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

Timing my TBI

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Old May 23, 2006 | 03:57 PM
  #1  
90Formula305's Avatar
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From: Modesto, Killmefornia
Car: 1990 Pontiac Firebird Formula
Engine: 305
Transmission: 700 R4
Axle/Gears: peg leg
Timing my TBI

What do i have to unplug to time it? I tried searching but cant find the answer.
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Old May 23, 2006 | 04:03 PM
  #2  
Dewey316's Avatar
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
You have to unplug the ESC, the plug is a brownish wire, located on the passanger side strut tower.
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Old May 23, 2006 | 04:12 PM
  #3  
tdmarz22's Avatar
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Joined: Jan 2006
Posts: 33
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From: CA
Car: 1989 camaro
Engine: 305 tbi
Transmission: 700r4 89
Axle/Gears: 2.73 :(
how exactly do u set the timing?
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Old May 23, 2006 | 04:16 PM
  #4  
Dewey316's Avatar
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
with the car off, un-plug the ESC connector. Start the car, use a timing light, time it to the desired base timing (stock is 0*, I like 4*). Turn the car off, reconnect the ESC. You will likely want to uplug the battery now, to clear the computer, otherwise you will get a ESC SES Light. Reconnect battery , start car, and you are done.

I am sure this is in one of the stickies though.
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Old May 23, 2006 | 04:19 PM
  #5  
90Formula305's Avatar
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Joined: Nov 2004
Posts: 279
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From: Modesto, Killmefornia
Car: 1990 Pontiac Firebird Formula
Engine: 305
Transmission: 700 R4
Axle/Gears: peg leg
I only have 60k on mine, how far up can i go with the timing?
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Old May 23, 2006 | 04:40 PM
  #6  
Dewey316's Avatar
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Joined: Mar 2001
Posts: 6,577
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
I found the best results with 4* advanced base timing. Above that and I actualy started to slow down at the track. The heads on our cars, do not need much timing, to perform at their best.
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