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Old 08-23-2003, 08:54 PM
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350 TBI suggestions needed

I recently got a 1988 1/2 ton 4x4 Suburban that has the TBI 350 in it. It runs good, but needs some more power. I am thinking of putting another motor together to replace the one in it, but want to stay with the TBI setup.

If anybody has any suggestions on some good motor combinations using the TBI for making low end pulling power, let me know.

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Old 08-23-2003, 09:59 PM
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350 TBI

You can stick with your TBI system, and turn to the basic old hotrodding tricks. You can shop for TBI improvements at www.turbocity.com. May I suggest a set of Vortec heads coupled with the matching Vortec style, TBI compatible intake manifold and if you are adventurous, try stroking it to a 383. You can do these things and keep the simplistic style TBI system on it and still be rewarded with handsome power increases.
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Old 08-24-2003, 06:15 AM
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The word is, that the TBI unit is only capable of making around 330hp max. It is limited as far as it's capacity to flow a larger volume of air. The GM perfprmance Parts RamJet 355hp 350cid is a different technology that allows more hp.
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Old 12-06-2003, 12:05 AM
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First, put a good air cleaning system on it. A K&N air filter helps some, and a cold air system will help more. If you only want low-end torque, try the Hypertech performance chip. It will significantly help torque, and your sub will not downshift back and forth from overdrive all the time. To help out the midrange torque and hp, try installing a 1" throttle body spacer. It takes no more than 1 hour, and it will cost you as low as 30 dollars. A free flowing exhaust is another good improvement. Summit racing along with Gibson make shorty style headers that will bolt on to the existing crossover pipes without too much trouble. Headers will run anywhere from $150-$400. Good luck.
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Old 12-06-2003, 08:19 AM
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Dont forget that on a TBI system, any cam over 206 duration on the intake side will cause fits with the computer. I saw this on an old 350 swapped into a tbi truck. It had too big a cam. Truck wouldn't start very good and run poor, even with a matched chip. So they swapped out cam for a smaller one, it run fine after that.
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Old 12-06-2003, 10:28 AM
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Dont forget about that Caddy 500 settin down there Crman.
Howz life treatin ya dude? Youll have to stop up and see my new place. Bring the wife and kids. HG
Oh yea. Its about that time of year were your goats start gettin chapped lpis isnt it? LOL
I was built with the body of a God! To bad it was buddah.


Hemmies rat journal below.

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