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more torque needed

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BLZN4FN, Mar 27, 2001.

  1. BLZN4FN

    BLZN4FN 1/2 ton status

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    ok I just got my new boat and now the K5 is a real pig.
    It is a 1990 K5 350 auto 4in lift 4;56 gears w/rear locker high flow exhaust
    K&N air filter. Now I need more power and torque I live in Colorado so high altitude
    any one have any ideas how to get more power and torque ? I may have to sell and get a
    Ford with a power stroke Any help would greatly apreciated.

    Thanks
    Bo
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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    Aftermarket intake, Headers, Ignition system, cam and matching valve train kit. Drop in a BBC or stroke your 350 to 383. It all boils down to how much money do you want to spend???

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  3. CaptCrunch

    CaptCrunch 1/2 ton status

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    Well us racers have an ole motto... "Speed costs, so how fast do you want to go today?" This kinda the same deal... power costs. Seems doing some upgrades to the blazer would be cheaper. Depending one how much power you want, there are a number of options... 383 makes great power and can reuse all the same brackets and accesories you have... otherwise you could run a mild to moderate big block depending on how much milage you want. Heck the 454 TBI in our shop's tow truck get better milage then my Blazer w/ a 350 TBI and has a ton more power. Also one of the fellas has a 98 2500 Chevy w/ the Vortech 454... woooo hooo!!! [​IMG]

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     
  4. BLZN4FN

    BLZN4FN 1/2 ton status

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    If I went to a 383 setup what kind of hp and torque do the make
    on an average ?. I know Gm sells one set up for fuel injection w/chips
    anyone installed one from GM ?.
     
  5. Burt4x4

    Burt4x4 3/4 ton status

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    Torque on a 383 can range from 350 to 450. The build I want will produce about 420 torque.

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  6. HarryH3

    HarryH3 1 ton status Author

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    Just remember that those numbers are at sea level. Subtract about 25% from that at 6,000 feet above sea level. And you're down about 45% or so by the time you're pulling up through the Eisenhower tunnel on I-70. There just ain't no air up there! [​IMG] [​IMG] A ride in a buddy's Turbo Powerstroke 7.3 over Hoosier Pass showed me the value of having forced induction! [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
     
  7. muddin4fun

    muddin4fun 3/4 ton status

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    If you get headers, get the smaller tubing. They make more torque than the larger tubing headers

    [​IMG]


    <A target="_blank" HREF=http://muddin4fun.coloradok5.com>http://muddin4fun.coloradok5.com</A>
     
  8. Pookster

    Pookster 1/2 ton status

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    Vortech Supercharger. About 2.5 k, will add about 100 more lbs of torque.
     
  9. BLZN4FN

    BLZN4FN 1/2 ton status

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    Does anyone have any power pack system on there K5's
    like banks kit or ederbrok power kit or any thing along the same lines ?
     
  10. ftn96

    ftn96 1/2 ton status

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    I've heard a few replies out there about the Performer Package from Edelbrock. I think from what I've read, those packages, even in pieces alone, not all together I mean, all produce signifigant increases in power. You may just need to install a different cam and maybe a higher stall torque converter along with a better intake manifold. as long as you have a good flowing exhaust. I would think that that would at least get you in the right direction. and most of this would be less than 750 bones, depending on how much labor you can do.

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  11. dyeager535

    dyeager535 1 ton status Premium Member

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    Drive it like a manual. Shift gears just like you would if it was a stick. Holding that thing in each gear longer you will notice a LOT better towing performance.

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     
  12. pcorssmit

    pcorssmit 1/2 ton status

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    If you're looking for a modest increase with the stock motor, I'd start with a decent exhaust and a cam.

    Higher stall torque converters are NOT a good idea for towing. They lead to much higher heat, with will destroy the transmission.

    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
     
  13. jarheadk5

    jarheadk5 1/2 ton status

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    You could give one of the good cam companies a call. (Crane, Competition Cams, etc.) They'll be able to help you out with a cam that is ground for torque and spec'd for your motor and drivetrain setup.

    Ultimately, a supercharger is your best bet for making power at altitude. Yes, you could go the turbo route, but I think there's much more info, parts and support available for supercharged SBC's versus turbo'd SBC's. Even a small centrifugal blower (Paxton, Vortech) will really boost your power output at altitude. And they're 50-state legal.

    [​IMG] Semper Maintenance!
     
  14. mpascino

    mpascino 1/2 ton status

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    I've seen an 89 K-5 on 33's with nothing special except a paxton super charger out run newer vette to about 80 or so. Thats proof enough for me those things make a lot of power!

    You call that dirty!?
     

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