Vacuum display in dash?

sbrenskell · Jan 27, 2018

My dad and I can't figure out what the Vacuum display is for. I know it's for track use. But what's the purpose?

it's the one nearest the passenger..

highvoltage · Jan 27, 2018

Honestly i think it’s a ode to the mustangs of the early years. At least that’s what i heard. In a 5.0 it doesn’t serve much of a purpose. I’m tempted to swap it for a digital gauge of some sort.

hiccup · Jan 27, 2018

The vacuum guage is an aide in helping the driver achieve optimum fuel economy. There is certain rpm levels at load which require less fuel... ..uh I think

sbrenskell · Jan 28, 2018

So basically it doesn't do anything useful?

Dub347sbf · Jan 28, 2018

sbrenskell said:
So basically it doesn't do anything useful?

It can help with diagnostics to see if there is a problem...if you know for sure you typically pull X vacuum at X speed in X gear, and suddenly you are pulling less, you know something might be wrong. Or you have a huge head wind.

TruBlu16GT · Jan 28, 2018

Back in the day, Vacuum Gauges were to monitor fuel economy. The thought was the higher the vacuum, the leaner the fuel mixture; therefore, better economy.

But those were mechanical gauges that reacted to even the slightest change in throttle.

The Mustang dash gauges are fed information from the computer and there is a significant lag.

So, at this point, it's really just another whizz-bang Gee-Gaw to fill a hole in the dash. I suppose on the Turbo cars, it's a little more useful with the Boost information.

The GT's should've got an Oil Temp gauge there if you ask me as the dash vac gauge is made redundant by the digital one in the gauge cluster. But then again, so would the Oil Temp idea.

sbrenskell · Jan 28, 2018

TruBlu16GT said:
Back in the day, Vacuum Gauges were to monitor fuel economy. The thought was the higher the vacuum, the leaner the fuel mixture; therefore, better economy.

But those were mechanical gauges that reacted to even the slightest change in throttle.

The Mustang dash gauges are fed information from the computer and there is a significant lag.

So, at this point, it's really just another whizz-bang Gee-Gaw to fill a hole in the dash. I suppose on the Turbo cars, it's a little more useful with the Boost information.

The GT's should've got an Oil Temp gauge there if you ask me as the dash vac gauge is made redundant by the digital one in the gauge cluster. But then again, so would the Oil Temp idea.

I might eventually change it out to something else. But I like the look of it because it changes colors with everything else. So who knows. Right now I just want my car back from getting Ceramic Coated!

HoosierDaddy · Jan 28, 2018

TruBlu16GT said:
The GT's should've got an Oil Temp gauge there

Totally agree.

For anyone wanting to do that: Its possible to get an oil temp by swapping in GT350 gauges. Its just plug and play since all gauge info is on the CAN bus. Some differences would be (1) GT350 gauges don't have MyColor so always white lit, (2) apparently the oil temp in GTs is inferred from other data because there is no actual oil temp sensor in the car. But Ford has been doing that for oil temp gauges for at least 16 years because my 2002 SVT is that way.

HeelToeHero · Jan 28, 2018

You can swap it out with the gt350 gauges (oil temp and pressure) but you will loose my colour on those gauges if you have that option.

JohnD · Jan 28, 2018

Basically, it's a pretty useless gauge filling a hole that should have had an oil temp gauge in it, at least in the PP cars. One more bad decision by Ford on these cars.

airfuel · Jan 28, 2018

Not useless at all.
Quick google and you can read for days.

http://www.onallcylinders.com/2015/...d-a-vacuum-gauge-to-pinpoint-engine-problems/

hlh1 · Jan 28, 2018

Does it allow any positive numbers? I have a vacuum/boost gauge on my 95 and it's fun to watch when the Vortech starts pushing positive numbers...

HoosierDaddy · Jan 28, 2018

hlh1 said:
Does it allow any positive numbers? I have a vacuum/boost gauge on my 95 and it's fun to watch when the Vortech starts pushing positive numbers...

GT PP gauges don't, but you can swap in the equivalent EcoBoost gauges if you want vacuum/boost.

Madtel4 · Jan 28, 2018

sbrenskell said:
So basically it doesn't do anything useful?

Madtel4 · Jan 28, 2018

airfuel said:
Not useless at all.
Quick google and you can read for days.

http://www.onallcylinders.com/2015/...d-a-vacuum-gauge-to-pinpoint-engine-problems/

As useful as a dwell meter is today. Very old school and out of date.
Lee

Vacuum display in dash?

sbrenskell

Waiting for OF

highvoltage

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hiccup

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sbrenskell

Waiting for OF

Dub347sbf

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TruBlu16GT

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sbrenskell

Waiting for OF

HoosierDaddy

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HeelToeHero

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JohnD

Legend in his own mind

airfuel

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hlh1

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HoosierDaddy

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Madtel4

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Madtel4

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