Ohm readings for stock 40 guage?

[toyondarox]

I have a 75 fj40 with a sm420 and 400 sbc, and for the life of me I cannot find the ohm resistance for the stock temperature guage in the dash!! Does anyone know this information? I have tried the search feature and Google. and have not found anything. Any help would be appreciated. Also if anyone has the part number for the 350/400 sbc temp sensor that will work with the stock 40 guages.

 

[65swb45]

Try the FAQ section. BTW, how, and more importantly WHY did you put the stock Toyota fan on the front of that SBC? And the Toyota alt pulley on the GM alt? That's just wrong.

 

[toyondarox]

As stated above I have searched this forum. And the stock toyota fan moves alotta air and keeps my 400 cool so why change something that works. Also that is a completely stock gm alternator out of a junkyard. I'm not into restoring this thing. I'm building a crawler. I have stretched the wheel base out to 102", done a SOA, 4x4 Labs frombe high steer, Fj60 power steering, sm420, budbuilt crusher rear quarters. I'm not a fj40 purist. I just love how stout the FJ40s are. Plus they are an awesome base to build off of.

 

[toyondarox]

Here is our current 78 FJ40 build or at least what's left..... should make you fj purist guys cringe.

 

[thebigredrocker]

Welcome to Mud

Perhaps this thread will help
With SBC, Can you still use stock Water Temp and Oil Pressure gauges?

Have you mocked up your radiator and bib yet? From the angle of your picture it looks as if your fan blade might contact your radiator fins.
If not, COOL!!

 

[toyondarox]

Fan clears perfect. About 2-3" away Just had to build a shroud around it. It's been running this way for a few years! Just put new vortec heads on and freshend up the motor with new cam and lifters as well as a new water pump. Next project once I get this step done, Is the thottle body injection.

 

[thebigredrocker]

Is that the same Rig? The firewall looks dark green, not that it matters. Looks like you got'er close.

 

[toyondarox]

Lol no different rigs by far! The one pic of the motor is mine. The blue 40 is the one were building at our shop. There is a build thread on pirate4x4. Here is the link. zombie yota build! reincarnated - Pirate4x4.Com : 4x4 and Off-Road Forum

 

[thebigredrocker]

You can search stuff "bj40green" has posted. I know he messes around with gauges.

 

[toyondarox]

 

[toyondarox]

Welcome to Mud

Perhaps this thread will help
With SBC, Can you still use stock Water Temp and Oil Pressure gauges?

Have you mocked up your radiator and bib yet? From the angle of your picture it looks as if your fan blade might contact your radiator fins.
If not, COOL!!

You can search stuff "bj40green" has posted. I know he messes around with gauges.

Thanks! I will do that!

 

[toyondarox]

Thanks for that thread! Just what I was looking for. I know it had already been asked! But couldn't find the thread! Thanks bigredrocker!

 

[Coolerman]

I'm not so sure I would trust that motor to a OEM Toyota gauge setup. You may as well just put an after market gauge set in it that is accurate.

 

[bj40green]

Here we go: all info on clusters, gauges, etc here: -► Clusters, Gauges, Speedo & Odo meters
The TEMP gauge is 25 ohm but............................
The TEMP gauge gets a 7V working voltage from the FUEL gauge because the FUEL gauge has a build in Voltage Regulator that feeds itself and the TEMP gauge. This also implicates that you need the OEM Toyota sender(s) to get the gauge(s) working.

Rudi