Thread: 350 sbc Year

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Originally Posted by techinspector1

Hmmmm, what if the sensor in the water pump switch is set to fire the fan(s) at 150 (190 at the heads)
I don't know Jerry, I'm just tryin' to think out of the box.....

Pretty sure mine has three coolant temp sensors, all "transducers", no "switches". One at the front of a head for dedicated input to the EFI PCM, one on the thermostat neck that's the dedicated input to the SPAL programmable fan controller, and one on the intake that feeds my dash indicator. I set the trigger points on the fans by watching the PCM temp readout, which is hottest, and I know that my dash indicator shows the average coolant temp, about 15F below the head outlet.

Zippi, I hope you got your engine ID figured out, since that's the question you brought.

Originally Posted by rspears

Zippi, I hope you got your engine ID figured out, since that's the question you brought.

Yeah, I'd like to know too....

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My 37 is currently in to have all the upholstery redone. I'll have to wait to check the numbers when I get it back in late May. To far away to go look. Ok guys I'm listening, where would be the optimal place to put the sender for the dash gage and the electric fan?

The one by the water pump is completely out of sync with the control of anything---------It would only be useful to determine how effective the radiator was (rad out, engine in) when compared to reading from the one by the thermostat. This can be useful info-----However to use it to control electric fan is total loser

Water temp should be judged at highest temp location, fan control from an same area-----like top of intake and or thermostat housing. That water pump fitting is for an return from heater core hose. The location of a fan sensor in the coolest part of the system will be inaccurate, and any relays/switches that are connected to it will be in reverse pattern to normal system --------

However---------you could make it work if you used some switches/relays set up around ambient air temps to run fans when water was a few degrees above that. It just isn't the most effient/logical way to do it--

Here is a pic off my block in the front. Can't seem to find anything out on the links provided. Looks like VO 15 RG. Need a little help here guys.

Found it
1971, made in Flint MI, 02/15/71, 255 hp,

Yep, TBG is only one model
1971 CK10 and 20 truck with 4bbl carb and turbo 350 tranny LS-9 255 hp