a/x trans gear set options, what works? |
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a/x trans gear set options, what works? |
Trekkor |
Jun 15 2005, 08:49 PM
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#41
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I do things... Group: Members Posts: 7,809 Joined: 2-December 03 From: Napa, Ca Member No.: 1,413 Region Association: Northern California |
What is your favorite combo.
I need to stay in the 4500-6500rpm powerband. I can tach out at 7-7300rpm on the limiter. I have a spare trans I can build up now and then install... whenever. KT |
ArtechnikA |
Jun 16 2005, 06:04 AM
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#42
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
that can't be right... your typical 6 has peak torque around 4000, peak HP around 6500. with a 1000 rpm drop between gears, if you shift at peak torque + 500, you spend at least half your time on the side of the curve where both torque and HP and low. what studies have shown is that you want to shift when the power in the new gear is no less than the gear you are leaving. this can even be above peak HP and a couple of thousand rpm over peak torque. running the engine between peak torque and peak HP is the sweet spot. there may be a study showing low ET benefits from operating below peak torque - i'd love to read it - but it will be with a skeptical eye... |
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