1G Electronic Boost Data Logging

[Blue94VR4]

Did the install and drove around for 5 minutes. CEL did not come yet. I'll do more driving tomorrow, will see.

However, I do not get correct readings if I choose 2.5 or 3 bar sensor. My Autometer gauge shows 8psi. If I choose 3 bar sensor setting, I get 17psi, if I choose 2.5 bar - I get 12psi. This suggests my sensor is 2 bar, which is consistent with the reply I've got from Autometer tech support. Unfortunately, my hybrid logger does not have 2 bar setting. I've contacted Chris already about this. I hope he'll be able to help me out.

Thanks

[BLACK94TT]

Originally Posted by Blue94VR4

Did the install and drove around for 5 minutes. CEL did not come yet. I'll do more driving tomorrow, will see.

However, I do not get correct readings if I choose 2.5 or 3 bar sensor. My Autometer gauge shows 8psi. If I choose 3 bar sensor setting, I get 17psi, if I choose 2.5 bar - I get 12psi. This suggests my sensor is 2 bar, which is consistent with the reply I've got from Autometer tech support. Unfortunately, my hybrid logger does not have 2 bar setting. I've contacted Chris already about this. I hope he'll be able to help me out.

Thanks

FWIW, I've got the full sweep autometer fp gauge and I'm using the 3bar setting.

[cbatters]

Originally Posted by Blue94VR4

Did the install and drove around for 5 minutes. CEL did not come yet. I'll do more driving tomorrow, will see.

However, I do not get correct readings if I choose 2.5 or 3 bar sensor. My Autometer gauge shows 8psi. If I choose 3 bar sensor setting, I get 17psi, if I choose 2.5 bar - I get 12psi. This suggests my sensor is 2 bar, which is consistent with the reply I've got from Autometer tech support. Unfortunately, my hybrid logger does not have 2 bar setting. I've contacted Chris already about this. I hope he'll be able to help me out.

Thanks

I went back and checked my earlier math. With engine off you were reporting 2.2V which is approximately 112 ADC counts.

2.5 BAR
BAR = (ADC * 0.0098039) +.1
PSI = (ADC * 0.142193511) - 13.0534

2.0 BAR
BAR = (ADC * 0.0078431) +.1
PSI = (ADC * 0.113755059) - 13.0534

2.5 bar sensor would put you about 5700' below sea level and the 2 bar would put you about 500' above sea level. So either your car was in a mile deep mine or you are at ~500' elevation (or you live closer to sea level and the weather was really awful!)



Clint

[Blue94VR4]

Clint,
I am above see level So I guess it's 2 bar for me.

Steve,
I think you are using different Autometer gauge. Mine is vacuum/boost w/ max boost of 15psi. I think yours has max boost of 30psi, right? I've contacted Autometer and they confirmed I have 2 bar sensor.

Well, I guess I'll have to wait for Shiver to include 2 bar sensor.

Thanks guys,
Sergey

PS. No CEL so far. Resistor has been removed.

[cbatters]

Originally Posted by Blue94VR4

Clint,
I am above see level So I guess it's 2 bar for me.

Steve,
I think you are using different Autometer gauge. Mine is vacuum/boost w/ max boost of 15psi. I think yours has max boost of 30psi, right? I've contacted Autometer and they confirmed I have 2 bar sensor.

Well, I guess I'll have to wait for Shiver to include 2 bar sensor.

Thanks guys,
Sergey

PS. No CEL so far. Resistor has been removed.

Pittsbug, PA Elevation - 750'

Add a few clouds and your MAP sensor is spot on.

Great info about the CEL. I didn't know if people that had removed EGR could get away with using the EGRT input for boost logging without tripping a CEL.


Clint

[BLACK94TT]

Originally Posted by Blue94VR4

Clint,
I am above see level So I guess it's 2 bar for me.

Steve,
I think you are using different Autometer gauge. Mine is vacuum/boost w/ max boost of 15psi. I think yours has max boost of 30psi, right? I've contacted Autometer and they confirmed I have 2 bar sensor.

Well, I guess I'll have to wait for Shiver to include 2 bar sensor.

Thanks guys,
Sergey

PS. No CEL so far. Resistor has been removed.

Yep, 30 psi boost max.

[Blue94VR4]

Clint,

I'll let you know if CEL comes up.
Thanks,
Sergey

[badass3000]

Originally Posted by cbatters

AUTOMETER BOOST GAGE
If you have an AutoMeter Boost gage you already have a GM 3.0 BAR MAP sensor installed. All you have to do is connect the signal wire from the MAP sensor to the EGRT input on A22. (Only connect the signal line, not the ground.)

where???

[skunkworks]

that is a machanical guage - autometer must also make a electronic boost guage - that is what clint is talking about.

Originally Posted by badass3000

where???

[badass3000]

okay, from the looks of it this was going to be a simple trick. I have a Greddy guage MAP sensor right neer the EGRT plug.
so three wires from MAP sensor (red, black, and white) I chose white and wired it to the light green with black stripe EGRT wire. configed the MMCd for 3 bar but I get a constant 113 from the BOST line.
what did I do wrong?