TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

305 TBI upgrades

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Old Dec 28, 2002 | 07:01 PM
  #1  
89 RS vortec 35's Avatar
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305 TBI upgrades

My friend just bought an '88 Formula with a 305, 700r4, and a TBI, what are some easy and relatively inexpensive upgrades such as computer chips, intake manifold, that would help the power. I'm looking for things that won't take more than a day or so to install.
THanks for the help.
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Old Dec 28, 2002 | 10:15 PM
  #2  
firebirdpl's Avatar
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From: Long Island, NY
Car: 89 Formula
Engine: 305 TBI
Transmission: 700R4
start with full exhaust, headers and catback, then do gears and a posi. most chips arent worth the money. also go to a dual snorkal or open element air cleaner, that will make a difference, as well as opening up the hood schoop
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Old Dec 29, 2002 | 01:43 AM
  #3  
iroczrockz's Avatar
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From: Summerville, SC
Car: 91 RS Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
Do a search for Ultimate TBI mods on here too. That should take about a day. I also installed underdrive pulleys from March. They advertise 11 hp gain at the rear wheels for under $100, but they slow your alternator down a little. No problems though for the past 3 years.
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Old Dec 29, 2002 | 11:10 PM
  #4  
tbfirebird's Avatar
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From: waukesha,WI
Car: Black 89 Formula
Engine: ??????????
Transmission: ??????????
ive also got a 305 tbi with an open element you should get that it helps alot besure to put a vaccum plug over the vaccum fitting.
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Old Dec 29, 2002 | 11:48 PM
  #5  
NJ SPEEDER's Avatar
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From: Ewing, NJ
start with ultimate tbi mods parts 1&2, open element air cleaner, adn diy afpr. all from teh tech articles. pulleys don't make much of a difference and off teh shelf chips are a waste of money, spend an hour making the diy afpr and adjsut your base timing will get you more than teh $130 chip.
anothe rgood place to make up a lot of performance is the rear gears. most stock auto's have 2.72 one leggers. get a V6 rear from teh salvage yard, swap in a posi carrier in place fo teh differential and you have an instant 3.42 posi rear that will really pick up the performance of teh car.
exhasut is also a nice place to make a gain, teh stock y-pipe is a complete joke. if you are on a budget teh flowmaster american thunder and hooker cat backs ae both reasonably priced and soudn pretty good. then go to your local exhaust shop and have them make you a nice y-pipe and replace teh stock cat with a 3inch unit. a good Y and 3 inch mandrel bent tubing is worth a lot fo power and a great exhaust note.
these things are a great place to get started. there are intakes and other parts available that will help a lot too, but these are the things to take care of first.

later
tim
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Old Dec 30, 2002 | 03:25 PM
  #6  
91Bird305's Avatar
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From: Davison / Troy ,Michigan
Car: 1991 Pontiac Firebird
Engine: 3.8
Transmission: 700r4
Axle/Gears: Dana 60
Tim (NJ Speedster) said a lot of good stuff to do. If ya need anymore help with a certain modification just make a post. Check out my second website in my sig too. Has lots of info on all of that stuff. Good luck buddy.
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Old Dec 31, 2002 | 09:10 AM
  #7  
iroczrockz's Avatar
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Joined: May 2002
Posts: 813
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From: Summerville, SC
Car: 91 RS Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
most stock auto's have 2.72 one leggers.
I like that, one leggers,
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Old Dec 31, 2002 | 02:41 PM
  #8  
camaronewbie's Avatar
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Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
91Bird305.... FYI

It's 12/31/02 at 3:45pm EST - None of the links work on your mods page at
http://hometown.aol.com/j007golden/modeval.html

Thought you'd like to know.
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