Dashlogic
Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15
The ECM doesn't have access to this info. You'd have to add an external sensor. In that case you have to setup the formulas to convert 0-5V to temps anyways, so just set one up for F and one up for C. Same as setting up a wideband.
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Joined: Feb 2017
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No need external sensor for EGT on the C6 ZR1. I've got EGT (bank 1 and 2) with just obd2 adaptator and torque app.
I think you just need to add the EGT pid to dashcontrol unit.
I think you just need to add the EGT pid to dashcontrol unit.
Last edited by rodolf911; Apr 10, 2017 at 10:12 AM.
Le Mans Master
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Sorry for the hijack, but I want to monitor fuel pressure via Dashlogic and was wondering what sensor and other hardware I needed to do that? I'm thinking all I should need is a sensor with a module that puts out a 0-5v analog signal and plug that into the Dashlogic, like with the PLX SMR output. Am I correct on that?
I've been looking online for some kind of kit, but can't seem to find exactly what I need.
I've been looking online for some kind of kit, but can't seem to find exactly what I need.
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Sorry for the hijack, but I want to monitor fuel pressure via Dashlogic and was wondering what sensor and other hardware I needed to do that? I'm thinking all I should need is a sensor with a module that puts out a 0-5v analog signal and plug that into the Dashlogic, like with the PLX SMR output. Am I correct on that?
I've been looking online for some kind of kit, but can't seem to find exactly what I need.
I've been looking online for some kind of kit, but can't seem to find exactly what I need.
Basically you just need a pressure sensor with a linear 0-5V output that is in the ballpark range you'd need for fuel pressure. If you can let me know what your fuel system looks like now I can point you in the right direction (mainly which rails you're using). Honeywell makes a ton of sensors with all kinds of ranges and adapters, etc. to fit about anything so that is what I've been using for fuel and alky control pressure. I've never had one fail, even when used with methanol
Basically it ends up being 3 wires to the sensor: 5V+ (can pull from a coil or the MAP sensor), ground and a 0-5V ouptut which goes to dash logic, then you have to setup dash logic so it knows what to do with that 0-5V signal and presto wammo, fuel pressure reading
Last edited by schpenxel; Apr 10, 2017 at 10:20 AM.
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Joined: Feb 2017
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Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15
Contact dash logic support. They might be willing to add support for those but that would be the only way. There is no way for you to add it.
But they are absolutely 100% estimates. There is no sensor on any C6 capable of measuring exhaust gas temp from the factory. It uses things like commanded AFR, throttle, RPM, etc. to estimate it. Presumably GM built a model that estimates them based off of real data they collected in a lab somewhere. Maybe it's right, maybe it's not, I don't know.
GM uses similar logic for quite a few things. Intake valve temp, manifold air temp (on non ZR1 models), even engine oil temp for base models is estimated and not a real reading
I assure you it's an estimate, not a real measured value. I've never compared it to an actual EGT reading so I don't know how accurate it is.
But they are absolutely 100% estimates. There is no sensor on any C6 capable of measuring exhaust gas temp from the factory. It uses things like commanded AFR, throttle, RPM, etc. to estimate it. Presumably GM built a model that estimates them based off of real data they collected in a lab somewhere. Maybe it's right, maybe it's not, I don't know.
GM uses similar logic for quite a few things. Intake valve temp, manifold air temp (on non ZR1 models), even engine oil temp for base models is estimated and not a real reading
I assure you it's an estimate, not a real measured value. I've never compared it to an actual EGT reading so I don't know how accurate it is.
Last edited by schpenxel; Apr 10, 2017 at 10:30 AM.
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From: Raleigh, NC
St. Jude Donor '15
It's probably in the ballpark for a stock car. I doubt it is on modified ones though (not sure if yours is stock or not)
I thought it was a real reading too in the beginning
I thought it was a real reading too in the beginning
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Joined: Feb 2017
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Yes 26 deg timing advance is the stock value for ZR1, it's was before my stage 1 (2.6 pulley, ar headers, tuning...)
Now i've got same EGT values and max timing 18 deg. But i would like to have EGT values with my dashlogic unit...
Now i've got same EGT values and max timing 18 deg. But i would like to have EGT values with my dashlogic unit...
Last edited by rodolf911; Apr 10, 2017 at 10:58 AM.
Race Director
Joined: May 2004
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From: Raleigh, NC
St. Jude Donor '15
Same EGT's with stage 1/less timing makes me think it's probably not right for your setup. There's not anything that can be changed tune wise to adjust it though so not much you can do.
Maybe DL will be able to add it for you so you can at least see it that way
If you truly want to monitor EGT I'd consider adding a sensor for it
Maybe DL will be able to add it for you so you can at least see it that way
If you truly want to monitor EGT I'd consider adding a sensor for it
Last edited by schpenxel; Apr 10, 2017 at 11:19 AM.
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).You would need something like this:
https://www.plxdevices.com/ProductDe...e=897346002184
Le Mans Master
Joined: Apr 2013
Posts: 5,376
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What you're seeing there is an estimate, not an actual reading.
What fuel rails are you running again Sammy?
Basically you just need a pressure sensor with a linear 0-5V output that is in the ballpark range you'd need for fuel pressure. If you can let me know what your fuel system looks like now I can point you in the right direction (mainly which rails you're using). Honeywell makes a ton of sensors with all kinds of ranges and adapters, etc. to fit about anything so that is what I've been using for fuel and alky control pressure. I've never had one fail, even when used with methanol
Basically it ends up being 3 wires to the sensor: 5V+ (can pull from a coil or the MAP sensor), ground and a 0-5V ouptut which goes to dash logic, then you have to setup dash logic so it knows what to do with that 0-5V signal and presto wammo, fuel pressure reading
What fuel rails are you running again Sammy?
Basically you just need a pressure sensor with a linear 0-5V output that is in the ballpark range you'd need for fuel pressure. If you can let me know what your fuel system looks like now I can point you in the right direction (mainly which rails you're using). Honeywell makes a ton of sensors with all kinds of ranges and adapters, etc. to fit about anything so that is what I've been using for fuel and alky control pressure. I've never had one fail, even when used with methanol
Basically it ends up being 3 wires to the sensor: 5V+ (can pull from a coil or the MAP sensor), ground and a 0-5V ouptut which goes to dash logic, then you have to setup dash logic so it knows what to do with that 0-5V signal and presto wammo, fuel pressure reading
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
I'm running the stock Magunson Heartbeat / LS9 fuel rail. I'm thinking of running the fuel supply line from the ECS stage 1 fuel system up front and use their snap lock connector to tee into the rail up front, instead of at the rear. That tee connector has a 1/8"NPT orifice that comes plugged, so that would be the perfect place to monitor fuel pressure from. That, or the fuel rail test port. So, I would need the pressure sensor and a module to translate the pressure signal into something that the Dashlogic would read, correct? BTW: I note that PLX does not recommend that their fluid pressure module be used for fuel, so I would need something else.
Basically you'd unplug the braided line that connects to the fuel rail, push this on to the fuel rail, then push the fuel line on to this. I probably have a picture of mine around here somewhere.
This: https://www.summitracing.com/parts/n...qeuhoCOw_w_wcB
Pressure sensor wise, no, you don't have to have any kind of box to translate anything (well, depending on which sending unit you use..). The pressure sensor I'd recommend you use (and I use) has an output that can plug directly into dash logic without anything special inbetween. Just wire
Last edited by schpenxel; Apr 10, 2017 at 02:17 PM.
