Author Topic: What is the best adjustment for engine TIMING ?  (Read 3136 times)

Offline plik

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What is the best adjustment for engine TIMING ?
« on: January 20, 2017, 10:52:53 AM »
What is the best adjustment for engine timing?

Is it exactly at 0, or do you like to set it a little before or after that?

And I'm just talking about regular daily driving -- in city, with occasional freeway stretches. I'm not towing, I'm not off-roading.

I have a 1987-1995 GM 350 5.7 TBI on a K20 (3/4 ton suburban) with 35 inch tires.


Offline Captkaos

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Re: What is the best adjustment for engine TIMING ?
« Reply #1 on: January 20, 2017, 06:22:20 PM »
TBI is set to zero and the computer controls the advance.  You have to disconnect the wire in the loom by the brake booster to set the timing.

Offline plik

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Re: What is the best adjustment for engine TIMING ?
« Reply #2 on: January 26, 2017, 12:59:28 PM »
Clarification on the original question:

I've always set mine to 0, but I wondered if anyone modified theirs at all to a number other than 0.

Offline bd

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Re: What is the best adjustment for engine TIMING ?
« Reply #3 on: January 26, 2017, 01:43:58 PM »
For emissions testing it's best to set at zero, although up to 2° BTDC is generally allowed.  For a slight improvement off the line and at low speed around town, up to 6° BTDC might work for a daily driver as long as there is no associated engine ping.
Rich
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