high volume oil pump gear and high pressure relief valve????

[IRDEATH1340]

Like to hear opinions on these items, is there a huge benefit or am I wasting my money, is it just good insurance while im getting rods and pistons put in to have these go in as well?? I can see the logic in having higher oil flow but I searched around and found many different opinions.

 

[oldgixxer]

Some people are for,and against. Ive heard argument's from both sides;that being said I have them in both turbo bikes

 

[GIXERHP]

There is nothing wrong with more lubrication.

 

[1busa]

^^^ what he said.........

 

[shade]

It does generate more oil pressure though which isn't always a good thing especially for turbos

 

[icemansid]

This is something I am very curious about. I have heard that people reported (via datalogger) that a high speed oil gear will cavitate and you will actually loose oil pressure. Some people say use the high pressure relief valve over the gear and some say use both.. I will be logging my oil pressure this year (if i ever get the bike to the dyno).... so i hope to have data to share.

 

[hendrixgr]

Hi.
I have both on my turbo bike for quite some time now.
I have searched everywhere for information before i install them and here is what i have learned so far:
The gear is a very good mod as it increases the low (and of course high) rpm oil pressure which can get very low sometimes during idle and low rpm operation.
It also increases the water pump's rpm thus increasing overall engine cooling.
Now the oil relief valve is another matter because of the way it achieves the increased oil pressure.
The original valve opens at 60 psi diverting the oil back to the oil pan but the modified valve opens at 120 psi forcing most of the oil to move inside the engine,
especially when the oil is hot, dangerously lowering the oil pan level.
Sometimes the oil will drop back to the sump (using gravity) to late to keep the oil level high enough which makes the oil pump suck air and then bearings go to heaven.
If you decide to fit one remember to fill the engine with oil until the oil goes to the top of the glass and then a hair more, i run 4 quarts without a filter change and 4.5 when i change my filter.
Also be careful not to rev the engine up when cold or the oil filter will start leaking oil badly.
Btw i consider the dry sump mod to be the ultimate mod if there is enough room for the oil tank, something not possible in my case.
Of course this is my opinion only and i could be wrong so if anyone knows something more please feel more than welcomed to add your opinion or knowledge
to this thread.

 

[POWERHOUSE]

Hi.
I have both on my turbo bike for quite some time now.
I have searched everywhere for information before i install them and here is what i have learned so far:
The gear is a very good mod as it increases the low (and of course high) rpm oil pressure which can get very low sometimes during idle and low rpm operation.
It also increases the water pump's rpm thus increasing overall engine cooling.
Now the oil relief valve is another matter because of the way it achieves the increased oil pressure.
The original valve opens at 60 psi diverting the oil back to the oil pan but the modified valve opens at 120 psi forcing most of the oil to move inside the engine,
especially when the oil is hot, dangerously lowering the oil pan level.
Sometimes the oil will drop back to the sump (using gravity) to late to keep the oil level high enough which makes the oil pump suck air and then bearings go to heaven.
If you decide to fit one remember to fill the engine with oil until the oil goes to the top of the glass and then a hair more, i run 4 quarts without a filter change and 4.5 when i change my filter.
Also be careful not to rev the engine up when cold or the oil filter will start leaking oil badly.
Btw i consider the dry sump mod to be the ultimate mod if there is enough room for the oil tank, something not possible in my case.
Of course this is my opinion only and i could be wrong so if anyone knows something more please feel more than welcomed to add your opinion or knowledge
to this thread.

Revving the engine up cold with the high volume oil pump gear AND high pressure relief valve will - in the extreme - blow the oring right out of the oil filter. I can also tell you that it is flow - not pressure - that protects the motor. I have seen too much pressure disrupt flow and cause premature engine failure. For that reason, use the high volume oil pump gear, and make sure you get the Robinson Industries gear. I have seen copycats (the black ones are the worst) that not only fit badly, but can actually break in two over time. And yes, with this gear the water pump will also spin faster, hendrixgr is correct.

 

[hendrixgr]

Revving the engine up cold with the high volume oil pump gear AND high pressure relief valve will - in the extreme - blow the oring right out of the oil filter. I can also tell you that it is flow - not pressure - that protects the motor. I have seen too much pressure disrupt flow and cause premature engine failure. For that reason, use the high volume oil pump gear, and make sure you get the Robinson Industries gear. I have seen copycats (the black ones are the worst) that not only fit badly, but can actually break in two over time. And yes, with this gear the water pump will also spin faster, hendrixgr is correct.

I have been thinking for a long time to return to the stock oil relief valve and i think i will do it as soon as possible.
After all the gear alone (i do have the Robinson industries one) also raises the max pressure a bit.
Chris