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  1. #1

    Default Bolt-on parts to increase power

    I have a 97 silverado, looking to get a little more power and efficiency out of the 350. I already have custom dual exhaust, K&N cold air intake, and a so far unnoticed power programmer. Any suggestions or pointers would be nice. The truck is lifted and I get around 12 MPG, although I know I shouldn't look for mpgs and lift in the same thing, help would be nice! Thanks
    '97 silverado, 6" suspension lift, 35x12.50x17s, K&N cold air intake, Hypertech power programmer, dual exhaust with Flowmaster super 44s

  2. #2

    Default

    There are no "bolt-on" modifications that will give you any REAL gain. You can easily spend thousands of dollars on "snake oil" magical power parts and get marginal results at best. Save your money and buy a supercharger.

    What size tires are you running? Have you considered re-gearing? That will be the best bang for your buck.
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  3. #3

    Default

    well its a daily driver and supercharger is a little out of the price range! ha but im running 35s
    '97 silverado, 6" suspension lift, 35x12.50x17s, K&N cold air intake, Hypertech power programmer, dual exhaust with Flowmaster super 44s

  4. #4

    Default

    When ever you increase the diameter of the tires, you change the effective gear ratio, you have made it more difficult for the engine to turn the wheels.

    If you go back to factory tires, you will find the missing power.

    I know factory tires and lift should not be used in the same sentence, haha; so, as @moogvo suggested a sear set change that recreate the original ratio would be the fix.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  5. #5

    Default

    Quote Originally Posted by sthpaw11 View Post
    well its a daily driver and supercharger is a little out of the price range! ha but im running 35s
    Procharger makes a great kit that will fit your truck. you can expect upwards of 60-65% power increase. and as far as daily driver goes, if you can keep your foot out of the pedal and drive conservatively you can see some great gains in mpg. i would also suggest long tube headers and an x-pipe. and to beat the dead horse regearing. but i think you would fall instantly in love with that procharger.

  6. #6

    Default

    Quote Originally Posted by moogvo View Post
    There are no "bolt-on" modifications that will give you any REAL gain. You can easily spend thousands of dollars on "snake oil" magical power parts and get marginal results at best. Save your money and buy a supercharger.

    What size tires are you running? Have you considered re-gearing? That will be the best bang for your buck.
    I'll second this advice. I have owned cars/trucks for a lot of years, done lots of things to them. Take it from a veteran of the auto world, the only way you get real power increases is by doing internal engine modifications. The spacers, exhaust, intakes, that stuff is like putting lipstick on your truck. Any "gains" in power from these is minimal at best.
    1994 Chevy K2500 Silverado, 454 (modified), original owner.
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  7. #7

    Default

    From what I have read, TBS are ineffective at giving more HP and torque EXCEPT in a TBI engine, what the OP has.

    Also Hypertech claims 20HP and 45 torque from using one of their modules. Also when the OP put on these larger tires did he tell the ECM what the new tire size is?

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