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How many horses will this configuration put out

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Blazer_Boy, Jul 30, 2001.

  1. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Sioux City, IA, USA
    I've been in the middle of a rather large restoration this summer and I'm already dreaming of winter engine upgrades on the crate motor in there. 1982 K5 with crate 350 has 20,000 miles.

    Here's what I wanna do

    -Header/Manifolds (Stainless steel ones used on 1-tons in the late 80's. Its shown on the lastest issue of 4-wheel & off-road

    -Dual 2 1/2" pipes with just a cat, no muffler (I went crazy over hearing the neighbors chevy and looked under to find just a cat. Trust me, it sounds sweet)

    -Retro-fit Comp cams roller cam .474 lift, 260 intake duration and 264 exhaust (with the coresponding roller lifters, rockers, etc...)

    -Ported heads

    -Edelbrock aluminum intake

    -K&N

    -MSD 6AL, Billet distributor, and 8.5mm super conductor wires

    -Slap another intake on the air cleaner housing

    -Throw out the 3.08 10-bolt and drop in a 3.73 12-bolt, Dana 44 goes in later. (going to do this next week.)

    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  2. Butch

    Butch 1/2 ton status

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    I would say definitely an increase of 2.5 horsepower

    I thought I was wrong once,
    but I was mistaken
     
  3. sapper

    sapper 1/2 ton status GMOTM Winner

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    beware of no mufflers. i thought that would be cool on my 82 had headers going through a fake cat and nothing else. you get tired of yelling at your passanger when going 25 mph real quick. everything else sounds cool though!

    We are surronded. That simplifies our problem.
     
  4. Wheels

    Wheels 1/2 ton status

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    Get with pureinsanity, he can refer you to a web site that shows you how to get 50 hp from a coffee can.....roughly guesstamating, about 275 to 300 high ball park figure (gross hp, not net). What's the compression ratio, type intake (Performer, Stealth), carb, type heads, valve size, etc.
     
  5. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Aww man, now you got ?s I haven't thought of yet. The motor is stock now so the compression is whatever a crate motor pumps out. The carb is q-jet m4me (tuned up), stock heads (will be ported). The intake is the edelbrock performer.

    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    You have a pair of those header/manifolds? I checked the part number, and I believe they were way over $200 a piece.
    ouch! : ) I wouldn't waste time porting your heads...get some Vortecs or better...you need to have all the machine work done to your heads, it will be as cheap or cheaper to get brand new Vortecs, and more productive.

    IMO save your money on the distributor and ign. box, total waste of time on a non high RPM motor.

    Neighbors '88 350 has just a cat..I think it sounds good too..but its a pickup, the blazer may be louder because of the cab...


    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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