MIVEC tuning
#16
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Originally Posted by andenbre
What I have noticed is that the map goes in steps of 4.8. 1st things first are we sure that this # translates directly into degrees of advance/retard? 28 degrees seems like alot of range.
28=7 degrees
???????
7 degrees sounds about right. I am just guessing here by the way.
Girlie
#17
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Originally Posted by Girlie
4.8steps = 1 degree
28=7 degrees
???????
7 degrees sounds about right. I am just guessing here by the way.
Girlie
28=7 degrees
???????
7 degrees sounds about right. I am just guessing here by the way.
Girlie
Keep in mind that the intake cam starts off life retarded in comparison to the 8 for better cold start up emissions. Ever notice how there isnt any EGR system on a IX?
Last edited by JohnBradley; Jul 11, 2006 at 09:29 PM.
#27
Thanks John.
What I propose to do is to do runs through 4th gear on the same straight, flat section of road on the same day with three different VVT maps. Then I will take the acceleration in RPM/sec at 500 RPM intervals and plot the graphs over each other. Then I will pick the timing that gives the best acceleration in each zone. This has worked well before to determine the best boost curve. Poor man's dyno, or realistic road based loading? (we don't have real time adjustment, and I don't like doing zones by locking the dyno speed and testing for maximum torque in each zone, I think it makes it flat on the road).
What I propose to do is to do runs through 4th gear on the same straight, flat section of road on the same day with three different VVT maps. Then I will take the acceleration in RPM/sec at 500 RPM intervals and plot the graphs over each other. Then I will pick the timing that gives the best acceleration in each zone. This has worked well before to determine the best boost curve. Poor man's dyno, or realistic road based loading? (we don't have real time adjustment, and I don't like doing zones by locking the dyno speed and testing for maximum torque in each zone, I think it makes it flat on the road).
#28
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+1 for real world testing...as long as it safe. That isnt my current map, though the only change is the integration of JDM RS advance in the lower rpm ranges to see if I could reproduce some of your high boost/low rpm results. So far it has been pretty promising. I will post that MIVEC map up when it is "ready".
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Originally Posted by jcsbanks
Thanks John.
What I propose to do is to do runs through 4th gear on the same straight, flat section of road on the same day with three different VVT maps. Then I will take the acceleration in RPM/sec at 500 RPM intervals and plot the graphs over each other. Then I will pick the timing that gives the best acceleration in each zone. This has worked well before to determine the best boost curve. Poor man's dyno, or realistic road based loading? (we don't have real time adjustment, and I don't like doing zones by locking the dyno speed and testing for maximum torque in each zone, I think it makes it flat on the road).
What I propose to do is to do runs through 4th gear on the same straight, flat section of road on the same day with three different VVT maps. Then I will take the acceleration in RPM/sec at 500 RPM intervals and plot the graphs over each other. Then I will pick the timing that gives the best acceleration in each zone. This has worked well before to determine the best boost curve. Poor man's dyno, or realistic road based loading? (we don't have real time adjustment, and I don't like doing zones by locking the dyno speed and testing for maximum torque in each zone, I think it makes it flat on the road).