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Old Jan 13, 2009, 10:34 PM   #1
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Mivec advantage?

Today I had a couple extra minutes to do a comparison on a Evo 10. I don't think I have seen anyone post the differences that can be had between the 100% factory Mivec maps and some "tuned" Mivec maps.

So after tuning this stock Evo 10 I threw the factory Mivec maps back in and did a couple pulls.

Disclaimer: This is not an exhaustive test. I just had some free time to do a very quick comparison. I actually am planning on showing a more exhaustive test on the mivec maps here very soon. Stay tuned for that.

Dotted lines are with tuned intake and exhaust Mivec maps. Solid lines are with 100% factory tuned intake and exhaust Mivec maps.



I'm only showing up to around 5400 rpm as I have yet (so far at least. ) to see very large gains in mivec tuning up top on a stock 10. Let's just look at the curves from the low to the midrange for now.

At 3000-3500 rpm, there is a 45wtq gain with the tuned mivec maps. At 3900, approx 30+ wtq gains. Other than that large torque increase there are huge gains in the way the torque comes in and carries over through the midrange.

This map I am working on actually has some more room in it from 4000-5500rpm as well. I plan in tweaking it a bit more before I post a more "exhaustive" look at Mivec tuning and it's benefits.
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Last edited by GST Motorsports; Jan 13, 2009 at 10:39 PM.
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Old Jan 13, 2009, 10:39 PM   #2
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Awesome numbers GST, keep up the great work.

Last edited by Noize; Jan 14, 2009 at 05:24 PM.
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Old Jan 13, 2009, 11:44 PM   #3
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Wow , great info. You guys are near Madera right?
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Old Jan 14, 2009, 12:42 AM   #4
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Originally Posted by Skyline559 View Post
You guys are near Madera right?
About 150 miles.
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Old Jan 14, 2009, 04:52 AM   #5
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how about doing a test on a stock car (minus the intake) so that we can only see what Mivec can do, thanks
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Last edited by pltek; Jan 14, 2009 at 05:08 AM.
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Old Jan 14, 2009, 05:07 AM   #6
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Florida has different air down there than you guys, but that's been pointed out already by weather posts. Last I heard there was not much to be gained by tuning MIVEC down there.


So this isn't really a fair comparison.
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Last edited by tkklemann; Jan 14, 2009 at 05:53 AM.
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Old Jan 14, 2009, 05:50 AM   #7
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Quote:
Originally Posted by GST Motorsports View Post
Today I had a couple extra minutes to do a comparison on a Evo 10. I don't think I have seen anyone post the differences that can be had between the 100% factory Mivec maps and some "tuned" Mivec maps.

So after tuning this stock Evo 10 I threw the factory Mivec maps back in and did a couple pulls.

Disclaimer: This is not an exhaustive test. I just had some free time to do a very quick comparison. I actually am planning on showing a more exhaustive test on the mivec maps here very soon. Stay tuned for that.

Dotted lines are with tuned intake and exhaust Mivec maps. Solid lines are with 100% factory tuned intake and exhaust Mivec maps.



I'm only showing up to around 5400 rpm as I have yet (so far at least. ) to see very large gains in mivec tuning up top on a stock 10. Let's just look at the curves from the low to the midrange for now.

At 3000-3500 rpm, there is a 45wtq gain with the tuned mivec maps. At 3900, approx 30+ wtq gains. Other than that large torque increase there are huge gains in the way the torque comes in and carries over through the midrange.

This map I am working on actually has some more room in it from 4000-5500rpm as well. I plan in tweaking it a bit more before I post a more "exhaustive" look at Mivec tuning and it's benefits.
How about spreading some love my way bryan ??

waiting for you to help me in the right direction !

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Old Jan 14, 2009, 05:54 AM   #8
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lol there is no way u gained that just from mivec tuning. maybe a stock tune vs a full tune with mivec maps
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Old Jan 14, 2009, 07:31 AM   #9
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I'm more interested about the whole power curb then a peak numbers...
So for me , the less peak number, but fatter power curb is more appealing.

great job !
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Old Jan 14, 2009, 08:01 AM   #10
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Post the maps! ;p
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Old Jan 14, 2009, 08:39 AM   #11
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Quote:
Originally Posted by STi2EvoX View Post
Z chip owners, eat your heart out. Just kidding, take it in stride. Awesome numbers GST, keep up the great work.
Scott made a post in another thread where the zchip CAN control MIVEC
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Old Jan 14, 2009, 09:23 AM   #12
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Quote:
Originally Posted by EVIL_EVO_VIII View Post
Scott made a post in another thread where the zchip CAN control MIVEC
No, it can't. I read the comment that scott made, and it was pretty clear. There were sections of the "custom load cell" that when tuned, could indirectly affect a small rpm range of the mivec tables, but never full control. Let's just say, hypothetically, that it could control the entire rpm range of mivec tables (which again, it can't). The factory mivec tables are junk and use static settings for huge portions of the rpm range in many load cells. Even by tricking the ecu into running a lower load cell's mivec mapping, the benefits will be minor. Without being able to alter it at the source (the best way) or even intercept it and manipulate it directly, the benefits of what mivec can really do will never be achieved. In any case, when I made my first post, I was just joking around. As you would say, "take it with a grain of salt." Back on topic.

Last edited by STi2EvoX; Jan 14, 2009 at 09:36 AM.
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Old Jan 14, 2009, 10:02 AM   #13
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Good comparison GST. Can't wait to see your more detailed analysis.
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Old Jan 14, 2009, 10:07 AM   #14
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Nice post GST.

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Old Jan 14, 2009, 10:09 AM   #15
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GST, when will the more "exhaustive test" be done? I am very curious as to the results of this. Great job so far man, keep it up.
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