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Old 06-05-2018, 04:33 PM   #1
PDXREALTOR
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Default Boost Gauge For Bigger Boost Applications

I would like a gauge so I don't have to waste an ap spot to monitor boost.

What gauges accurately match the factory ecu reading?

And, where is a good location to tap the pressure source?

I currently have an AEM gauge that is total crap both in vacuum and boost. I've tapped at the manifold fpr location, and off the Bpv both without success so it's got to be the gauge.
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Old 06-05-2018, 05:21 PM   #2
JonnyWachter
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We have a variety of options available, extremely accurate transducer 5v powered sender, lifetime warranty on the electronics and sender, 100% made here in the USA and fully customizable.
https://www.speedhut.com/gauges/Boos...6&search=boost
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Old 06-05-2018, 05:32 PM   #3
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Have any experience with this one? https://www.speedhut.com/gauge/GR-DG...E2%84%A2-Bezel)

It seems to use the same sensor as the AEM I have now. Certainly uses the same plug on the sensor end.
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Old 06-05-2018, 05:44 PM   #4
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There's a lot of sensors on the market that look very similar, the Delphi connector is an extremely common plug for sensor applications. I have had the same sensor in my STI for two years now. Works flawless and is accurate to the reading I get on my Accessport.
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Old 06-05-2018, 05:47 PM   #5
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Where did you tap the pressure source?
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Old 06-05-2018, 05:48 PM   #6
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The common BPV line
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Old 06-05-2018, 05:49 PM   #7
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Does your vacuum match the ecu/ap?
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Old 06-05-2018, 05:51 PM   #8
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Can I use my current harness with your gauge/Sender?
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Old 06-05-2018, 06:55 PM   #9
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Does it hold max recall and if so is there an easy reset? I couldn't find the info on your site
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Old 06-06-2018, 01:04 AM   #10
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Always tap your pressure source right from the manifold,

We use a AEM boost gauge 5 bar, and a link ecu 5 bar for the ecu map. both sensors match within .1 of eachother all the time.
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Old 06-06-2018, 01:13 AM   #11
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Thx. I have tried the bpv/fpr line and also directly off the manifold where the oem fpr source nipple is. Neither with success.
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Old 06-06-2018, 10:44 AM   #12
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Default Boost Gauge For Bigger Boost Applications

directly off the manifold is how you measure atmospheric pressure entering the engine. reading it from that position is the best location.

if it does not match your ecu reading then either your ecu is reading wrong or your gauge is broken/installed incorrectly.
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Old 06-06-2018, 01:16 PM   #13
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Quote:
Originally Posted by Titter View Post
directly off the manifold is how you measure atmospheric pressure entering the engine. reading it from that position is the best location.

if it does not match your ecu reading then either your ecu is reading wrong or your gauge is broken/installed incorrectly.
Yes, I figured it can't be wrong if being read off the manifold, hence the reason I sent back the gauge to AEM for repair. They said it checked out within spec but that's not possible based on the multiple locations I've hooked the pressure sensor to.

Vacuum is off by double the ecu reading. It is in the low 20s, and we all know the vacuum at idle is not that high.

I'm hesitant to try another aem gauge, as they likely all use the same sensor.
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Old 06-06-2018, 02:22 PM   #14
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Quote:
Originally Posted by PDXREALTOR View Post
Does your vacuum match the ecu/ap?
Quote:
Originally Posted by PDXREALTOR View Post
Can I use my current harness with your gauge/Sender?
Quote:
Originally Posted by PDXREALTOR View Post
Does it hold max recall and if so is there an easy reset? I couldn't find the info on your site
Hard to say when considering my AP reads in -PSI which doesn't make sense.

You cannot use your current AEM harness with our gauge.

It holds max recall for both boost and vac, you just hold down the button at any time when the gauge is powered up and it will swing to the max the gauge has ever seen unless reset.
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Old 06-06-2018, 02:32 PM   #15
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Quote:
Originally Posted by JonnyWachter View Post
Hard to say when considering my AP reads in -PSI which doesn't make sense.

You cannot use your current AEM harness with our gauge.

It holds max recall for both boost and vac, you just hold down the button at any time when the gauge is powered up and it will swing to the max the gauge has ever seen unless reset.
I meant, does your vacuum in - psi match your ap

I could use the wires from my harness and just swap out plugs, correct?
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Old 06-06-2018, 02:47 PM   #16
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The vacuum numbers do match up with the ap.

I cant say that it's doable, doing so COULD void the warranty.
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Old 06-06-2018, 03:14 PM   #17
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Quote:
Originally Posted by PDXREALTOR View Post
Vacuum is off by double the ecu reading. It is in the low 20s, and we all know the vacuum at idle is not that high.
low 20's of what?

That makes perfect sense if it's inHg
psi not so much, but most gauges are inHg, so if they are testing it and saying it's within spec they might be right
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Old 06-06-2018, 03:54 PM   #18
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Idle for my car is around 18 inHg but reads (-)8.8 PSI on my AP.
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Old 06-06-2018, 11:13 PM   #19
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Man I feel dumb. I swear the oem dash gauge said inhg..... The aem gauge is in fact inhg

In any event the aem gauge is still off in psi and it's more than a little off.

I suppose confirmation that the manifold or Bpv locations are providing others with accurate reading is enough to confirm the aem sender is off, and aem version of in spec is sloppy.
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Old 06-07-2018, 01:36 PM   #20
JonnyWachter
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I have tried other locations to get the sender closer to the main wiring harness but have found the most accurate reading off the BPV. I actually have a vacuum line from the T at the BPV running under my intake all the way over to under the upper coolant res where I then have my sensor and it works fine.
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Old 06-07-2018, 01:38 PM   #21
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Quote:
Originally Posted by JonnyWachter View Post
I have tried other locations to get the sender closer to the main wiring harness but have found the most accurate reading off the BPV. I actually have a vacuum line from the T at the BPV running under my intake all the way over to under the upper coolant res where I then have my sensor and it works fine.
It makes sense that the most accurate would be the bpv or manifold as the fpr reference is ran off both locations.

Anyone try the innovate boost and afr combo gauge?

https://www.innovatemotorsports.com/products/psb1.php
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Old 06-08-2018, 07:27 AM   #22
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i have prosport evo gauges. all of them are bang on accurate.
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Old 06-08-2018, 08:10 PM   #23
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Quote:
Originally Posted by Titter View Post
i have prosport evo gauges. all of them are bang on accurate.
Almost bought some of those, but ended up with the AEM to match my wb02.

I have an innovate oil temp/pressure gauge also. I really like the boost gauge and wb02 gauge being combined in one, but I don't know if it's possible to convert the wb02 data from the gauge to the AP like is done with the AEM uego
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Old 07-27-2018, 01:23 AM   #24
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Ok guys.... Need some help. I have now have the Innovate psb-1, and it has a 4 bar map sensor.

I also hooked up fuel pressure logging, and re-did the reference line off the manifold for both boost and fpr.

I'm still way off when compared to my access port (MA sensor).

Are your guys' peak boost numbers matching the peak boost of the access port?
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Old 07-27-2018, 07:26 AM   #25
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So your gauge is reading mechanically right? Off a hose?

keep in mind you are measuring pressure of something compressible, not oil, so head loss and flow restrictions will lag a reading. Peak numbers are exactly where that lag will be seen, technically it will never 'get there' if you have a long small diameter line feeding it and you hit a peak that immediately drops down. A sustained pressure will get there, but peaks that drop off won't.

The AP is probably getting its reading from an electronic sensor at an ideal spot, so there's no reading lag and a peak jump will be seen and transmitted instantly.
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