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

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Old 10-07-2003, 10:38 AM   #1
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Car: '89 Formula, '97 Z28, '88 Formula 350
Engine: 305 TBI(LO3)
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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 10-07-2003, 02:06 PM   #2
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maybe you should check the engine/gen.tech. board on this one.
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Old 10-07-2003, 03:03 PM   #3
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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 10-07-2003, 03:09 PM   #4
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how can you tell if if you have 9C1 injectors?
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Old 10-07-2003, 03:13 PM   #5
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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 10-07-2003, 05:18 PM   #6
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9C1 65# injections are yellow/brown
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Old 10-07-2003, 05:23 PM   #7
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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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Old 10-07-2003, 05:23 PM
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Reload this Page Injector size chart
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