Oil Pressure Switch Threads

[MrGiggles]

Does anyone know off hand what threads the FSDE uses for the oil pressure switch? I'm going to be adding an oil pressure gauge and will likely need to add a T fitting to the back of the block, so I can run both the gauge and the factory switch. Unless there's another oil passage somewhere that's a little easier to access.

Additionally, those of you that have aftermarket gauges, what power source did you splice into for gauge illumination?

 

[zackmac]

http://www.mazdas247.com/forum/show...ack-Mac-s-P5&p=6387761&viewfull=1#post6387761

that is what i did for mine, i drew up a quick diagram. for power i did the add-a-circuit fuse and used the radio fuse in the kickpanel box.

i used an oil filter sandwich adapter for my turbo feed, and i tapped into that for the oil pressure gauge. pretty easy and convenient if you don't have the windage tray tapped

 

[MrGiggles]

http://www.mazdas247.com/forum/show...ack-Mac-s-P5&p=6387761&viewfull=1#post6387761

that is what i did for mine, i drew up a quick diagram. for power i did the add-a-circuit fuse and used the radio fuse in the kickpanel box.

i used an oil filter sandwich adapter for my turbo feed, and i tapped into that for the oil pressure gauge. pretty easy and convenient if you don't have the windage tray tapped

So your gauges are switched with the key?

I was wanting to somehow integrate them with the headlights, so they are illuminated like the cluster lights.

 

[MrGiggles]

Edited because of wrong information.

 

[Maxx Mazda]

Just to update this, the threads on the factory switch are 1/8 NPT. Since I'm not running a turbo or using the sandwich plate, I'll just use a brass tee fitting.

Wrong. They are not NPT they are BSPT. 27 threads/inch versus 28 threads/in. You can force an NPT sender into there but the proper fitting would ensure no leaks. See my build thread for more information.

 

[i12drivemyMP5]

I'll be doing sammich plate, tapping gauge cluster for lighting and catching pwr off cig lighter fuse whenever I get unlazy enough...........elec oil pressure and volts

 

[Maxx Mazda]

I'll be doing sammich plate, tapping gauge cluster for lighting and catching pwr off cig lighter fuse whenever I get unlazy enough...........elec oil pressure and volts

You can't tap the gauge cluster for lighting. It's contained within the cluster itself. Tap the dimmer switch wiring.

 

[MrGiggles]

Wrong. They are not NPT they are BSPT. 27 threads/inch versus 28 threads/in. You can force an NPT sender into there but the proper fitting would ensure no leaks. See my build thread for more information.

I'm glad you caught that. A new switch from Autozone had NPT, that's what I get for trusting a parts store.

 

[Maxx Mazda]

I'm glad you caught that. A new switch from Autozone had NPT, that's what I get for trusting a parts store.

Look here post #30 for more info and pics:

http://www.mazdas247.com/forum/show...Build-Thread&p=5647833&viewfull=1#post5647833

 

[i12drivemyMP5]

You can't tap the gauge cluster for lighting. It's contained within the cluster itself. Tap the dimmer switch wiring.

Yeah, that, I tapped it for somethin else so it'd dim too so I'll tap the tap