How accurate is the stock boost guage?(but a little more in depth...) - Ford Powerstroke Diesel Forum
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post #1 of 30 Old 06-25-2010, 07:28 AM Thread Starter
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How accurate is the stock boost guage?(but a little more in depth...)

I'm curious as to the accuaracy of the stock boost guage on my 05'. Keeping it under a 70mph run it runs up to about 25-28psi, but if I run it from a dead stop up to the speed limiter it will touch 30psi by about 75-80mph - I don't really see this happening for a stock (as far as I know...) truck. I'm assuming the stock guage reads from the MAP sensor?

-Matt

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post #2 of 30 Old 06-25-2010, 11:01 AM
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They are really quite accurate. That is right where your boost should be.
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post #3 of 30 Old 06-25-2010, 12:40 PM Thread Starter
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They are really quite accurate. That is right where your boost should be.
I just wanted to make sure. I got a nasty face from (you know who you are) when I told him it'd hit 30psi.

Thanks for the info Green, I appreicate it.
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post #4 of 30 Old 06-25-2010, 12:52 PM
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I found my to be very accurate just not as responsive as my auto-meter. if that helps, For instance when i play with the pedel i can watch my auto-meter jump, as where the stock will not move witht the pedel. Lol if that makes sence.


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post #5 of 30 Old 06-25-2010, 12:56 PM Thread Starter
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Yeah it makes perfect sense. The aftermarket guage in my dads 00' is alot more responsive than my stocker, but then again I don't know where my truck is taking the reading from. The stock map sensor in my 05' may be slower to respond than whatever kind of sensor is used for an aftermarket guage; I'd think they'd be the exact same type of sensor though.

-Matt
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post #6 of 30 Old 06-25-2010, 12:58 PM
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not necisarily. if its reading it fromt he MAP then its an electrical gauge, electrical gauges respond alot slower than mechanical. pops 7.3 gauge is mechanical and is Td into the line that the MAP snsor gets its reading from. ur gauge is most likely a hijacked signal form the MAP.

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post #7 of 30 Old 06-25-2010, 01:06 PM Thread Starter
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^^^ I was hoping you'd see this...

I don't know if mine is elec. or not, but it would seem logical that since there is a MAP sensor on my truck, and the computer obviously needs a boost reference for fueling, that my guage would be electrical. The computer would need to read from an electrical sensor (which would be the MAP sensor) I'd think, so my guage must read from that too...

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post #8 of 30 Old 06-25-2010, 01:46 PM
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Factory 05 up boost gauge is right on the money

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post #9 of 30 Old 06-25-2010, 02:09 PM Thread Starter
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Factory 05 up boost gauge is right on the money
10-4
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post #10 of 30 Old 06-28-2010, 06:48 AM
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If the factory boost gauge is so accurate then how come people get aftermarket boost gauges? Obviously this is only in reference to '05+ trucks.

I've been itching to ask this for a long time...just didn't want to show how green I was

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