Manifold pressure off MAP sensor?

L.W.(Bill) Hughes III did pass the time by typing:

Like this? :)

L.W.(Bill) Hughes III did pass the time by typing:

Didn't want to poke holes in the plastic and was less obvious. Added an O2 sensor to the setup a few months back. Never got around to linking it or doing the page.

Exactly what I DO NOT want. I want the gauge to read MANIFOLD PRESSURE. We are at 29.92 inches of mercury at sea level on Planet Earth. I want it calibrated in inches of mercury, NOT pounds per square inch, atmospheres, or kg/cm2. And I want it to read ambient pressure when the engine is off and lower running-on a naturally aspirated engine it will never read higher.

You would be better off posting in a weather newsgroup or a marine group. You are looking for a weather instrument, not an automotive instrument. Don't they call it a barometer?

Mike

Barometers, altimiters, and pressure gauges of all sorts are related, but they aren't necessarily interchangeable. And NO, I do not want a narometer or an altimeter. I want an absolute pressure gauge calibrated in inches mercury for hooking to a spark ignition engine's intake manifold.

Ok... Man now 'that' would be some fun interpreting any useful info from it. LOL!

Thunderstorm on the way, time to put the roof up or... did I just blow an intake gasket?

Mike

The aircraft industry has used EXACTLY what I am talking about for 70 years with perfect success. But I don't think $400 is a reasonable price.

A. I don't want to reinvent the wheel, and B, I want something that looks like it fits in an automotive panel, not a homemade looking thing.

If you know as much as you say you do, it should be easy to build it with parts from Radio Shack.

Earle

Well.... if you don't want to by aircraft parts you might try a scientific equipment supplier to find a gauge calibrated in in-hg. Call your local high school science department as ask who they use.

May we ask why use need this calibration?

A deutz is a general purpose diesel engine, not a specialized wood chipper engine. Many wood chippers have Chevy, Ford or Jeep engines-yes, Jeep engines, the old F-head, or six cylinder Continentals.

That's why you're putting a wood chipper engine in a YJ? lol

Earle

Because, one , I just want it, and two, that's how aircraft are, and three, it MAKES SENSE. It's linear, and it makes thinking in terms of BMEP easy. BMEP is what matters.

Allow me to rephrase that then. That's why you're putting a "general purpose diesel engine" into a YJ, in a country where gasoline is the normal, most readily available fuel for that application, where there already exists a specific purpose gasoline engine, adapted and tuned over decades to perform well there. lol

Earle

So, what's this gauge going to TELL you, as a driver or mechanic, that some automotive specific gauge can't?

...

It could be handy to know when that thunderstorm is heading your way. Gives you time to get the roof up....

Mike