where is it best to increase timing?
Thread Starter
TECH Resident
Joined: Aug 2003
Posts: 960
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From: Central, FL
where is it best to increase timing? is it better to have more timing below 4000 rpm then it is to have more above 4000 rpm....
which will make the most power?
above, below, or all over?
which will make the most power?
above, below, or all over?
TECH Resident
Joined: Dec 2004
Posts: 845
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From: K-W, Ontario
Too vague of a question.
What gear, engine load, etc.
Timing is normally advanced as RPM increases under wide open throttle.
There is a limit to how much, and at times, pulling timing as combustion
becomes more efficient can make more power.
What gear, engine load, etc.
Timing is normally advanced as RPM increases under wide open throttle.
There is a limit to how much, and at times, pulling timing as combustion
becomes more efficient can make more power.
Thread Starter
TECH Resident
Joined: Aug 2003
Posts: 960
Likes: 1
From: Central, FL
load would be a track only WOT tune for a 90% pump gas/10% 105 w/ afr at 13.2
and actually, I have a 4K stall, and it flashes to 4250, so nothing matters below 4K for me
timing is between 26-28 on WOT runs
and actually, I have a 4K stall, and it flashes to 4250, so nothing matters below 4K for me
timing is between 26-28 on WOT runs
Originally Posted by seadoo
load would be a track only WOT tune for a 90% pump gas/10% 105 w/ afr at 13.2
and actually, I have a 4K stall, and it flashes to 4250, so nothing matters below 4K for me
timing is between 26-28 on WOT runs
and actually, I have a 4K stall, and it flashes to 4250, so nothing matters below 4K for me
timing is between 26-28 on WOT runs
You're going to want more timing below 4000 RPM.
Piston speed is high and cylinder filling is poor. The only time you're at that RPM is in 1st gear which means loading is relatively low, so It will want more timing.
If you're using an accelerometer that will display your MPH at the 60 ft mark, then that's a good data point to watch when adding this spark advance.
TECH Enthusiast
Joined: Sep 2004
Posts: 564
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From: Omaha, NE
Like previously stated, it varies from car to car. Often I find that I have to decrease advance around the engines peak torque RPM range, its peak cyl pressure, and then gradually advancing all the way to redline.
