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Computer chip....worth the money????

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Bigmeats, Aug 27, 2003.

  1. Bigmeats

    Bigmeats 1/2 ton status

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    I just bought a 91 Gmc 2500 4x4 and it seems a bit slugish.
    A couple of my more mechanically inclined frieds felt that i had a major restriction in the exhust so I just put dual exuast from headers back with with 2 flow masters on her and still seems to be the same.(needed to be anyways way to quiet) So now I am thinking of getting the thermo hypertech chip. Need some opinions from people who have done this and if this is a worhty mod or not. I do use this for my landscape business and am pulling a trailer alot!!! Also how did your gas milage change with this chip....better or worse.

    Thanks all in advance!!!!
     
  2. mud390

    mud390 1/2 ton status

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    What kind of motor does it have? Have you done the standard tune up stuff? A guy I work with put a power programmer on his 03 GMC with a 4.8L. Seemed to help a lot. Nice firm shifts now. "Seat of the pants" power is more noticable. No top end limiter either.

    Kris
     
  3. Bigmeats

    Bigmeats 1/2 ton status

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    oops...its a 350, 60,000 miles on her, and reg tune up schedualed for this weekwnd...plugs, wires and cap.
     
  4. SUBFAN

    SUBFAN 1/2 ton status

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    Power programmer doesn't work on his '91....
     
  5. sled_dog

    sled_dog 1 ton status

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    my 95 is the same way, sluggish as they get. Does yours have a 4l80e? ANd what gaer ratio? I'm running y pipe to cat and then flowmaster 40. Without the cat it was quite loud and good sounding but no increase in go. I think one of my injectors is going bad so I don't know. Haven't heard great things about chips. Power Programmer is not an option at all on TBIs.
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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    But a chip does essentially the same thing.
     
  7. sled_dog

    sled_dog 1 ton status

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    not really. On the vehicles that can use power programmers there is more adjustability and more hidden power. All chips do on TBIs is maybe fool the computer into throwing a bit more fuel at it and advance the timing. In the end you have to run higher octane gas and you get a small increase. Premium fuel is $1.95 a gallon here right now so forget a chip for me. Then again I'm selling my 95 and goign back to my K5 which has 9.3:1 compression and I shoudl run on premium most of the time.
     

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