Reply With QuoteVery interesting - I guess I can see the "vintage" thing, but its still soo goofy!
Major Contributor
Another crazy mod: diff oil cooler belt driven
Dinan used to do it... why not me :-)
I know that it would be easier to use a Tilton electrical pump, but I am running vintage and the car has to be to spec and BMW was using a 1/2 shaft belt driven pump.
See picture here: http://bmwe34.wetpaint.com/page/Differential+oil+cooler
Sounds like a fun thing to do, add any cooments you have.
'85 Euro 635csi Race Turbo, megasquirt, Group A
'92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
'02 Subaru WRX Wagon with STI springs, bigger sway bars
5-10 Grand Master
Very interesting - I guess I can see the "vintage" thing, but its still soo goofy!
Major Contributor
Actually some nascar teams were using the same principle, might have been off the driveshaft, I cannot find any pictures of a nascar diff with a belt driven cooler.Originally Posted by Jon K
It is a funny project to do non the less, and will keep the car vintage spec.
'85 Euro 635csi Race Turbo, megasquirt, Group A
'92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
'02 Subaru WRX Wagon with STI springs, bigger sway bars
4 Grand Master
Is there enough heat generated in a vintage race to need this? Or is this to extend oil life?
"The gas pedal wouldn't go to the floor if it weren't meant to be there"
Major Contributor
Might be ok for a 30 min race. But if I can keep my diff cooler and keep it longer, I might as well retrofit a pump.
'85 Euro 635csi Race Turbo, megasquirt, Group A
'92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
'02 Subaru WRX Wagon with STI springs, bigger sway bars
5-10 Grand Master
some road racers run the alternator off the driveshaft in the back of the car, id run the pump off the driveshaft for more pump speed and theres a good bit of room in front of the subframe on the right side where they eventually put that huge resonator on the 88-89s, i have been thinking about building pumps for my truck for the diff and tranny and probably will if i start doing long hauls, id use a small power steering pump and a filter
all america wants is cold beer warm cat and a place to take a poop with a door on it
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