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

Injector size chart

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Old Oct 7, 2003 | 09:38 AM
  #1  
chevypower's Avatar
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From: Panama City, Fl
Car: '89 Formula, '97 Z28, '88 Formula 350
Engine: 305 TBI(LO3)
Transmission: TH700R4(MD8)
Injector size chart

Are the 305 & 4.3L in jectors the same size? Also are they two injectors sizes for the 350, one for police and one for normanal cars? The 454 has one size, huh? Thanks, Bobby
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Old Oct 7, 2003 | 01:06 PM
  #2  
nick harmon's Avatar
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From: institute, wv
Car: 91 RS
Engine: LO3
Transmission: T-5
maybe you should check the engine/gen.tech. board on this one.
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Old Oct 7, 2003 | 02:03 PM
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dimented24x7's Avatar
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
I remember some of the sizes as being the following, but i could be wrong about a few.

4.3L -- 35 pph
5.0L -- 45 pph
5.7L -- 55 pph
5.7L -- 65 pph (9C1)
7.4L -- 90 pph and i beleive 85 pph in later models.
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Old Oct 7, 2003 | 02:09 PM
  #4  
nick harmon's Avatar
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From: institute, wv
Car: 91 RS
Engine: LO3
Transmission: T-5
how can you tell if if you have 9C1 injectors?
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Old Oct 7, 2003 | 02:13 PM
  #5  
dimented24x7's Avatar
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From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
the color codes... There will be a small dab of paint on the terminal post or the metal doohickie in the center of the injector. I dont know the color codes offhand but an iternet search should reveal them.
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Old Oct 7, 2003 | 04:18 PM
  #6  
vjo90RS8's Avatar
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From: San Jose, CA
Car: 2002 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23
9C1 65# injections are yellow/brown
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Old Oct 7, 2003 | 04:23 PM
  #7  
nick harmon's Avatar
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From: institute, wv
Car: 91 RS
Engine: LO3
Transmission: T-5
wow, the boneyard bonehead wasnt sh!@n' me. they are 65#. no wonder my WOT really bites the big one! oh yeah, mine have yellow paint dabs on the metal dohickies.
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