Water temperature sensor: How to tap and install
#26
RX-7 Bad Ass
iTrader: (55)
The only downside with the throttle body line is if you use a 1-wire temp sender that grounds through whatever it screws into. You can add a ground wire to the brass T and ground it, though.
This is a good option if you have the water pump housing off already and want to do it. The thermostat housing is still dumb any which way you look at it.
Also, I'm just not keen on 1-wire temp sensors, that's just a lazy design.
Dale
This is a good option if you have the water pump housing off already and want to do it. The thermostat housing is still dumb any which way you look at it.
Also, I'm just not keen on 1-wire temp sensors, that's just a lazy design.
Dale
#28
Urban Combat Vet
iTrader: (16)
The only downside with the throttle body line is if you use a 1-wire temp sender that grounds through whatever it screws into. You can add a ground wire to the brass T and ground it, though.
This is a good option if you have the water pump housing off already and want to do it. The thermostat housing is still dumb any which way you look at it.
Also, I'm just not keen on 1-wire temp sensors, that's just a lazy design.
Dale
This is a good option if you have the water pump housing off already and want to do it. The thermostat housing is still dumb any which way you look at it.
Also, I'm just not keen on 1-wire temp sensors, that's just a lazy design.
Dale
#29
Cheap Bastard
iTrader: (2)
From this diagram, it looks like the coolant flows in the upper drivers side of the engine, and out the lower passenger side. It appears that the coolant to the throttle body coolant line escapes the engine before being completely heated by the passenger side of the engine.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
#30
Make an assessment...
iTrader: (3)
The only downside with the throttle body line is if you use a 1-wire temp sender that grounds through whatever it screws into. You can add a ground wire to the brass T and ground it, though.
This is a good option if you have the water pump housing off already and want to do it. The thermostat housing is still dumb any which way you look at it.
Also, I'm just not keen on 1-wire temp sensors, that's just a lazy design.
Dale
This is a good option if you have the water pump housing off already and want to do it. The thermostat housing is still dumb any which way you look at it.
Also, I'm just not keen on 1-wire temp sensors, that's just a lazy design.
Dale
Thanks!
From this diagram, it looks like the coolant flows in the upper drivers side of the engine, and out the lower passenger side. It appears that the coolant to the throttle body coolant line escapes the engine before being completely heated by the passenger side of the engine.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
#31
Urban Combat Vet
iTrader: (16)
From this diagram, it looks like the coolant flows in the upper drivers side of the engine, and out the lower passenger side. It appears that the coolant to the throttle body coolant line escapes the engine before being completely heated by the passenger side of the engine.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
I bypassed the T-body some years back but still use the line for my gauge sensor. Your experience is opposite of mine. The gauge is consistently in complete agreement with the PFC. If anything the gauge (DEFI 'D' Series) reacts a hair quicker.
#32
Cheap Bastard
iTrader: (2)
It flows to the throttle-body coolant line right after passing BOTH combustion chambers. It just doesn't pass through the exhaust side of the housings.
I bypassed the T-body some years back but still use the line for my gauge sensor. Your experience is opposite of mine. The gauge is consistently in complete agreement with the PFC. If anything the gauge (DEFI 'D' Series) reacts a hair quicker.
I bypassed the T-body some years back but still use the line for my gauge sensor. Your experience is opposite of mine. The gauge is consistently in complete agreement with the PFC. If anything the gauge (DEFI 'D' Series) reacts a hair quicker.
Glad your temps correspond. Mine don't. The exhaust is the hottest portion of a rotary engine. It seems to me that the coolant would be heated even more on the exhaust side.
Adam
#33
temp sender location
Since we are replacing our factory W/T gauge with something more accurate can I just use the location of the factory sending unit and screw in the new sending unit there?
Joe
Joe
#34
Make an assessment...
iTrader: (3)
Depends on the thread pitch. I think the stock one is M10x1.0 and sensors tend to be 1/8NPT. But you can use this...
https://www.pegasusautoracing.com/pr...asp?RecID=1832
https://www.pegasusautoracing.com/pr...asp?RecID=1832
#35
Rotary Freak
iTrader: (14)
From this diagram, it looks like the coolant flows in the upper drivers side of the engine, and out the lower passenger side. It appears that the coolant to the throttle body coolant line escapes the engine before being completely heated by the passenger side of the engine.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
If I am seeing this correctly, this would explain why my TB coolant line sensor is always several degrees cooler then my PFC reading.
#36
Urban Combat Vet
iTrader: (16)
Are we sure the exhaust side is hotter than the combustion side? I ask because I've always seen the modifications for cooling done on the plug side of the housings, not on the exhaust side. And after the combustion event, which side of the housing (referring to the diagram) has the most prolonged contact with the hot exhaust gases?
Intuitively I think it should be the exhaust side, and certainly it's last on the coolant flow, but....
Intuitively I think it should be the exhaust side, and certainly it's last on the coolant flow, but....
#38
Water Temp gauge
I have been reading this thread and no one mentions installing the new temp sender in the old temp sender location. Since we are not using the old gauge why isn't this the easy way to accomplish hooking up the new gauge?
Joe
Joe
#39
Make an assessment...
iTrader: (3)
I'm still using my stock gauge as well. I don't look at it as much as the aftermarket one, but in case that one fails I can at least see something with the stock one, even though it's not great. That's why I ended up choosing not to put it there. I had thought about it though.
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befarrer
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08-22-15 05:52 PM