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Greg Ondayko
Supercharged
Joined: 27 Nov 2004
Posts: 2763
Location: IRWIN PA
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Post subject:
Rear Gear Oil
(Mon Jan 30, 2012 2:39 pm)
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How many of you racers run 40 or 50 wt engine oil in the rear end of your drag car instead of 85W140 Hypoid stuff?
I have talked to romeo about this But I haven't tried it yet.. I don't want to blow anything up.. or shear gears or anything dumb like that.
I have heard stories about some guys doing this...
I was just curious..
Thoughts / discussions welcome
Greg |
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emsvitil
Supercharged
Joined: 12 May 2005
Posts: 4720
Location: So California
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Post subject:
(Mon Jan 30, 2012 2:46 pm)
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No hypoid additives, I wouldn't risk it............_________________ Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes
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Doc
Guru
Joined: 14 Oct 2002
Posts: 4976
Location: Working in Silicon Valley, USA
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slantzilla
Board Sponsor & Moderator
Joined: 17 Oct 2002
Posts: 9361
Location: Park Forest, Illinoisy
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Post subject:
(Mon Jan 30, 2012 3:56 pm)
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Spool or SG?
I have seen quite a few people run ATF when they have a spool.
Not sure I would go that thin, but it works for them.
_________________
Proud supporter of Mike Jeffrey Racing Engines since 1999.
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sandy in BC
Board Sponsor & SL6 Racer
Joined: 08 Nov 2002
Posts: 4599
Location: Burton BC canada
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Post subject:
(Mon Jan 30, 2012 4:03 pm)
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| A lot of the blown alcohol bogger cars run white grease......specially with ratios over 4.88 |
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turbo66valiant
EFI Slant 6
Joined: 19 Apr 2008
Posts: 349
Location: SoDak
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Post subject:
(Mon Jan 30, 2012 4:52 pm)
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Say,
The 50 wt crankcase oil is in the same viscosity range as the 90 wt gear oil. They rate them differently to get the different #'s. Confusing but true. Running the 75w90 would be a good choice. I see Redline's Superlite is just a 75w90. I've heard the same stories about ATF in rear-ends but never tried it. The ATF (10-20wt) would fall into the 75-80 wt class in gear oils. Good luck
Later,
Ryan |
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Ron Parker
SSRN National Champion
Joined: 31 Oct 2002
Posts: 2026
Location: Dalton, GA
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Post subject:
(Mon Jan 30, 2012 7:00 pm)
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this is one of my secrets of a race car that can stay dialed in. My car with the stock engine i used ------ in the rearend racers said you can not do this. I can do what i want to in my race car. With the Bruner race engine I use ------- in the rear end . It is not so much I would tell but it is about the performance and dependable that I have had and that is what it is worth. I can tell you what I have used and what i now use at the Banquit. Thanks Ron 
It Aint Over Until I Win
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sandy in BC
Board Sponsor & SL6 Racer
Joined: 08 Nov 2002
Posts: 4599
Location: Burton BC canada
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Post subject:
(Mon Jan 30, 2012 7:04 pm)
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| Not everyone can use chewin tobacco in their diff Ron.....it will mess yer Sure-Grip. |
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Slant Cecil
Board Sponsor
Joined: 01 Nov 2002
Posts: 1081
Location: Eustis, FL
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Post subject:
(Mon Jan 30, 2012 7:07 pm)
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| slantzilla wrote: | Spool or SG?
I have seen quite a few people run ATF when they have a spool.
Not sure I would go that thin, but it works for them. |
I bought a Duster in the mid '80s that had ATF in the diff along with 6.17 gears.
_________________
Slant Cecil
'68 V100, 225-2, 904 - ???
'68 V200, 225-1, 904 - 18.19@74
'68 Signet, 225-2, 904 - 17.42@79
'79 Aspen, 225-2, 904-???
'82 D150, 225, 833OD
'84 D100, 225, 833OD
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Ron Parker
SSRN National Champion
Joined: 31 Oct 2002
Posts: 2026
Location: Dalton, GA
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Post subject:
(Mon Jan 30, 2012 7:09 pm)
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wrong answer Sandy as usual but it could be Bagel frosting Ron
It Aint Over Until I Win
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Greg Ondayko
Supercharged
Joined: 27 Nov 2004
Posts: 2763
Location: IRWIN PA
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Post subject:
(Tue Jan 31, 2012 5:05 am)
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| slantzilla wrote: | Spool or SG?
I have seen quite a few people run ATF when they have a spool.
Not sure I would go that thin, but it works for them. |
In My case this would be with a spool.
No sure grip or clutches of any kind.
I want to try to achieve some oil / weight / viscosity between cold runs and hot ones..
THe cold runs the car is a bit slower so If at a race the car sits looooong between rounds or is just cold it slows down sometimes a tenth. 
Greg |
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Rob Simmons
SL6 Racer & Moderator
Joined: 29 Jan 2003
Posts: 4469
Location: Elizabethtown, KY
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Rob Simmons
SL6 Racer & Moderator
Joined: 29 Jan 2003
Posts: 4469
Location: Elizabethtown, KY
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Post subject:
(Tue Jan 31, 2012 12:17 pm)
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| Greg Ondayko wrote: |
I want to try to achieve some oil / weight / viscosity between cold runs and hot ones..
THe cold runs the car is a bit slower so If at a race the car sits looooong between rounds or is just cold it slows down sometimes a tenth.
Greg |
I've seen many of the faster cars (You know, the Big Dogs) running their cars up on jack stands before a pass to warm up the trans and rear...
_________________
Rob
I want to "Slant" the world!
... one vehicle at a time...
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Greg Ondayko
Supercharged
Joined: 27 Nov 2004
Posts: 2763
Location: IRWIN PA
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Post subject:
(Tue Jan 31, 2012 2:47 pm)
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| Rob Simmons wrote: | | Greg Ondayko wrote: |
I want to try to achieve some oil / weight / viscosity between cold runs and hot ones..
THe cold runs the car is a bit slower so If at a race the car sits looooong between rounds or is just cold it slows down sometimes a tenth.
Greg |
I've seen many of the faster cars (You know, the Big Dogs) running their cars up on jack stands before a pass to warm up the trans and rear... |
Yes I have done this and it does help, but it's not the same as a 105 mph blast down the 1/4 Mile At times rear gear temps after a run are 105* and then quickly cooll back to 85-60* running on a jack somtimes gets it back up to 90*..
Greg |
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slantzilla
Board Sponsor & Moderator
Joined: 17 Oct 2002
Posts: 9361
Location: Park Forest, Illinoisy
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