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Timing an 1990 5.7

Tiny
INDY400
  • MEMBER
  • 1990 CHEVROLET TRUCK
Hi all my 1990 gmc is timed at 0 degrees btdc if I went to 2 degrees how much performance is gained and would I notice a change in power thanks.
Monday, April 9th, 2007 AT 8:49 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You want more power use a 10K ohm resistor bridge the coolant temperature sensor connector this will fool the computer of thinking the engine is cold and wants fuel at all times-in other words it won't go in closed loop for the O2 sensor to take over the fuel demand.
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Tuesday, April 10th, 2007 AT 5:56 PM
Tiny
HBAUGH
  • MEMBER
  • 8 POSTS
If you time your vehicle to 8-10 degrees your motor will run better. Then make sure your spark advance is working and check to see how much advance you are getting when you rev the motor up.
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Tuesday, April 17th, 2007 AT 9:54 AM

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