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Topic Review (Newest First)
02-24-2019 04:17 PM
mdogg
Quote:
Originally Posted by 65Chevy4x4 View Post
When will someone install a block heater in the diffs and plug it in before race. Or wire it up in a toggle switch to warm it up
https://www.princessauto.com/en/deta...er/A-p4270100e
02-23-2019 07:38 AM
65Chevy4x4 Next year if it's that cold you'll see guys with propane heaters. Generators and those blankets. Or something to warm up the diffs. Not worth the risk. Trophy truck team my friend worked for said 45 min minimum with tires in air to warm them up and that was in 60 degree weather.
02-23-2019 12:42 AM
rockyota83 https://www.summitracing.com/parts/a...6424?rrec=true

https://www.summitracing.com/parts/mor-23995?rrec=true
02-22-2019 09:29 PM
Rooster831
Quote:
Originally Posted by 65Chevy4x4 View Post
When will someone install a block heater in the diffs and plug it in before race. Or wire it up in a toggle switch to warm it up
Thats the main thing ive been thinking about hah, Or maybe have a propane shop heaters pointed at the diffs for awhile before the start. that 250wt shit is nasty thick even when its 60 degrees. Its gotta be like nearly solid at 30 degrees, the ring gear probably just digs a hole in it and nothing makes it to the pinion gears for the first 30 minutes of the race. also i bet its a huge horsepower killer until its warm.
02-22-2019 04:16 PM
65Chevy4x4 When will someone install a block heater in the diffs and plug it in before race. Or wire it up in a toggle switch to warm it up
02-22-2019 02:54 PM
Rock Dog
Quote:
Originally Posted by keeptahoewhite View Post
I have seen numerous cars on jacks getting their diffs warm before ultra4 races.
I had new GW HP10s this year with 250wt oil. I used immersion heaters in the diffs just before lining up to bring the oil temp up to 70-80F. Made it work just fine vs. driving thru tar the first 10-15 mins.
02-22-2019 11:19 AM
mobil1syn i bet the TTs lasted longer because of the 20mi sprint doing little damage, then it had chance to heatsink and get warm, then fail at the end of the race due to previous damage.
02-22-2019 10:37 AM
hurleygo3
Quote:
Originally Posted by ky scrambled View Post
Searching and I found this video.
https://www.youtube.com/watch?v=Y-FYdAzLjg8
That's a great video. Now imagine 250wt
02-22-2019 10:24 AM
ky scrambled
Quote:
Originally Posted by Pokeman View Post
.
Quote:
Originally Posted by Kunker View Post
I'm assuming it would get slung off, and take a long time to drain back down to the gear to get slung back up to the pinion and help with lubrication. See the Banks youtube channel for the gear oil stuff he's been doing. If it's as thick as molasses when they start, I can't see it draining back down or effectively getting into the pinion bearing to provide much lubrication until it warms up.
Quote:
Originally Posted by hurleygo3 View Post
There's a video on FB, I'm trying to find it. They are trying to pour 250wt into a diff when it was cold, not even freezing. Hold the jug upside down and it doesn't come out of the 2" opening. The shit is crazy thick.
Searching and I found this video.
https://www.youtube.com/watch?v=Y-FYdAzLjg8
02-22-2019 09:51 AM
hurleygo3
Quote:
Originally Posted by ky scrambled View Post
I understand that. Heavy weight is needed because of heat generated correct?

Are the bearings burning up in a mile? 2 miles? Instantly?

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move?
There's a video on FB, I'm trying to find it. They are trying to pour 250wt into a diff when it was cold, not even freezing. Hold the jug upside down and it doesn't come out of the 2" opening. The shit is crazy thick.
02-22-2019 09:50 AM
Kunker
Quote:
Originally Posted by ky scrambled View Post
I understand that. Heavy weight is needed because of heat generated correct?

Are the bearings burning up in a mile? 2 miles? Instantly?

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move?
I'm assuming it would get slung off, and take a long time to drain back down to the gear to get slung back up to the pinion and help with lubrication. See the Banks youtube channel for the gear oil stuff he's been doing. If it's as thick as molasses when they start, I can't see it draining back down or effectively getting into the pinion bearing to provide much lubrication until it warms up.
02-22-2019 09:48 AM
Pokeman
Quote:
Originally Posted by ky scrambled View Post
I understand that. Heavy weight is needed because of heat generated correct? I dont know, I just put in the oil GW tells me

Are the bearings burning up in a mile? 2 miles? Instantly? Both. Nick Nelson reported feeling it right off the start line. My guess is its so thick its forcing defection but that might be dumb. I think its safe to say the damage starts at the start line, jamming 650 to 800 HP down the 3rd's throat

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move? only happened in rear LP, not in front HP. I am sure there is a reason, it could be more force on the rear or design.

All great questions.
.
02-22-2019 09:40 AM
ky scrambled
Quote:
Originally Posted by Pokeman View Post
It's the 250wt oil. Not 75-90. The GearWorks stuff requires a super thick oil. at room temp it barely wants to move out of the oil jug.
I understand that. Heavy weight is needed because of heat generated correct?

Are the bearings burning up in a mile? 2 miles? Instantly?

Does cold oil not splatter/sling enough to coat a pinion bearing? Just sits in the bottom of the diff waiting to get warm enough to move?
02-22-2019 08:39 AM
Pokeman
Quote:
Originally Posted by ky scrambled View Post
This makes zero sense to me.
It's the 250wt oil. Not 75-90. The GearWorks stuff requires a super thick oil. at room temp it barely wants to move out of the oil jug.
02-22-2019 08:36 AM
ky scrambled
Quote:
Originally Posted by hurleygo3 View Post
This year was the coldest to date. But I will say. Dave had us line up at 7am. Much later than past years. But even than. These diffs sat in sub 30 deg weather all night. It'd take sometime to warn them up on stands, than sit again for at least and hour. That oil would be crazy thick at start, and they just hammer down.
This makes zero sense to me.
02-22-2019 07:13 AM
Pokeman
Quote:
Originally Posted by keeptahoewhite View Post
I have seen numerous cars on jacks getting their diffs warm before ultra4 races.
In 3 years I haven't that I recall. Maybe I am focused on my own stuff...

Quote:
Originally Posted by hurleygo3 View Post
....That oil would be crazy thick at start, and they just hammer down.
yup... instant issue a la Nelson

Quote:
Originally Posted by DZ Fab View Post
Pretty sure the dude who runs/owns Gearworks was Nick Nelsonís co-driver.
I wonder what he would say about warming the oil and ambient temp vs all the KOH early rear diff losses.
02-21-2019 07:54 PM
DZ Fab
Quote:
Originally Posted by Pokeman View Post
I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.
Pretty sure the dude who runs/owns Gearworks was Nick Nelsonís co-driver.
02-21-2019 04:05 PM
hurleygo3
Quote:
Originally Posted by Pokeman View Post
I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.
This year was the coldest to date. But I will say. Dave had us line up at 7am. Much later than past years. But even than. These diffs sat in sub 30 deg weather all night. It'd take sometime to warn them up on stands, than sit again for at least and hour. That oil would be crazy thick at start, and they just hammer down.
02-21-2019 02:43 PM
keeptahoewhite
Quote:
Originally Posted by Pokeman View Post
I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.

I have seen numerous cars on jacks getting their diffs warm before ultra4 races.
02-21-2019 07:20 AM
Pokeman
Quote:
Originally Posted by hurleygo3 View Post
I wonder if the cold had anything to do with it. 250wt has got to be nasty at 20 degs.
Quote:
Originally Posted by 65Chevy4x4 View Post
You'll see trophy trucks running the truck on the stands before starting the races, do ultra 4 guys do that to warm up the gear oil?
Quote:
Originally Posted by Saluki ATO View Post
Iíve seen them doing it in past years. Didnít wander thru the staging lanes this year though.
Quote:
Originally Posted by Rooster831 View Post
Thats what I was wondering, i bet the pinion bearings got wiped out before the oil got heated up enough.
I've never seen a u4 warm up the gear oil before a race... but you know what, I will be doing this on cold days. Inline for KOH to start takes 2-3 hours, you would have to have your pit crew at the car with a jack and stands.

Nick nelson said he felt his rear end shimmy right off the line. It makes total sense that it got wiped out when he pounded the throttle. Being first in line means it sat cold and unmoved for at least 2 hours before mashing the gas 100%.

the things you can learn watching and reading. I wonder what GW would say about this... I might call them.
02-18-2019 10:33 AM
Drakeslayer Jorden Pelegrino said during the KOH Experience that his rear diff got to 370 degrees before it seized. Tony stated that they were "Obviously" going to the manufacturer for answers.
We had heard earlier that he lost oil due to leaky seals in his "Prototype" diffs that 4 of the T1 trucks were also using. That info came from a secondhand source so take it for what it's worth.
02-17-2019 09:08 PM
Rooster831
Quote:
Originally Posted by hurleygo3 View Post
I wonder if the cold had anything to do with it. 250wt has got be nasty at 20 degs.
Thats what I was wondering, i bet the pinion bearings got wiped out before the oil got heated up enough.
02-16-2019 05:50 AM
Saluki ATO
Quote:
Originally Posted by 65Chevy4x4 View Post
You'll see trophy trucks running the truck on the stands before starting the races, do ultra 4 guys do that to warm up the gear oil?
Iíve seen them doing it in past years. Didnít wander thru the staging lanes this year though.
02-15-2019 02:00 PM
65Chevy4x4 You'll see trophy trucks running the truck on the stands before starting the races, do ultra 4 guys do that to warm up the gear oil?
02-15-2019 01:52 PM
hurleygo3 I wonder if the cold had anything to do with it. 250wt has got to be nasty at 20 degs.
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