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Mivec advantage?

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Old Oct 22, 2009 | 08:51 PM
  #76  
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Originally Posted by MR Turco
so is everyone using the same intake/exhaust map in both tables (#1 & #2)? I couldn't find any information on when the ECU uses one or two.
Not sure. Anyone?
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Old Oct 22, 2009 | 08:56 PM
  #77  
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From what I gather, the ECU uses #2 under normal operation. Many are making 1 and 2 the same.
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Old Oct 22, 2009 | 09:23 PM
  #78  
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Yes, it would be helpful on more information regarding how the EVO X MIVEC is setup and really what makes it tick.

It seems there is really very little knowledge floating around how to setup the 4 maps. I guess some more insight would be great. :-)
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Old Oct 22, 2009 | 10:04 PM
  #79  
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I was under the impression that #1 was warmup MIVEC.

It would make sense.
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Old Oct 23, 2009 | 12:03 AM
  #80  
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#1 is run until 147f, then it interpolates with #2 until 170f then #2 runs 100%

- bryan
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Old Oct 23, 2009 | 09:09 AM
  #81  
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Originally Posted by GST Motorsports
#1 is run until 147f, then it interpolates with #2 until 170f then #2 runs 100%

- bryan
Does that only apply to intake? or exhaust as well? both?

Thanks Bryan
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Old Oct 23, 2009 | 09:42 AM
  #82  
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Both. I wasn't aware of the interpolation between 147 and 170, but that's good to know.
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Old Oct 23, 2009 | 10:32 AM
  #83  
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Originally Posted by xPRimNT
Both. I wasn't aware of the interpolation between 147 and 170, but that's good to know.
x2
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Old Oct 23, 2009 | 04:38 PM
  #84  
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Variable valve timing is amazing isn't it!
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Old Oct 23, 2009 | 04:40 PM
  #85  
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Thats some crazy stuff
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Old Oct 23, 2009 | 09:16 PM
  #86  
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Originally Posted by 4G63DSM
Variable valve timing is amazing isn't it!
Variable CAM Timing. Variable valve timing is on Hondas.
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Old Oct 23, 2009 | 09:32 PM
  #87  
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Originally Posted by BigT
Variable CAM Timing. Variable valve timing is on Hondas.
Ummm... it's variable valve timing still - the cam timing IS the valve timing. In fact, MIVEC stands for Mitsubishi Innovative Valve (timing) Electronic Control (system). Honda's i-VTEC includes variable valve lift as well, in addition to variable valve/cam timing.
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Old Oct 25, 2009 | 06:40 PM
  #88  
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Originally Posted by GST Motorsports
#1 is run until 147f, then it interpolates with #2 until 170f then #2 runs 100%

- bryan
based on what temp ? from air temp ? coolant ?
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Old Oct 25, 2009 | 06:45 PM
  #89  
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very impressive results. keep us posted
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Old Oct 25, 2009 | 07:05 PM
  #90  
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Originally Posted by E6-X
based on what temp ? from air temp ? coolant ?
I'm quite sure it's coolant temp, your car will start adjusting LTFM as needed a few seconds after it hits 170F and that's considered full operating temp as far as the ECU is concerned. For the Mivec settings on my car I ended up making the #1 warmup maps just a less aggressive version of #2 full operating temp maps. Granted I avoid hammering on the car when it's warming up but it's good to know that in case I forget it should be tuned to accomodate it safely.

It likely won't make a ton of difference but lets say you disabled the timing retard during warmup or reduced it like I did to avoid hesitation, then run 25+ psi boost via an MBC, and then run full aggressive Mivec settings. If you make a habbit of going WOT right after the car is started up you will have a higher risk of breaking something or at least adding in some pre-mature wear to various parts.
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