Diff Oil Temp Sensor.
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
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Diff Oil Temp Sensor.
I am looking to add a diff oil temp sensor using the Diff Drain / Fill Plug. Anyone know the thread specs for the filler plug.
As for reasons, car is mainly used for track days and adding a diff oil cooler to the car.
I believe its a 14 TPI
As for reasons, car is mainly used for track days and adding a diff oil cooler to the car.
I believe its a 14 TPI
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
Understand that will help, but after enough miles will this not happen anyways. My original diff now has 220k km and only items replaced are the side yokes.
as for my new diff I am expecting it to run hot until the gears start to wear a bit, or will good friction modifiers prevent this from happening at all.
So step 1 I want to measure the temps to see if I should add a cooler for track days. Normally where I drive a hot day is 25c (77) but we are now experencing 30-33c (86-92) spring days.
as for my new diff I am expecting it to run hot until the gears start to wear a bit, or will good friction modifiers prevent this from happening at all.
So step 1 I want to measure the temps to see if I should add a cooler for track days. Normally where I drive a hot day is 25c (77) but we are now experencing 30-33c (86-92) spring days.
Thread Starter
Melting Slicks
Joined: Jun 2011
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Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I always wanted to weld up the centered jacking point on my Vette.
Gary R. also pointed out that this is NOT plumed correctly. It should spray from the side of the cover aimed at the ring gear. This is Vic Edelbrocks old vette back when he was still racing and it does have a nice pusher fan setup through the radiator.
Last edited by gkull; May 10, 2023 at 10:18 AM.
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Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I tried to find max temp for Valvoline full synthetic 75W-140 and I came up with this. They conducted tests on oil/component durability. They found components should not be operated at consistent temperatures above 250F. Intermittent operations to 300F do not harm the components or oils (synthetics).
Kind of like the old Mobil One commercial heating the synthetic in a frying pan to something like 280F before it started to change color and smoke.
My 245 was on a 105 degree day last spring race in Vegas before the summer heat shut down on the long road course. @30 minute sprint race sessions. I had a cooled air helmet and was thinking that I needed to invest in a full cool suite before getting a diff cooler!
The track temp was almost 140 and probably over 120 inside my hot vette waring a fire suit, gloves and boots.
Kind of like the old Mobil One commercial heating the synthetic in a frying pan to something like 280F before it started to change color and smoke.
My 245 was on a 105 degree day last spring race in Vegas before the summer heat shut down on the long road course. @30 minute sprint race sessions. I had a cooled air helmet and was thinking that I needed to invest in a full cool suite before getting a diff cooler!
The track temp was almost 140 and probably over 120 inside my hot vette waring a fire suit, gloves and boots.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
This drain plug is the best mod you can do and the second best is polishing out the heavy duty rear diff cover. Something Gary told me to do. The HD diff covers are so robust compared to a OEM.
Just getting started making my inside cover look like a mirror.
Just getting started making my inside cover look like a mirror.
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
I always wanted to weld up the centered jacking point on my Vette.
Gary R. also pointed out that this is NOT plumed correctly. It should spray from the side of the cover aimed at the ring gear. This is Vic Edelbrocks old vette back when he was still racing and it does have a nice pusher fan setup through the radiator.
Gary R. also pointed out that this is NOT plumed correctly. It should spray from the side of the cover aimed at the ring gear. This is Vic Edelbrocks old vette back when he was still racing and it does have a nice pusher fan setup through the radiator.
Fill entry here. Which looks like entry is direct at the gears.
They also added the wire support since I have had bolts come loose and drop into the diff. ( not sure if this was a good idea ) but I did read about others having similar problems.
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
Thread Starter
Melting Slicks
Joined: Jun 2011
Posts: 3,116
Likes: 598
Race Director
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From: Virginia
You have an external oil cooler, and even if you didn't, I can't imagine it helps with that in any measurable way. Just bolting on some CPU cooling fins to the outside of the cover would seem to have a much larger effect.
Last edited by Bikespace; May 11, 2023 at 06:29 PM.
Team Owner
Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I was wondering about that too. @gkull, can you explain the reasoning behind this, or point to an online reference? Does it reduce frothing of the oil or something?
You have an external oil cooler, and even if you didn't, I can't imagine it helps with that in any measurable way. Just bolting on some CPU cooling fins to the outside of the cover would seem to have a much larger effect.
You have an external oil cooler, and even if you didn't, I can't imagine it helps with that in any measurable way. Just bolting on some CPU cooling fins to the outside of the cover would seem to have a much larger effect.
I had the Wiseco custom pistons cut for up to 2.18 intake valves and .800 lift
Last edited by gkull; May 12, 2023 at 12:08 AM.