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What exactly is a 383 stroker?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 88k5canyon, Sep 5, 2002.

  1. 88k5canyon

    88k5canyon Registered Member

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    I have been hearing alot lately about 383 strokers and all the power and torque they have. Anyone who has ANY info please tell me about it.
    Thanks Dave





    UNITED WE STAND, DIVIDED WE FALL
     
  2. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Its a small block Chevy with a 4.030" bore and 3.75" stroke.

    Basically a .030" over 350 block with a turned down 400 SBC crank and either 400 rods and 350 pistons or 350 rods and custom pistons.
     
  3. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    A 383 stroker is a 350 block which has been bored oversize .030" and uses a 3.750" stroke crank making the cubic inches 383. The stock stroke on a 350 is 3.480"
     
  4. 88k5canyon

    88k5canyon Registered Member

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    okay guys thanks, very informing, now who would do this work and how much would it cost (approx.)$ /forums/images/icons/grin.gif
    Thanks Dave
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Power costs money. It just all depends on how much power you want. It will probably make 300 bare minimum, but if you wanted to run a huge cam, good heads, and a forged crank and spin it over 6,000 RPM it could make over 500 HP. (and also cost a boatload of money)

    I'd say to do a 383 correctly it'd cost in the neighborhood of $3k.
     
  6. trailblazer87

    trailblazer87 1/2 ton status

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    You can buy a factory built 383 from Chevy for about $3300.
    I've thought about saving up the pennies so I could get one.
    325 hp and 425 lbs of torque. Not bad for a crate motor, and all of the power down low in the curve /forums/images/icons/cool.gif
    DO a search on one and one of the posts has a link to the chevy web site where it is advertised.
     
  7. 82Jimmy

    82Jimmy 1/2 ton status

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    i built one, and dropped it in a friends 72 chevelle and it got like 8mpg, and was fast as hell. they are neat, but the gas mileage is that of a 454
     
  8. ftn96

    ftn96 1/2 ton status

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    I have a follow up question. If I go with 400 rods, will I still have to have the cylinder wall machined or clearanced like I've heard you have to do to use the 5.7 rods?
    Cause I have a 40 over 350 now ready to build and dont really want to haul it back to the machine shop. But I'm still just gathering information at this stage. /forums/images/icons/smirk.gif
     
  9. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    Muddin4fun has one and can show her cool burn out video she made... /forums/images/icons/grin.gif
     
  10. Supergas

    Supergas 1/2 ton status

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    Do yourself a favor, buy a copy of "How to build Big Inch Chevy Small Blocks". It is volume 9 of the Hot Rod Magazine technical library. This really good book discusses all the combinations and displacements and what they will do or not do. A 383 w/ TBI injection is pretty straight forward and a bullet proof combination.. Use the Vortec heads and stay away from large valves and large CFM runners or you will move so far up the RPM range that you will defeat the purpose. Look at the specs on the GMPP HT 383 that you can buy for 3700.. check out www.paceparts.com or www.sdpc2000.com for GMPP engine prices.
     
  11. chevysrule

    chevysrule Registered Member

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    if the block is punched .060 over, and stroked that makes it a 388 correct? is there much difference in the torque curve of a 383 and a 388?
     
  12. BryanL

    BryanL Registered Member

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    One of this months Chevy magazines has an article on GM's 383 crate engine. Sounds like a deal. They actually machined the rods and kept 4" bores. Can't remember the mag but the article is featured on the cover so it isn't hard to miss.

    Bryan
     
  13. TopOff

    TopOff 1/2 ton status

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    Depending on what you want... I spent $2350 on mine.

    That included another set of stock heads. After 15k miles I cracked the heads, when I let one of the radiator hoses loose, and slowly lost water... /forums/images/icons/crazy.gif

    I am running ~440lb/ft and 310 hp. I get 15 MPG with my stick. I was getting ~13.5MPG with my auto.

    Basically, I have a "stock" 383. WOvlerine WG1372 cam. This cam is VERY close to an edelbrock Performer cam. The Perfromer has a little bigger lift, and the exhaust opens a little later than mine. With the Edelbrock cam you should get 325 HP and 430 lb/ft.

    I wish I had the Edelbrock Performer with my stick now. /forums/images/icons/smile.gif
     
  14. Derf00

    Derf00 1/2 ton status

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    Supergas,

    You just described my new 383 perfectly. We also added a Edlebrock MPFI which makes for a very strong combination with 4.56's & 37's. But best of all is that with just 2K mi on the engine, the MPG has jumped from 10 with the old 350 to 12. /forums/images/icons/grin.gif
     
  15. BryanL

    BryanL Registered Member

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    Correction....

    The GM crate 383 article is in the October 2002 issue of 4 Wheel Drive & Sport Utility. Motor still looks good.

    Bryan
     
  16. keith

    keith 1/2 ton status

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    I have a Stroker that is 60 over with Dart heads and the Commander 950 Fuel Injection. Comp cam and Crane Roller rockers. I still cant figure why I was breaking U-joints when I hit the gas to Spin those 38's. /forums/images/icons/shocked.gif
     
  17. wrathORC

    wrathORC 1/2 ton status

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    Well, like anything stroked, it makes more torque than horsepower of something with the same displacement and shorter stroke. Bascially, some smart guy about fifteen years ago machined a large journal (2.65") 400 crank and stuck it in a 350 block and used the same flywheel/flexplate/harmonic balancer as the 400 had. You get some more power and have better gas mileage than a 400. Plus, 350 parts are cheap.

    What I plan to do:
    Find me a 400. Steal the crank out of that and stick it in a 350. Take the crank out of the 350 and stick in the 400 with some special bearings you can buy now. Basically, you end up with two motors for two special purposes. The 383 will make a nice truck motor with all of its torque. The 373 (400 with 350's crank) will make a nice high-revving car motor. Think 327 kind of RPMs. Short stroke and large bore means rev happy little motor. Of course, if you can get some really long rods to go with that short stroke then it'll be even better. mmmm solid roller lifters here we come. haha.
     
  18. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Tim,

    The way I'd always heard that expression from engine builders is "Horsepower is cheap, STRENGTH costs money!"

    It's only expensive if you want it to last..... /forums/images/icons/grin.gif


    Probably some truth to that.
     
  19. Beast388

    Beast388 1/2 ton status

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    I built the 388 stroker in my Burb. It makes plenty of power. /forums/images/icons/grin.gif I wouldn't built a 350 again, the parts to go Stroker are so inexpensive. If you have any specific questions about the build up let me know.
     

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