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Old 08-03-2011, 12:20 AM   #1
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How can I force the revs to hang?

Besides holding the peddle down a tad with my foot, because the exactness and repeatability isn't there for me.

Is it something I can do with low load timing? (which I should be able to do for a narrow RPM range, right?)


With the new LW FW and the FRIM the RPM's drop like a stone during shifts. I'm not used to it and I'm shifting a little slow because of it, zero grinding though, which is nice.
If I could get the revs to drop slower in the 5,000RPM range would be perfect.


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Old 08-03-2011, 12:36 AM   #2
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I know your asking how to do it through the tune but I want to ask this for my own thoughts.

Wouldn't a light weight flywheel keep your RPM's up during a shift? Less rotating mass means it doesn't slow down as fast right?
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Old 08-03-2011, 12:50 AM   #3
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Slows down faster actually, less kinetic energy.
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Old 08-03-2011, 01:17 AM   #4
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create a vacuum leak
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Old 08-03-2011, 01:30 AM   #5
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Slows down faster actually, less kinetic energy.
Oh that make perfect sense. Makes it easier to rev up faster but at the same time will slow down faster. Again asking for myself.
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Old 08-03-2011, 08:30 AM   #6
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Drill a small hole in the throttle plate.
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Old 08-03-2011, 10:19 AM   #7
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Are you running the idle air comtrole valve ? if yes then change things in the tune and they will slow or hang like crazy depending on what and where you change them

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Old 08-03-2011, 01:59 PM   #8
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There is a hole in the throttle plate. It's a Mustang GT throttle body, 70mm.

Yes I'm running an IAC. I was hoping to not have to adjust it from where it is now, it works awesome as I have it now. And I'd like to get the revs to hang just during shifts near specific RPM's. The IAC can't do that. Which is why I'd hoped timing could.




There's what my low load timing is right now.
Stock is ~55 down to 3K, then drops down to ~45.
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Old 08-03-2011, 07:46 PM   #9
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Timing isnt going to stop the idle from droping or how fast it drops

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Old 08-03-2011, 07:53 PM   #10
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I think this is funny. Something we strive to get rid of on our cars is something your trying to get back lol.
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