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383 Stroker long/short block or Kit

Discussion in 'GM Powertrain' started by kburb, Nov 30, 2011.

  1. kburb

    kburb Rockstar ROTM Winner 100 Posts

    Wanna start building a 383 stroker over the winter and not sure which way to go, i like the idea of DIY and keeping all the mechanical work to myself but just a little unsure of which route to take. Go the easy route and get a built long or short block or purchase a rotating assembly and saving a little cash.

    I am wanting to get 450 to 470 HP and at 470 to 500 TQ. I have the parts list together to achieve those type of numbers and the ability to do the work. I am asking for those that have built or bought for their story.


    thanks in advance,
  2. Crawdaddy

    Crawdaddy Epic Member Staff Member 5+ Years 1000 Posts Platinum Contributor

    Care to share your parts list with us? I've been wanting to build a 383 stroker myself, but I have no idea what I'm doing when picking parts.

    EDIT: And this was post 2500 for me....
  3. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Have you ever built a motor before??
  4. kburb

    kburb Rockstar ROTM Winner 100 Posts

    Yea and i also have a couple of buddies that own a small speed shop that can help.
  5. phoebeisis

    phoebeisis Epic Member 5+ Years 1000 Posts

    Thinking out lou here
    The GM PERFORMANCE 383E and non E make 340 HP-at 5000 RPMS
    To make 450 hp you'll have to spin to 6600 RPMS-so actually have to hold together at 7000 RPMS with that long stroke.
    Forged crank rods pistons etc
    Will stock heads flow that much or you going with aftermarket heads??

    The 383E is $4700 delivered to your curb-a real bargain for a motor with a warranty.
    You didn't say if your motor is FI or has to be pollution compliant??

    In any case I would buy a built crate motor from one of the well know buiilders-it will be a bit less than the GM-and many of them nake the 450 hp claim.
    Usually when I've done something like this-more often with motorcycles- but with cars also- I never seem to SAVE ANY $$ DOING IT MYSELF.
    On paper I always calculate that I'm going to save maybe 35% of the cost by DIY, but after it is done I always end up spending AS MUCH OR MORE.
    Now you apparently are very experienced-and have buddies that are very experienced,so it might work out better for you.
    Some of my extra cost is learning curve mistakes
    Still I would buy it built.
    GM makes some carbed SBC that make the big power you are looking for-they might not be strokers-might be 350's that just make the power at higher rps.
    The Nascar 350's make 700 hp but they do it at 9000 rpms with 14/1 compression and zillion dollar heads
    In any case it sounds like fun,
    Charlie
  6. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    I would also say buy a crate motor from GM because of the warranty you get with them. Also its hard to find a good reliable machine shop.
  7. phoebeisis

    phoebeisis Epic Member 5+ Years 1000 Posts

    Oh I see you have a modified TB.
    Will you use that?

    Nice looking Suburban- you got some serious $$ in it already-guess it deserves the stroker!

    Is that a 1500 or 2500??
    SINCE i'M SPENDING YOUR $$ SO FREELY- and FE is unimportant,and you will need the beefier tran from the 3/4 ton-why not get a bigger bore and stroke- 454?

    Granted it might be 150 lbs heavier?? But with 40" tires you can't be too concerned with weight?
    Probably better just to get a crate 383 , but I like to spend other folk's $$
    Last edited: Nov 30, 2011
  8. TRPLXL2

    TRPLXL2 Epic Member 5+ Years 1000 Posts Platinum Contributor

    I have never built a motor but I can tell you a little about the GM "warranty" on there motors.. My father bought a zz383 crate about 10 years ago, before he bought it he found out a few interesting things that you might want to check into first. There warranty is only for the motor as shipped, IF you want a different cam or different heads you must buy from the GMPP catalog and they must install them in the engine before delivery otherwise they do not cover anything on the motor. They will do anything you want to that motor, but you will pay big time. He paid $2,200 for an aluminum set of high flow heads, and $1,200 for the cam and upgraded springs and such. All in all he had about $15,000 in it total, but it had a 3 year 36,000 mile warranty on everything.

    The sad part is he fell ill shortly after recieving the engine, and it sits idle in his garage never fired and slowly becoming a piece of history.....
  9. kburb

    kburb Rockstar ROTM Winner 100 Posts


    No planning on putting a Holley FI system but that depends on if my money is catches up with my dreams. The good thing about a stroker is that im getting big block power with small block mpg. Also the 700r is willing to handle the HP but i am also building a stage two 2wd 700r4 now to use with my divorced 205.

    i see phoebeisis that you have 199k on your 98, my current tbi has 250k and still moving very well, can't beat that sbc!!
  10. phoebeisis

    phoebeisis Epic Member 5+ Years 1000 Posts

    217,600 miles now- still runs great!The last 23000 miles are mine-
    Used Suburbans are real bargains-cost just $2900 with 195,000 miles 4.5 years ago-
    Speaking of gas mileage-it averages 21 mpg over 3000 mile hy trips from New Orleans to Flagstaff AZ-that was a big surprise-expected 16mpg or so-not 21mpg.Gets 13mpg in the city.I drive about 65 mph hy, but lotta towns cities road work-so probably averaging 60 mph to get 21 mpg
    Yes the 454 will just swill gas! The SBC can get great mpg.
    Charlie

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