Shimming To Increase Oil Pressure?

[240sxOwner]

I have the motor apart at the moment and i noticed that my cams and lifters look a little oil deprived....Has anyone else shimmed the oil pressure on the pump? If so how much did you shim it and what was the increase. Thanks for the help.

[AZhitman]

Yes, mine's been done. Check with Ivan at AMS, he's the one who set mine up.

[240sxOwner]

can you tell any difference? Quieter?

[Florida240sx]

Any details? There was a thread on it somewhere...

[ace0073]

well, mind you i havent actually driven my car yet, but i bought the rebuild kit from AMS, first. Then when i installed it i added one thin washer...approx. 1mm thick. when i started the car it idled at 50psi pressure. while revving with no load on the motor (approx. 4000 rpm) it is at 75psi. i am not sure how much is too much but this is what i saw. i did let the car idle for about 20min to see if it would change as the car heated up but stayed at 50psi.

[Dammitboy]

I did this on my old mazda motor years back & had similiar pressures. My machinist told me though that sustained pressures greater then 80psi can wash the babbit off your bearings.

Upon reading your pressures on your KA, I think I will remove one shim, & try to find a thinner shim. I had about 2mm of shim in my new oil pump!

Kevin

[AZhitman]

I'm running a TOGA high-volume pump, and I run about 50psi cold, 30 psi hot. I'm also running a MONSTER-sized thermostatically-operated oil cooler.

[RBbugBITme]

Just so you know, I saw one of the AMS guys took a TOGA high volume apart and said it was identical to stock.