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Is it possible or practical to hook a Jake brake up on a K5?>

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Silver84k5, Jun 16, 2002.

  1. Silver84k5

    Silver84k5 1/2 ton status

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    think it would kinda sound tight, is it possible? or would it be harful or what? anyone know? thx
     
  2. buick528

    buick528 Registered Member

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    if its diesel
     
  3. Silver84k5

    Silver84k5 1/2 ton status

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    not possible to do it on a gas motor?
     
  4. Jed

    Jed Registered Member

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    Doesn't a Jake brake require a special head/valve train on a diesel that pops the valves open at full compression? (so most of the energy isn't returned upon expansion).

    Perhaps you're thinking of a exhaust brake. Never heard of one of those installed on gasoline engine tho.
     
  5. Silver84k5

    Silver84k5 1/2 ton status

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    basically the answer is no hehe, damn that sucks it would be cool as hell
     
  6. XHitman396

    XHitman396 1/2 ton status

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    what are jake brakes, i saw a sign on the highway that said "no jake brakes" or something similar, and never even heard of it. thx

    Brett
     
  7. 70~K5

    70~K5 1/2 ton status

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    "Jacob's Engine Brakes" are a compression brake designed by Jacob for large diesel engines. The smallest engine I know of them fitting is a 11 liter detroit. It has turned into a generic term for that type of engine brake. It works on the same principle as a compression brake on a two stroke motor in a dirt bike.
     
  8. 4GUNZ4X4Z

    4GUNZ4X4Z 1/2 ton status

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    They are making engine brakes for smaller diesels now. You can get a setup for about $400 for your Ford/Dodge/Chevy deisel powerd ride. Something that just came out this year. As far as gas is concerned fat chance.
     
  9. 70~K5

    70~K5 1/2 ton status

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    I've seen the ads for those ones that put a flapper valve in the exhaust. Those are just an update on the "blue ox" engine brakes, and they didn't work that well. The "jake" in my pete has 600 hp of braking torque at 2100 rpm. No valve that shuts off part or all the exhaust pipe is going to have that much braking power. /forums/images/icons/wink.gif
     
  10. 4GUNZ4X4Z

    4GUNZ4X4Z 1/2 ton status

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    600hp uh-oh another crazy ass truck driver. Cluck cluck.
     
  11. 70~K5

    70~K5 1/2 ton status

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    That's braking hp from the jakes. I've only got a 425 hp cat though it does have 1450 ft lbs of torgue from the same motor. that's from a 14 liter 3406B Kitty Cat motor. /forums/images/icons/cool.gif
     
  12. 4GUNZ4X4Z

    4GUNZ4X4Z 1/2 ton status

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    Ahhh I remember the mechanical days.... 2 bad everything is computerized these days. I.ve got 2 of the 3406c's 475 turned up to 550. I wanted the 600's but at the time I would of had to wait 6 months. So I got what I got and must say I like em, 2 bad I'm stuck in the 1st trk century class 500 det. /forums/images/icons/frown.gif
     
  13. 70~K5

    70~K5 1/2 ton status

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    Yep with a 2100 rpm motor, 2100 in 7th is 38 mph. The perfect gear and speed for a 7% grade. Don't have touch the brakes much if at all. Save the brake for when some cage jumps in front of me. /forums/images/icons/laugh.gif
     
  14. trailblazer87

    trailblazer87 1/2 ton status

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    For the lay man, a "jake brake" on a gas motor would pretty much blow the head off the block, a gas motor is not design for that much compression. A diesel motor, because it uses only compression to ignite the air/ fuel charge, is designed for much higher compression ratios. If you want to go diesel, the best "old" style chevy diesel motor was the 1983 J series detroit diesel. Watch out for the old 350 conversions, they were junk as diesel motors, but great to convert back to gas.
     
  15. 70~K5

    70~K5 1/2 ton status

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    There was a guy running around here about 15 years ago had a mid 70s 1 ton 2wd long bed that had stuffed a 3208 cat in it with an allison trans too. That baby could pull a trailer. /forums/images/icons/cool.gif
     
  16. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    How? Isn't that one of those 6' long inlines that are about 4' tall?
     
  17. 70~K5

    70~K5 1/2 ton status

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    No the 3208 was used in medium duty trucks. Bigger than a BBC but could be "stuffed" in the engine compartment.
     
  18. Pugsley

    Pugsley 1/2 ton status

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    3208's were really common in the old medium duty COE Fords - didn't take up much additional room over the standard 332's either.
     
  19. 70~K5

    70~K5 1/2 ton status

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    Yeah I have this idea of a 1 ton frame and cab. 3208, allison 6 speed, 2.5 ton TC, and axles with rear steer too. Mech injected would run under water as long as the intake and exhaust were plumbed high. /forums/images/icons/laugh.gif
     
  20. Goober

    Goober 1/2 ton status

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    </font><blockquote><font class="small">In reply to:</font><hr />
    Yeah I have this idea of a 1 ton frame and cab. 3208, allison 6 speed, 2.5 ton TC, and axles with rear steer too. Mech injected would run under water as long as the intake and exhaust were plumbed high.


    [/ QUOTE ]

    Please post the pictures when you get it done! /forums/images/icons/wink.gif

    Can I take it for a swim?
     

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