Oil cooler diverter valve

The Gorilla · 16-01-2014, 11:33 AM

Hi.

Quote - '' The way it works on the S54 engine is that it doesn't release all the oil through the cooler when it gets hot, so this is why you get excessive oil temps on track, as the oil cooler isn't being fully utilised.

I am not sure I folllow any of this any more.

The Oil stat in the S54 Oil filtre housing
is controlled via a spring return stat that when closed
pushes the oil across the to the other side
where the Oil cooler return is, which in turn feeds
the distribution block for the oil galleys.

When the stat is open the oil flows into the
oil cooler and back to the distribution block.

When the Oil Stat opens oil pressure does not
alter or drop theerfore the flow path with the
Stat open will take the majority of flow and volume
of oil as opposed the oil flow path when the
stat is shut.

Oil flow is similar to water flow in that it will
always flow in the direction of the least line
of rtesistance, which with the stat open is
straigh on, not acreoss the 'bridge' as when
the stat is closed.

[Oil pressure is measured via resistance, flow and
oil viscosity]

Hence my point Oil temp is oil temp, so in order
to achieve a greater oil flow you require a larger
id bore and or a greater pressure, otherwise the
volume of oil going thru the Cooler with the stat
open is pretty much the same as the amount of oil
going diretly to the distribution block with the
stat closed.

You also mention Vanos which is the second from last port of
call on the oil feed supply chain.

If you have the Oil stat removed and in effect
a blanking sleeve fitted, on start up not only
is the oil much cooler for a longer period,
not particuliar good, but your having to
pressure up the oil cooler and oil cooler lines before
oil is fed up to the Vanos, and then Cams which is not the
case with the Oil Stat fitted.

You want the oil to the Vanos and Cams as quick
as possible on start up, not start introdcuing
delays.

There is no free lunch, and if you think that
50 or 60.00 pounds is going to drop oil temps
on a S54 at being ragged on Track then fit them
in, I'ii just stick with my oil to water heat
exchanger which works fine with the Oil stst
still in place.

Regards,

The Gorilla.

16-01-2014, 11:33 AM	#9
The Gorilla S5, Sport Off, DSC M-track Join Date: Apr 2008 Posts: 740 Casino cash: $14401	Hi. Quote - '' The way it works on the S54 engine is that it doesn't release all the oil through the cooler when it gets hot, so this is why you get excessive oil temps on track, as the oil cooler isn't being fully utilised. I am not sure I folllow any of this any more. The Oil stat in the S54 Oil filtre housing is controlled via a spring return stat that when closed pushes the oil across the to the other side where the Oil cooler return is, which in turn feeds the distribution block for the oil galleys. When the stat is open the oil flows into the oil cooler and back to the distribution block. When the Oil Stat opens oil pressure does not alter or drop theerfore the flow path with the Stat open will take the majority of flow and volume of oil as opposed the oil flow path when the stat is shut. Oil flow is similar to water flow in that it will always flow in the direction of the least line of rtesistance, which with the stat open is straigh on, not acreoss the 'bridge' as when the stat is closed. [Oil pressure is measured via resistance, flow and oil viscosity] Hence my point Oil temp is oil temp, so in order to achieve a greater oil flow you require a larger id bore and or a greater pressure, otherwise the volume of oil going thru the Cooler with the stat open is pretty much the same as the amount of oil going diretly to the distribution block with the stat closed. You also mention Vanos which is the second from last port of call on the oil feed supply chain. If you have the Oil stat removed and in effect a blanking sleeve fitted, on start up not only is the oil much cooler for a longer period, not particuliar good, but your having to pressure up the oil cooler and oil cooler lines before oil is fed up to the Vanos, and then Cams which is not the case with the Oil Stat fitted. You want the oil to the Vanos and Cams as quick as possible on start up, not start introdcuing delays. There is no free lunch, and if you think that 50 or 60.00 pounds is going to drop oil temps on a S54 at being ragged on Track then fit them in, I'ii just stick with my oil to water heat exchanger which works fine with the Oil stst still in place. Regards, The Gorilla.