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-   -   [MS3X] Usual Minimum and Maximum VVT Angles (https://www.miataturbo.net/megasquirt-18/%5Bms3x%5D-usual-minimum-maximum-vvt-angles-69493/)

sobodah 11-16-2012 12:40 PM

[MS3X] Usual Minimum and Maximum VVT Angles
 
Hello there,

Need to get some Minimum and Maximum angles from users of MS3X to see if the numbers I have are within parameters.

It's on:
Megatuned -> Advanced Engine -> VVT Settings -> Minimum (abs.degrees)
Megatuned -> Advanced Engine -> VVT Settings -> Maximum (abs.degrees)

I've had Min 260 and Max 307. Is there reference values from factory manual?

Thanks,
Sérgio,

redrider706 11-16-2012 02:56 PM

Look here...
https://www.miataturbo.net/megasquir...-tuning-64590/

sobodah 11-16-2012 04:26 PM


Originally Posted by redrider706 (Post 950517)

Hello,
Thanks I've seen it. They have about 18 degrees more than me.

Went to the car and made some logs, the issue is the following:

With the VVT in Test mode with 0% duty cycl the engine revs up and cuts at 5500rpms.
I can see in the logs, that the intake cam starts at 260 degrees at idle, then starts to move at 2000rpms till it reaches 250º at 5500rpms and the engine cuts (like a rev limiter).

Or
With the VVT operating with min angle 260, max angle 307 and vvt table at zero, the intake cam moves from 3º at idle to -5º at 5500 rpms then the engine cuts.

It's a little odd, because with 0% duty cycle at idle it is 260º and 100% duty cycle at about 3000 rpms its 307º. Here you have 47º.
But with VVT not operating you start with 260º at idle and it goes down to 250º at 5500 rpms.

Something is wrong, but don't know what.
Any ideias?

Sérgio,


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