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MSPNP1 94-95 and VVTuner

 
Old 06-09-2016, 11:40 PM
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Default MSPNP1 94-95 and VVTuner

I've been running a 1995 Miata trackcar for 2.5 years with the original block, 1999 head with 1995 CAS swapped in, VICS manifold and MSPNP1 94-95. The only fancy thing done to the MSPNP1 is that I am using an output to control the VICS.

Last Saturday I spun a bearing. There was a VVT engine with good compression available cheap ($700) so I picked it up and am swapping it in using Savington's excellent thread as a guide (https://www.miataturbo.net/engine-pe...athread-80469/). Seems pretty straightforward for most things.

My question has to do with the new VVTuner I purchased to control VVT. The MSPNP and OEM tach are happy with the CAS. But VVT obviously needs both a crank signal and a cam signal as it tries to control the relationship between them to position the intake camshaft. The VVTuner shows inputs for both of these as well as an "NA style" output that, I suppose, should simulate a CAS for the MSPNP and OEM tach. But when I do a search, I find a lot of people have had issues trying to use that "NA style" output with MS.

So, has anyone been able to do this without internal modifications to their VVTuner? Was this an early VVTuner issue that is now fixed? Would my easiest course be to retrofit the CAS onto the VVT head to run the MSPNP/OEM tach and then run separate wire bundles to the cam and crank sensors dedicated to the VVTuner?

Help!
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Old 06-10-2016, 01:47 AM
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Sell both
Buy MS3
???
Profit
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Old 06-10-2016, 08:37 AM
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Originally Posted by aidandj View Post
Sell both
Buy MS3
???
Profit
This is the correct answer.

If you really want to keep what you have. I would hook up the CAS and use that to run the MS. Then use the NB sensors for the VVT tuner.
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Old 06-10-2016, 09:09 AM
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Thnx guys!
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