Installing the EFI and need to know the best place to install the Temp sensor. I have one already in the head for my Dakota Digital temp gauge so, I have a front and rear port available on the intake. What's the best place to put it?
Temp sensor location ????
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Installing the EFI and need to know the best place to install the Temp sensor. I have one already in the head for my Dakota Digital temp gauge so, I have a front and rear port available on the intake. What's the best place to put it?
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I'm learning now that since I have the Dakota Digital gauge package there is a Dakota Digital BIM unit for the Holley EFI that integrates all the info and they talk to each other without the need for multiple sensors. This is one hell of a learning process. About ready to tow this thing to someone and tell them to call me when it's done.
1968 Camaro LS3 TH400 Moser 9” DSE mini tubs
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I’m hoping that’s not the case when I get to first start up! It is somewhat convoluted, and there are reports of some data that will not transfer through the BIM. Being sure you have the latest firmware in the BIM is one precaution.
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Then only thing i'm seeing the BIM doing for me is eliminating the need for 2 temp sensors
1968 Camaro LS3 TH400 Moser 9” DSE mini tubs
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I’m looking at it from the Dakota digital gauges display aspect.
I’d like to see all the information displayed on the gauges, and some reported having speedometer issues with the information coming from the Holley ECU, among other information.
Dakota digital does state that some information may not be transferred.
I’m getting close to fist fire up so I’ll find out soon enough.
I guess it depends on how much you want to see transferred from Holley to Dakota digital
I’d like to see all the information displayed on the gauges, and some reported having speedometer issues with the information coming from the Holley ECU, among other information.
Dakota digital does state that some information may not be transferred.
I’m getting close to fist fire up so I’ll find out soon enough.
I guess it depends on how much you want to see transferred from Holley to Dakota digital
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Keep us updated please
Frank, I'm pretty sure Matt has Dakota Digital dash and Holley Terminator EFI. Check through his build thread and maybe send him a PM.
www.camaros.net
69 rustbucket rebirth
After posting some questions in the body forum, I was encouraged to start a build thread. Here we go! Here is my unmolested original 69 SS.
www.camaros.net
Personally I would want the EFI to use its own sensor. One less thing to go wrong ? I would put it in the front of the intake. That is usually the hottest spot right before the thermostat and it also where GM put most of their sensors in late model stuff.
68 SS/RS, 468 BB TKX, SFC,3.73 Posi, Original Some kinda metallic Blue, QA1 Coil Overs/control arms.
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Couldnt you use the plug on the right head? Each head should have a plug. If I ever get to EFI, thats what I was going to use.
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I thought about it but my oil dip stick tube is in the way. I could always bend the tube some but.. i don't know. Like Don said, maybe i'm over thinking it
1968 Camaro LS3 TH400 Moser 9” DSE mini tubs
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I’m hopeful that the Holley harness, plugged into the temp sending unit will import data, to the Dakota digital, through the BIM. Then I only need one source.
It sounds like your harness isn’t long enough the way you routed it, to connect to the drivers side port on the head? or am I miss understanding something?
I’m sure Don and others are right. Any port should be fine.
I’m just looking for confirmation of displaying data through the BIM to the gauges.
It sounds like your harness isn’t long enough the way you routed it, to connect to the drivers side port on the head? or am I miss understanding something?
I’m sure Don and others are right. Any port should be fine.
I’m just looking for confirmation of displaying data through the BIM to the gauges.
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My BIM should be here today so i'll find out this weekend when I start laying out the harness and all connections.
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I have temp sensors in both heads.
ecu in the passenger, dash gauge in the drivers. I had the ecu sensor on the intake but moved it to hide the wiring a little better.
FYI
The passenger side rear reads between 10-20deg hotter than the drivers side front location, just the way the coolant circulates on a sbc.
ecu in the passenger, dash gauge in the drivers. I had the ecu sensor on the intake but moved it to hide the wiring a little better.
FYI
The passenger side rear reads between 10-20deg hotter than the drivers side front location, just the way the coolant circulates on a sbc.
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I agree the PS, rear, port is likely the hottest point in the cooling system. It is where I have my "gauge" wired to. My "light" is to the front intake manifold port
FWIW on my computer LT1 car the dash gauge is fed from PS, rear, head and the PCM (ECU) is from a sensor on the water pump which controls electric fan on/off
FWIW on my computer LT1 car the dash gauge is fed from PS, rear, head and the PCM (ECU) is from a sensor on the water pump which controls electric fan on/off
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On the efi tune the first thing would be be the cold start. It would lean out sooner. Not saying it’s good or bad.
Or if the car gets too hot or overheats for some reason using the hotter location would pull timing quicker or whatever other temp based protection you have programmed.
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Sure but to what accuracy is it needed? I’m guessing it doesn’t need to be all that accurate for the EFI. Several degrees one way or the other should make negligible difference.
Don
1968 Camaro LS3 TH400 Moser 9” DSE mini tubs
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Don has an interesting point.
The PWM fan control that Carl C was involved in designing, has a passage in the installation pdf that stated
“During testing even big brand name temperature gauges were found to be off by as much as 15degF vs. actual engine temperature. “
So it’s subjective. The placement and the accuracy could both work against the goal of accurate control.
My only interest had been stated previously.
I just thought it was an interesting point.
The PWM fan control that Carl C was involved in designing, has a passage in the installation pdf that stated
“During testing even big brand name temperature gauges were found to be off by as much as 15degF vs. actual engine temperature. “
So it’s subjective. The placement and the accuracy could both work against the goal of accurate control.
My only interest had been stated previously.
I just thought it was an interesting point.
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