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Evo X power/torque limit - stock block/trans

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Old Jan 22, 2013, 08:01 AM
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Originally Posted by vegittoss15
Interesting. Do you have any more information on this?
I run my stock trans at 9k and it feels pretty buttery smooth. And I am pretty sure ETS was doing 10k rpms on their stock trans, no dogbox.

I don't know that a dogbox is necessary at higher revs, preferable maybe.
Old Jan 22, 2013, 08:06 AM
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Originally Posted by murlo26
I run my stock trans at 9k and it feels pretty buttery smooth. And I am pretty sure ETS was doing 10k rpms on their stock trans, no dogbox.

I don't know that a dogbox is necessary at higher revs, preferable maybe.
For how long, though?
Old Jan 22, 2013, 08:08 AM
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Originally Posted by vegittoss15
For how long, though?
Who knows how long it will last.

I have been at 9k rev limits for about 13k miles.

ETS did tons of dyno time, track time and street driving but no idea how often they hit 10k rpms.

The trans isn't designed for those levels and even if people can rev that high typically we don't do it unless its needed, aka the track. So the length of time something works/lasts at that high of an rpm is, to me anyway, unknown on the X, too many variables.
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Old Jan 22, 2013, 08:09 AM
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Originally Posted by murlo26
Who knows how long it will last.

I have been at 9k rev limits for about 13k miles.

ETS did tons of dyno time, track time and street driving but no idea how often they hit 10k rpms.

The trans isn't designed for those levels and even if people can rev that high typically we don't do it unless its needed, aka the track. So the length of time something works/lasts at that high of an rpm is, to me anyway, unknown on the X, too many variables.
Right, I mean I never get to revs that high on my built motor anyways.
Old Jan 22, 2013, 08:11 AM
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the more you stress the engine, transmission, etc, heck... even tires, the more likely it is going to go out. shift at 7500rpm 200times a day, or shift at 12,000rpm one time a day.

threads like these really doesn't have to go on. its everywhere in the web.
Old Jan 22, 2013, 08:12 AM
  #36  
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Originally Posted by johnnnyjeans
the more you stress the engine, transmission, etc, heck... even tires, the more likely it is going to go out. shift at 7500rpm 200times a day, or shift at 12,000rpm one time a day.

threads like these really doesn't have to go on. its everywhere in the web.
Gives us something to read while we should be working
Old Jan 22, 2013, 08:14 AM
  #37  
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Originally Posted by murlo26
Gives us something to read while we should be working
Agreed. If a shop has proof that 9k is a definite limit, I would love to see information on that. I'm an "interesting stuff" kinda nerd.
Old Jan 22, 2013, 08:49 AM
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Originally Posted by murlo26
Gives us something to read while we should be working
That about sums it up right there, ha ha.
Old Jan 27, 2013, 09:13 AM
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*bump* John, do you have any more information regarding the 9k limit?
Old Feb 10, 2013, 10:36 PM
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With a built block, what kind of wtq numbers are safe on the drivetrain
Old Feb 10, 2013, 11:40 PM
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Originally Posted by Thatotherguy
With a built block, what kind of wtq numbers are safe on the drivetrain
Really depends on your driving skills. More power just gives you more ability to break stuff if you launch it wrong. It will take a LOT of torque to rip your transmission/transfer case/driveshaft/rear diff apart if you're just doing a pull in a gear. If it's gonna break, it's gonna do it on a launch, and then it's going to depend on your skill, your tires, your clutch, all sorts of stuff. There's not a magic number.

If you're spending the money to get to a point where you're worrying about it, spending a bit more to build the transmission probably isn't a big deal to you.
Old Feb 11, 2013, 06:33 AM
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Originally Posted by mirkendargen
Really depends on your driving skills. More power just gives you more ability to break stuff if you launch it wrong. It will take a LOT of torque to rip your transmission/transfer case/driveshaft/rear diff apart if you're just doing a pull in a gear. If it's gonna break, it's gonna do it on a launch, and then it's going to depend on your skill, your tires, your clutch, all sorts of stuff. There's not a magic number.

If you're spending the money to get to a point where you're worrying about it, spending a bit more to build the transmission probably isn't a big deal to you.
Simplified....

Drive like a tard = Break stuff

Drive like a normal person = it will last
Old Feb 13, 2013, 10:29 PM
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good info here. Thanks for this topic very helpful.
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