Have any of you guys spent any time trying different areas inside the plenum for a MAP sensor reading? Being that we are all retrofit and no pressure sensor it has me wondering how much the location of the vac source changes the output to the MAP front to back of plenum.

Cheers,
Matt

 

Never had the need to do this. What exactly is the problem you're experiencing

 

Non-Miata related question. Just a general question. Im building an intake manifold for my personal car. (small photo below of concept)

Wondering where I can get the most stable yet proper representation of MAP or if its a non-concern. The sensor I'm using is a tMap though so I am pretty limited on where to put it (pretty much right behind the throttle body would be the best temperature reading)

Photo

 

The OEM map sensor in these cars is plumbed after tb but before runners

 

This engine did not have a MAP

 

Looks similar to the way alot of custom BMW guys build manifolds.

I'd be more concerned about equal flow to all runners, years ago on R3V someone was building proto's like this, and his simulation software was showing it hard to get a good balance.

 

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The pipe half was just sitting on the bottom, not how it will look in finished trim.

 

If it's worth anything to you, I ran an external AEM Map sensor to a small port behind the throttle body, before the runners with nipples that looked like they'd normally be purposed to the FPR or Cruise Control. This is on a square top. As I recall, it's around the same area that the Megasquirt manuals would recommend running a loooooooong skinny line to.