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Working on project to make stock boost gauge accurate


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#1 tux

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Posted 03 April 2019 - 11:17 AM

I'm currently trying to build a device that takes boost pressure from a sensor and output correct signal for the stock boost gauge (tapping into the wire from ecu, but removing from ecu).

If anyone has any interest in this once the project is done I might make a couple.





#2 pcristquester

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Posted 03 April 2019 - 11:49 AM

Absolutely, great idea!
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#3 varzaman

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Posted 04 April 2019 - 08:52 PM

I am definitely interested in this.

#4 tux

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Posted 04 April 2019 - 09:25 PM

So I've managed to do a sweep.  

The easy part is do e figuring out he voltage scaling of the gauge.

Now to find a sensor and make it work quicky

https://photos.app.g...2Y79mngaVJSScB8

#5 ucw458

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Posted 04 April 2019 - 10:17 PM

Not trying to be a naysayer but I'm having trouble understanding why you would want to do this.  All factory gauges are faded and only read up to 14 psi.  Standard aftermarket 2 1/16" boost gauges are cheap and fit where the stock gauge goes.  Plus they read higher pressures than 14 psi and are accurate.
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#6 Woody

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Posted 05 April 2019 - 09:14 AM

I'm down for one when you are complete. Let me know how much and I can pay :)

ucw458, I want one to keep the original feel. I'm currently working on getting the Tacho working since changing to LS coils as well. I just want the dash to be original. I have an external boost gauge for accuracy. This is just for authenticity.
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#7 tux

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Posted 05 April 2019 - 10:14 AM

View Postucw458, on 04 April 2019 - 10:17 PM, said:

Not trying to be a naysayer but I'm having trouble understanding why you would want to do this.  All factory gauges are faded and only read up to 14 psi.  Standard aftermarket 2 1/16" boost gauges are cheap and fit where the stock gauge goes.  Plus they read higher pressures than 14 psi and are accurate.

The reason I'm doing this is to learn.  For myself, at least for now, I plan to keep boost levels at 14psi on this car.  I'll know that I'm over-boosting if I get a reading over 14.  Being that the gauge does swing well past 14.

After I get this working with a sensor, I might see about getting a different overlay made and re-adjust the scaling.

#8 varzaman

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Posted 05 April 2019 - 01:52 PM

View Postucw458, on 04 April 2019 - 10:17 PM, said:

Not trying to be a naysayer but I'm having trouble understanding why you would want to do this.  All factory gauges are faded and only read up to 14 psi.  Standard aftermarket 2 1/16" boost gauges are cheap and fit where the stock gauge goes.  Plus they read higher pressures than 14 psi and are accurate.
Because it keeps the original look!

#9 ucw458

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Posted 05 April 2019 - 04:56 PM

View Posttux, on 05 April 2019 - 10:14 AM, said:

The reason I'm doing this is to learn.  For myself, at least for now, I plan to keep boost levels at 14psi on this car.  I'll know that I'm over-boosting if I get a reading over 14.  Being that the gauge does swing well past 14.

After I get this working with a sensor, I might see about getting a different overlay made and re-adjust the scaling.

Fair enough.  Wanting to learn something is never a bad thing.  Perhaps you could look into doing what the DSM guys do with DSMlink.  They turn the stock boost gauge into a knock gauge.

To each their own.  If you guys are looking for a 100% stock look I can understand that.  I prefer the aftermarket gauge.  But that gauge makes more sense for my application.
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#10 TroyStarion

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Posted 27 April 2019 - 06:14 PM

Definitely interested in seeing this. Keep us posted!
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#11 mbruneaux

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Posted 01 May 2019 - 11:31 AM

Count me in, I have a cluster in great shape and would like to keep it looking factory.
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#12 tux

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Posted 01 May 2019 - 10:19 PM

Cool.  I've almost got it working correctly, utilizing scaling from a GM 3 bar map sensor.

I was using a sensor for a cheap Chinese gauge, but readings were very erratic.  So I had to scrap original code.

Once I'm reasonably happy with code and bench tests, I'll move it to the car, then port to a smaller/cheaper Arduino.

#13 jisleyjr

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Posted 02 May 2019 - 08:08 AM

Very cool idea and can't wait to see your progress.
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#14 kev

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Posted 02 May 2019 - 11:19 AM

Cool!

Personally I love the idea above about turning it into a knock gauge.

#15 Woody

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Posted 03 May 2019 - 08:05 AM

Arduino's are awesome. I can't wait.
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#16 tux

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Posted 08 August 2019 - 10:05 AM

OK!  So sorry for a lack of update here since there was a little bit of interest, I figured I'd update :)

Got busy with some other things, but I've decided to change it up a bit.  I will be using a GM 3 bar map instead of a gauge boost sensor as it is cheaper.  

I've also decided to make new gauge faces that will read up to 25 PSI but still look identical the original.  Those are mocked up and given to a friend to finalize.  Once she has them finalized for me, I'll "rescale" for accuracy.

#17 tux

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Posted 08 August 2019 - 10:23 AM

I'm doing a tacho mod as well as boost gauge, but tacho is just for fun since it was easiest to do

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#18 pcristquester

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Posted 08 August 2019 - 02:58 PM

Nice, thanks for the update
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#19 mbruneaux

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Posted 09 August 2019 - 06:52 AM

Looking forward to the product!
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#20 Woody

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Posted 03 September 2019 - 04:22 AM

Would also love to know about the Tacho :)
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