit & specs. It was different than the later ones, & Predator too. Well, I'd kinda like an orig 1st gen Kendig carb, too.
    Marcus...
     
  10. Utahvette
    Joined: Sep 4, 2012
    Posts: 284

    Utahvette
    Member

    I tried one on my wifes well sorted bracket racer/street car. Initial impressions were that is was going to be faster. As stated by others, it had wicked throttle response and felt good. However , at the track it never went any better than the Holley750. Without a performance advantage , the driveability problems didn't justify keeping the thing on the car. Not as sophisticated as a Holley, if you can believe that. Had an original Kendig too. The Predator was far better engineered.The "Kindigarator" was really primitive.
     
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  11. Mike VV
    Joined: Sep 28, 2010
    Posts: 2,709

    Mike VV
    Member
    from SoCal

    I ran one on a big 409 for about a year...on the street !.
    Per what "Steve" said above...as I recall, they came with three or four different cams to experiment with ! I think it was three ground, and one "blank" so you cold experiment.
    Mine was an earlier...later version. Mine did not have an "idle" circuit to speak of. I didn't really understand, when the last version was released, it had a proper idle circuit. I never had any problem with mine, either during idle, or the transition between idle and power. Slow or fast throttle opening, didn't matter.

    Interesting fact, running my 1961, 420 inch, 409 Impala at Orange County Raceway, (yeah, that long ago !), changing between an 830 D.P. Holley and the Predator, the main difference, was with the Holley, the car would spin the tires on launch, the Predator would not spin the tires on the starting line. BUT the E.T. and MPH were very close. Sorry, don't recall the actual numbers at my old age, but I do recall, they were within a tenth and a half or so, and one or two miles an hour.

    The biggest deal with the Predator... Trying to drive at a steady state on the freeway was almost impossible. The gas pedal was SO...sensitive, that the heartbeat in my foot would speed-up or slow the car ! One afternoon, my then girlfriend even commented on...what was I doing with the gas ? I told her to step on the pedal and see what would happen ! She did. All of a sudden, we had picked up over 5 mph ! She said..."I didn't do anything!" I just smiled.

    Mike
     
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  12. 19Eddy30
    Joined: Mar 27, 2011
    Posts: 1,653

    19Eddy30
    Member
    from VA

    Ran Predator early 90s on mild 400 sbc with 144 , I do not recall any issues after sorting out witch cam to use, there was 3-4 cams , 1st gen Camaro ,L60 BFG 3:55 gear, high 90s mph 7:50s I actually stumbled upon the Predator again in my multiple location of parts few mouths ago & seen rebuild kits still available.
     
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  13. Ned Ludd
    Joined: May 15, 2009
    Posts: 4,612

    Ned Ludd
    Member

    Like the needle on an SU. Though stock SU needles should be OK-ish for a lot of applications.

    An idea I had was to take data from an O₂ sensor to design a needle profile and cut a needle, whereafter all the computerization becomes redundant.
     
  14. Dave G in Gansevoort
    Joined: Mar 28, 2019
    Posts: 1,617

    Dave G in Gansevoort
    Member
    from Upstate NY

    Dug the Predator out of storage this morning. A couple of pictures of the carburetor and the tuning manual. Forgot that was in the box... hey, I'm not a spring chicken anymore!
    DSCN1708.JPG DSCN1707.JPG DSCN1700.JPG
    Went online to see if the company still exists. Not sure, the latest update was in 2021. Oh well, it still looks good. Haven't used it since the 1990s, so anyone's guess if it will pass gas. Kinda large for the 327 that's going in the Whatever project.
     

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