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GM/Caddy small block question?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by K5RON, Jun 2, 2001.

  1. K5RON

    K5RON 1/2 ton status

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    A guy in a club I belong to says he has three fuel injected Caddy 350's, all from Sevilles. He wants to dump them on a quick sale. Does anyone know if Caddy and GM(Chevy) have the same bolt pattern? I believe Buick made a 350 but I think it has a different pattern.

    Is the fuel injection swapable(Is there a word?)?

    Thanks
    Ron
     
  2. johnnysjimmy

    johnnysjimmy Registered Member

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    i belive they are the buick versioon of the 350, and if they are you will need to buy an adapter plater from who else but Advance Adpaters, or buy a BOP (buick,olds,pontiac) trans.

    73' GMC Jimmy 8" lift and 35" tires.....14 boltff and big 10 bolt on the way
     
  3. newyorkin

    newyorkin 1 ton status

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    I've been askin a lot of questions about Caddy to Chevy compatibility, and what I discovered is that Caddy engines use Buick Olds Pontiac (BOP) bellhousing. I don't know about newer engines, the one I'm working with is a '76 500ci. If these motors are FI, they must be 80's at least.
    Take a look for my post about it, I got a ton of good replies, with lots of good links. The subject is "caddy 500ci in K5, gettin serious".
    Just curious; are they North Star's?

    Ratch
    **<A target="_blank" HREF=http://k5.8m.com>http://k5.8m.com</A> What more is there to life?**
     
  4. grumpy

    grumpy 1/2 ton status

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    You can also get a Chevy to BPO adapter plate at Jeg's for around $70.
     
  5. mpascino

    mpascino 1/2 ton status

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    these motors were used from 76-80. They are oldsmobile motors similar to the infamous olds rocket motor. As newyorkin said they use the BOP bellhousing patteren. From my aspect it would not be worth the trouble to swap in a motor like this, they only make 175 HP @4200 RPM and 275 FT/lb at 200 which can be easily produced be any chevy 350. Also keep in mind this setup is one of the first years of fuel injection and is by all means not perfected. There were a lot of problems and they are not effiecent. You'd be better off swapping in a TBI or TPI setup on your chevy motor. My 2 cents.

    You call that dirty!?
     
  6. mpascino

    mpascino 1/2 ton status

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    Newyorkin.... I just found out that in 75 and 76 the caddy 500 motor was avaible with Fuel injection! Only thing is these year motors only produced 210 HP with 380 ft/lb of torque. I would have expected more outta a motor like this but just thought I would let you know.

    You call that dirty!?
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    Buick, Olds Pontiac and Chevy all made their own 350's. All entirely different motors. However, BOP and Cadillac share the same bellhousing bolt pattern.

    FWIW, I believe the badging on the FI Caddies of this vintage was a "Fuel Injection" logo with 4-6-8, indicating the "ability" of the FI system to alternate cylinder firing for extra cruising economy. Way too early in car computer developement, and they were not very popular at all. If these ARE Olds motors, (oil fill neck at the front of the motor, just behind the water pump on the passenger side of the block) Some people might be interested in parts or complete motors if you decide against it.



    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  8. pcorssmit

    pcorssmit 1/2 ton status

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    I seem to remember the late '70s Sevilles running a port fuel injected Olds small block, using an analog FI setup.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  9. newyorkin

    newyorkin 1 ton status

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    MPascino, that sucks! Do you know how the carbed version did? I had heard 550 ft-lbs, but not specifically about the '76 500. I wonder If I should have this caddy wheel tested before I rip the motor out. If it's only pushing like 150-200 ft-lbs at the wheels, it may not be worth it...

    Ratch
    **<A target="_blank" HREF=http://k5.8m.com>http://k5.8m.com</A> What more is there to life?**
     
  10. Jeff427

    Jeff427 1/2 ton status

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    This info taken from the July 2000 Hot Rod Magazine;
    76' 500 straight from the junkyard (with new gaskets) dynoed @:
    303 hp @ 3900 rpm
    468 ft-lbs @ 3300 rpm
    In the testing that Hot Rod did they found that just adding headers and an Edelbrock intake easily put the hp up to 340 and the torque to 501ft-lbs.
    The factory grossly underrated them to keep the government happy.

    Jeff427
    <font color=red>Mud Dog Off Road Club</font color=red>
    http://lyonsdesign.bigstep.com
     
  11. dyeager535

    dyeager535 1 ton status Premium Member

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    Was that dyno test with no accessories or was that fully loaded, with all accessories running? (AC, water pump, etc) HP/Torque figures were based on those conditions in '76, unlike earler (71 and before I believe) figures that were with no accessories. If no accessories, take off 20% and you are close to what the factory SHOULD have rated them at.

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     

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