High Performance Driver Tutoring
What is "pump"?
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Posted by Jon Weal at 05:32 PM on Jun 10, 2008
Post #1

I've googled it with little luck... what does the differential setting "pump" do?

Enis D Menace
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Posted by Enis Dauti at 05:45 PM on Jun 10, 2008
Post #2

Differential pump, to my knowledge, simulates viscous type of differential. Now google that and see how viscous diff works. :P

TheGrind
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Posted by Kent Welker at 06:02 PM on Jun 10, 2008
Post #3

I have asked myself the same question.

Maybe Tim will find time to update the "DIFFS" quide.

http://www.race2play.com/forum/list_posts/4133

Posted by Doug Dezan at 06:15 PM on Jun 10, 2008
Post #4

Pump for differential lock. To high and it could create understeer.

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Posted by Conor McCarrell at 08:05 PM on Jun 10, 2008
Post #5

There's a few threads on RSC concerning this. From what I've read:

More than 50%= looser on exit, tighter on entry.
Less than 50%= tighter on exit, looser on entry.

I've been testing varies pump values when running the F1 cars and FABCARS the past few weeks and those principles seem to hold up. At 50%, I don't really notice anything so I don't know if that is neutral or just focuses towards the ramp angles on the power and coast.

I think Enis is in the ballpark on what it relates to. Although, there are a few differential types that use a fluid within the differential to apply differing torque to the rear wheels so I am not sure what rFactor uses.