[neeltburn]

The is a feature in AutoEnginuity that says Exhaust pressure in is in units of inHg (mercury) looking to use this to tune my EWG when i get it here. 1 inhg =.491 PSI from my research.


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[cntryby]

So whats your question?

BTW, you do realize the .491 PSI is in absolute pressure... right?

Also hg is used to measure low pressure... negative / vacuum.

I don't know anything about your software, but I don't see how our exhaust will be able to use hg to measure pressure.

 

[neeltburn]

My question that i worded poorly was is exhaust press. The same as drive pressure.


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[cntryby]

yes... to a point.

Drive pressure is the pressure that builds as the exhaust is forced through the turbo, exhaust manifold, tail pipe, muffler, dpf...etc.

 

[neeltburn]

I guess my question is how close would the be if In stalled a Drive press gauge? If it is close I will just use it.


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[cntryby]

just a decent quality pressure gauge should be fine.

 

[neeltburn]

Does anybody make a drive pressure gauge? or do you just use a 0-100 PSI boost gauge? I just thought that Exhaust Pressure in AE would be the same as drive pressure?

 

[cntryby]

Exhaust pressure is drive pressure... but to measure in hg is kinda backwards. I suppose it could be used but hg is typically used for measuring vacuum.

Are you sure the program wasn't referring to an intake manifold... which will have vacuum?

 

[neeltburn]

Have another that says manifold press. this clearly stated Exhaust Pressure.