The 18psi MS PNP-Pro questions thread (Attention DIYAutotune) - Page 11 - Miata Turbo Forum -Boost cars, acquire cats.

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Old 08-20-2016, 02:03 PM   #201
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Quote:
Originally Posted by Chiburbian View Post
I'm laughing because the original questions asked in this thread were asked again by me a couple months ago almost verbatim. I will have to re-read this thread now.

Btw, I THINK I have modified my MSpnpPro to get operational VCTS, Clutch/launch, Charcoal cannister purge, etc. If I don't see the answers in this thread when I am done catching up I will post the instructions. If not, it's in my build thread.
Would love to see your build.
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Old 08-20-2016, 09:51 PM   #202
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Quote:
Originally Posted by Cmplxbewst View Post
Would love to see your build.
Two of the posts that are most relevant to this discussion at the moment:
Chiburbian's 01' Lots of potential, no follow-through build

Chiburbian's 01' Lots of potential, no follow-through build

Note that the picture in post 517 is incorrect but the text is correct. I haven't had time to correct the pinouts on my unit yet.
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Old 08-22-2016, 04:26 PM   #203
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Originally Posted by Lokiel View Post
I'm in the process of tuning my DIY Autotune MSM PnP-Pro and would like to point out an error with the default MAP provided by DIY Autotune - this thread seems like a good place to consolidate this type of info.

The PWM Idle Control Valve frequency was set to 383Hz which I believe is the NA value for the valve - the NB uses a different valve.

On Adaptronic ECUs, this needs to be set to 500Hz on NBs and researching on the net indicates that for NBs using a Megasquirt it should be set to 511Hz.

Is this a big issue and has anyone found any other errors with the default MAP?
My current tune on my MSM is running PWM Idle Control Valve Frequency of 383Hz. What would changing this to 511Hz do to this tune?
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Old 08-22-2016, 04:36 PM   #204
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Changing the idle valve frequency will just potentially change the duty cycle values you need for certain idle RPMs. You might need to retune all idles, open and closed loop.

511hz is faster than 383hz, so the valve might require less duty cycle to pass the same airflow or something like that. Or it might need more, the valve does have mass and resists movement a bit.

Really, if it is working for you already don't change it. If you run a frequency too far out of spec for the valve it might not have a big enough linear section of duty cycle to use CL idle right, in my 1.6NA idle valve experience. You might want to change it then.

NA also likes ~170hz or 153? or whatevers closest. It's also wrong for the NA basemap too.
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Old 08-22-2016, 04:38 PM   #205
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I'm curious if anyone actually tested and/or knows the valve freq of the NB? Not a guess, not "this worked for me", but the real deal.

I believe we discussed this YEARS ago when setting up our very first production adaptronics, but totally forgot what we ended up with. I'll check my notes (if I still have them) when I'm bored. I know that at least one of the vendors (I believe Rev, or maybe even DIY) specifically states in their instructions NOT to ever touch the valve freq from what it's set to originally.
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Old 08-22-2016, 05:13 PM   #206
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Get rid of that idle valve and your problem is solved #becauseracecar
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Old 08-22-2016, 08:08 PM   #207
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Quote:
Originally Posted by 18psi View Post
I'm curious if anyone actually tested and/or knows the valve freq of the NB? Not a guess, not "this worked for me", but the real deal.

I believe we discussed this YEARS ago when setting up our very first production adaptronics, but totally forgot what we ended up with. I'll check my notes (if I still have them) when I'm bored. I know that at least one of the vendors (I believe Rev, or maybe even DIY) specifically states in their instructions NOT to ever touch the valve freq from what it's set to originally.
Just a little bit here is all I have seen:

Some Miata PWM idle motor frequency tests - MX-5 Miata Forum
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Old 08-23-2016, 02:38 AM   #208
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Quote:
Originally Posted by 18psi View Post
I'm curious if anyone actually tested and/or knows the valve freq of the NB? Not a guess, not "this worked for me", but the real deal.

I believe we discussed this YEARS ago when setting up our very first production adaptronics, but totally forgot what we ended up with. I'll check my notes (if I still have them) when I'm bored. I know that at least one of the vendors (I believe Rev, or maybe even DIY) specifically states in their instructions NOT to ever touch the valve freq from what it's set to originally.


That's 500Hz for you sir.

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Old 08-23-2016, 10:05 AM   #209
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Boom, there it is
Thanks sir
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