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Evo VIII vs Evo IX gearing

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Old Feb 16, 2007 | 12:55 PM
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Evo VIII vs Evo IX gearing

Well im thinking of trading in my VIII for a IX... I like the performance reviews i have read here, and it seems the IX performs much better in terms of power than the VIII with less mods and less cash.. My question and concern is the gearing.. Im planning on putting a bigger turbo and plan to run 10s with the IX once im done.. I know the IX gear ratio is shorter, is it true that 4th gear only goes to 116 in the 1/4 bouncing off the rev limiter as opossed to the VIII? I have seen one member here run 11.4@119 with a IX, i believe his screename is Fimotorsports.. Did he do this shifting to 5th or did he stay in 4th? Im just asking all these questions before i trade in my VIII.. Thanks
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Old Feb 16, 2007 | 01:21 PM
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FImotorsports= Dan Bajalis...to my knowledge he doesn't shift, he just revs it up real high.
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Old Feb 16, 2007 | 01:27 PM
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You will definitely have to shift to 5th for 10s unless you do some extensive head work to allow for very high RPMs.
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Old Feb 16, 2007 | 01:34 PM
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From: SlowmotionMotorsports.com
Yep ^^^^
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Old Feb 16, 2007 | 01:36 PM
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Originally Posted by Warrtalon
You will definitely have to shift to 5th for 10s unless you do some extensive head work to allow for very high RPMs.
Where does 4th gear for the IX limit to as far as mph wise with the limiter set at 8k?
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Old Feb 16, 2007 | 01:42 PM
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From: NNJ
Originally Posted by BoostedEvoVIII
Where does 4th gear for the IX limit to as far as mph wise with the limiter set at 8k?
Here ya go


Last edited by dudical26; Feb 16, 2007 at 01:48 PM.
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Old Feb 16, 2007 | 01:47 PM
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Originally Posted by BoostedEvoVIII
Where does 4th gear for the IX limit to as far as mph wise with the limiter set at 8k?
Not a 100% valid question, because trap speeds are an average speed through the last two blocks, so even if you can get to 120mph by 8k on your speedometer, your trap speed will only be 117-118 or so. For 10s, we're talking 125 at the BARE minimum, which is way up in the RPMs for 4th gear on a IX...

Plus, if you want to go big and hit 10s, why do you need a IX? The main benefit of the IX is on the stock turbo up to 400whp. You could just as easily get an old, busted 03 for cheap, build the motor, toss in a Shep trans, get a BR GT35R with AEM EMS and go low 10s all day on C16.
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Old Feb 16, 2007 | 01:56 PM
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i say build the bottom end and valvetrain, run a taller tire and you should be fine to 9k and 10 second runs
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Old Feb 16, 2007 | 01:58 PM
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Originally Posted by Warrtalon
Not a 100% valid question, because trap speeds are an average speed through the last two blocks, so even if you can get to 120mph by 8k on your speedometer, your trap speed will only be 117-118 or so. For 10s, we're talking 125 at the BARE minimum, which is way up in the RPMs for 4th gear on a IX...

Plus, if you want to go big and hit 10s, why do you need a IX? The main benefit of the IX is on the stock turbo up to 400whp. You could just as easily get an old, busted 03 for cheap, build the motor, toss in a Shep trans, get a BR GT35R with AEM EMS and go low 10s all day on C16.
Thats what i meant, mph IN the 1/4 mile.. Ive read a lot of guys hitting the rev limiter at 115-116 traps, so is that the limitation?
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Old Feb 16, 2007 | 02:00 PM
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Originally Posted by Warrtalon
Not a 100% valid question, because trap speeds are an average speed through the last two blocks, so even if you can get to 120mph by 8k on your speedometer, your trap speed will only be 117-118 or so. For 10s, we're talking 125 at the BARE minimum, which is way up in the RPMs for 4th gear on a IX...

Plus, if you want to go big and hit 10s, why do you need a IX? The main benefit of the IX is on the stock turbo up to 400whp. You could just as easily get an old, busted 03 for cheap, build the motor, toss in a Shep trans, get a BR GT35R with AEM EMS and go low 10s all day on C16.
i really wish i'd done this to begin with isntead of buying a brand new evo

btw will someone post the gearing chart for the 05 MR 6-speed's 4th gear please
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Old Feb 16, 2007 | 02:01 PM
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From: NNJ
Look at the numbers I posted. You can easily raise the rev limiter to 8k on a stock motor and go 122.1 MPH. That would be good for at least 120 - 121 trap speed.

But I agree with Warrtalon, if its a 10 second car your after, there is no real point to go with a IX.
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Old Feb 16, 2007 | 02:03 PM
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From: NNJ
Originally Posted by Kee1pride
i really wish i'd done this to begin with isntead of buying a brand new evo

btw will someone post the gearing chart for the 05 MR 6-speed's 4th gear please
You got it

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Old Feb 16, 2007 | 02:07 PM
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122 max speed at 8k would not be a 120-121mph trap, unfortunately.

BoostedEvo, no, 115-116 is not "the limitation." Do you even know where those guys had their rev limiter set? We don't just have one rev limiter - we can set it wherever we want. The problem is that you can't go as high as you want without building the motor to sustain high rpms. Our stock rev limiter is 7600, which only allows for 110-112mph traps on a IX. At 7800, you see people doing 114-116, but I'm not sure what people trap when hitting their rev limiter at 8k, not to mention tire diameter makes a difference on this, too.
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Old Feb 16, 2007 | 02:07 PM
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Originally Posted by Warrtalon
You will definitely have to shift to 5th for 10s unless you do some extensive head work to allow for very high RPMs.
In addition to what you said also Clayton, by drastically modifying his gear ratios via overall tire diameter.

Carlos
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Old Feb 16, 2007 | 02:09 PM
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From: NNJ
If a 122 max will not net a 120 trap, what will it net?

In general how much slower is your "trap" then your actual finishing speed?
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