Oil Temp Sender

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02-05-2005, 05:01 PM

#11

Feds

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Quote:

Originally Posted by Jeff20B' date='Feb 5 2005, 03:56 AM

In that case, just install the temp sender in the oil pan. It'll show the oil at its hottest, but at least you'll be that much closer to a MegaSquirt. If given the choice, it's what I'd do in your situation. You can always get an adapter later. Besides, the MegaSquirt only measures water and air temperature.

By the way, do you know about the 47k ohm bias resistor needed at R4 if using the stock Mazda air temp thermistor?

<{POST_SNAPBACK}>

Thanks for the tip on the resistor. I'm still debating final specs of my install, and developing a bench calibration.

We are putting a MS in the racecar this season, and based on how that goes I am going to drop one in my 4-port rebuild next year. I may even go squirt&spark. One of my local guys already has this setup in his SA.

Before any of that happens, I have a few single turbo FD's with PowerFC's that need my attention. Never stop learning, right?

I got the oil temp gauge because I have made a lot of changes to my cooling system, and I don't belive I am getting enough heat into the engine, so I want to be sure. If I do go oil pan, I have the Mazda Comp numbers to go by, and if i t-in on the pressure gauge, I have the experience here, and the proximity to the filter to make judgements.

Regardless, I am going to do the dissassembly tomorrow before the game and see if i can find the parts to t-in this week. The season is getting close, and I still need paint!

02-06-2005, 03:05 AM

#12

Jeff20B

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The MS info I posted in this thread might be usefull to you. http://www.rx7club.com/forum/showthread.php?t=389572

02-08-2005, 08:29 PM

#13

Cheers!

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Quote:

Originally Posted by j9fd3s' date='Feb 4 2005, 02:08 PM

i tapped the banjo bolt on the oil line and put it there

<{POST_SNAPBACK}>

if you add a T, can a oil pressure be read off there?

02-09-2005, 11:44 AM

#14

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Quote:

Originally Posted by Cheers!' date='Feb 8 2005, 10:28 PM

if you add a T, can a oil pressure be read off there?

<{POST_SNAPBACK}>

What do you, follow me around?!?!

Think aboot it... Since the column of oil in the T would be standing still, it would have to equal the pressure in the line.

I always hated Fluids.

02-09-2005, 10:25 PM

#15

Cheers!

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I'm an electrical engineer. Shouldn't you be working and not posting?

The entire oil system is at the same pressure right? Hrm...

02-10-2005, 07:28 AM

#16

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Quote:

Originally Posted by Cheers!' date='Feb 10 2005, 12:24 AM

I'm an electrical engineer. Shouldn't you be working and not posting?

The entire oil system is at the same pressure right? Hrm...

<{POST_SNAPBACK}>

Then I will put it to you in terms you can understand..

NO, the entire oil system is not at the same pressure!!!!!!

Think of pressure as voltage. Coming out of the pump (battery) the pressure (voltage) is at its highest. Every time it goes through a passage (resistance), the pressure (voltage) drops. You can think of small sections of pipe just like small sections of wire, the resistance is small enough to be ignored.

At the same time, in order for there to be flow, there has to be a pressure difference, so the pressure at the start and end of say the oil cooler lines will be different.

Besides, I don't "work" anymore. I do just enough to not get fired, and spend the evening looking for new jobs.

02-11-2005, 04:29 PM

#17

Feds

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Just to cap this thread off...

I did what I should have done from the begining, and consulted the FSM.

Basically, the area where the pressure sender mounts is equivalent in terms of pressure, temperature, and flow to the filter pedistal, so it is a fine place to mount.

My gauge showed up. In the end it probably cost me nearly as much as buying a new one, but live and learn. At least it's in proper metric units and not this weird farenheit BS.