Timing Advance - advice needed
#1
Timing Advance - advice needed
I recently did a tune-up. With the timing jumpers jumped, I set the timing to 5-deg btdc. The vacuum advance takes it out to around 11 or 12.
I drove my 88Runner 22re for a few days, and the truck was great.
Then, not being able to leave well enough alone, I advanced the timing to 8 or 9-deg btdc.
It just sounded good there. So, I ohmed out TPS, reset RPM to 750, checked timing, wash-rinse-repeat.
At 8 or 9-deg btdc jumped, the advance takes it out to maybe 14 or 15 btdc.
I have no knock or other issues, just pulled a 1000 pound trailer 900 miles, and she has noticeably more pep-in-her-step around town.
If some “extra” timing advance increased my pulling under load (i.e., the trailer), and performance while just driving around, then why doesn’t everyone do this?
Why the 5-deg btdc factory recommendation? I must be burning the preverbal candle at the other end somehow. What am I missing?
Thanks in, well, advance...
I drove my 88Runner 22re for a few days, and the truck was great.
Then, not being able to leave well enough alone, I advanced the timing to 8 or 9-deg btdc.
It just sounded good there. So, I ohmed out TPS, reset RPM to 750, checked timing, wash-rinse-repeat.
At 8 or 9-deg btdc jumped, the advance takes it out to maybe 14 or 15 btdc.
I have no knock or other issues, just pulled a 1000 pound trailer 900 miles, and she has noticeably more pep-in-her-step around town.
If some “extra” timing advance increased my pulling under load (i.e., the trailer), and performance while just driving around, then why doesn’t everyone do this?
Why the 5-deg btdc factory recommendation? I must be burning the preverbal candle at the other end somehow. What am I missing?
Thanks in, well, advance...
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