Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Any good ideas for this engine

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by wayne, Dec 9, 2001.

  1. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    I picked up an 89 350 tbi engine today to rebuild for my truck. I am not planning to make a 383 although it would be nice.[​IMG] I am not looking for 500 hp either. I just want good reliability and something decent on the trails. I have built a few carb engines in the past but this is the first tbi one for me. I plan to use the block, crank, rods, and heads. If I go to vortech heads that will be down the road a bit so for now they are out of the picture. For a cam I am thinking either Comp Xtreme part # CCA-12-235-2 with Duration @ .050" 210/218 and lift is .447/.462. or Comp Xtreme # CCA-12-239-3 which is 218/226 duration at .050" and .462/.480 lift. I am leaning toward the first one for more bottom end grunt and I think it might match the tbi better. Any ideas on this and what I should do to it?

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,164
    Likes Received:
    1,360
    Location:
    E-town baby!
    I think both cams are a little 'hot' for a TBI motor...
    Do you have the dyno simulation link? You can then plug the numbers in yourself and see what kinda numbers you might expect. Personally I'd stay a little nearer to stock...

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  3. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    No I don't have any dyno programs. I also thought the second cam was a little hot for the tbi. The bad part is I don't have the stock #'s for a factory tbi cam.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  4. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    I think both those cams are too much for a stock TBI. If you decide on either of them you will proababally need to reprogram the prom chip. And to get the most out of those cams a bigger TBI would be nice.
    If you are goin to keep the TBI/ prom chip stock. Get a cam somewhere around 196/214 dur and .400 to .440" of lift That should work without any mods to the chip.
     
  5. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    Thanks. I didn't think the first one would be that bad but not knowing the stock cam specks does not help. I will do some mods to the tbi but I don't want to get into messing with the chip. The truck does ok with the tired 350 in it now and I want to keep a low rpm power range for rock crawling. Like I said though it is the first tbi engine I played with and I know the cam choise will be very limited.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  6. chevyracing

    chevyracing 1/2 ton status

    Joined:
    Sep 8, 2001
    Posts:
    2,589
    Likes Received:
    0
    Location:
    Colorado
    What's wrong with the cam that is in it?

    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>BLAZER PICS</a>
     
  7. MudFrog

    MudFrog 1/2 ton status

    Joined:
    Feb 23, 2000
    Posts:
    3,236
    Likes Received:
    0
    Location:
    Daleville, Va
    I don't remember the make or model, but supposedly there is a cam made just for TBI engines that runs good with the stock setup. It's supposed to increase your torque, hp and gas mileage. I'll look around and see if I can find it.

    89 K5 Silverado, 4", 33's, 3/4 ton axles
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  8. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    Edelbrock makes a matched cam and manifold kit for 350 TBI .It is the Performer series which is better for trucks and low rpm torque. than the RPM series. The specs on the cam are:Lift: .398 int .442 ex dur 194/214 the whole kit (manifold,cam and lifters is around 350.00
    Comp cams also has some cams that work good with TBI

    <P ID="edit"><FONT class="small">Edited by Thunder on 12/10/01 07:47 AM.</FONT></P>
     
  9. MudFrog

    MudFrog 1/2 ton status

    Joined:
    Feb 23, 2000
    Posts:
    3,236
    Likes Received:
    0
    Location:
    Daleville, Va
    Any idea what kind of improvements should be seen using it? I want to rebuild my engine with tax returns and thats about how much I'm looking to spend in upgrades.

    89 K5 Silverado, 4", 33's, 3/4 ton axles
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  10. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    Nothing is wrong with the cam that is in it. The engine ran when it was pulled but it is tired like the one in my truck. Also I would not put a cam in a rebuilt engine when the cam has over 100k on it.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  11. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    I looked at the Edelbrock stuff last night and might go that route with it.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     

Share This Page