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

TBI MOD 1

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Old 01-09-2012, 09:06 PM
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Car: 1988 iroc
Engine: 350 30 over
Transmission: T5
Axle/Gears: Series 2 373
TBI MOD 1

had not much to do today when I got home from work so I

Dismattled the tbi from my 305 and did the 1st mod








one side ground down


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both sides done

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next was to flare the grind down to make a nice flow for air

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Last edited by trafficlightguy; 01-09-2012 at 09:09 PM. Reason: added more photos
Old 01-09-2012, 09:27 PM
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Car: '90 RS
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73 Open
Re: TBI MOD 1

Nice progress you're making here. What are you using for this, a dremel tool or a die grinder?
Old 01-09-2012, 09:32 PM
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Join Date: Jun 2010
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Car: 1988 iroc
Engine: 350 30 over
Transmission: T5
Axle/Gears: Series 2 373
Re: TBI MOD 1

air powered die grinder and then 80 grit sand paper on a spindle
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