NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)
-   -   Shimming Of Front Oil Pressure Regulator? (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/shimming-front-oil-pressure-regulator-35869/)

silverrotor 04-06-2004 10:33 PM

I guess thats what Chris @ Racing Beat meant about being okay. I kinda wished he had mentioned the washers provided to shim the Front Control Valve Regulator...atleast I heard It here - which Is good enough for me.



scathcart excellent rundown you provided with the diagram/description.

diabolical1 12-29-2004 03:38 PM


Originally Posted by mazdaspeed7' date='Apr 4 2004, 05:47 PM
Who do you trust more? Racing Beat or Mazda? The FSM clearly stated 156 PSI is the bypass point for the front oil pressure regulator.


is this the FSM for the T2 or the FD?

Maxt 12-30-2004 08:14 AM

I have a fitting installed pre oil cooler, there is 50-60 psi pressure drop across the oil cooler, depending on oil temp, the coolers internal bypass will allow oil flow should the cooler plug off but your oil temps will be very high, it wont starve the engine of oil, just feed it hot oil... The limit of the stock oil cooler is about 160 psi as I found out, pressure of 160 + balloon the inlet tank, and make it spider web crack,making it garbage..

If you are going to run the hp regualtor and shim the front cover, make sure the the thermal bypass in the cooler is working, or you put one in the line should you run an aftermarket cooler, this will lower the the pressure the drop across the cooler and in turn the pressure the oil cooler/feed line/front cover reg will see when the engine is cold, once the oil is hot, the pressures fall down a bit on those parts and its not so much of an issue... Maxt

boyrotor 01-10-2005 08:37 PM

Do old (RX2) oil coolers have the thermal bypass too?

How necessary would one be with a aftermarket oil cooler?


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