Okay, okay, the fog in my head is getting thicker. I need some racer tape around my head before it explodes!
There are 2 rear oil pressure regulators listed on the Mazdaspeed site with the same identical description, but yet different part numbers:
4801-14-250
4352-14-250
"Replaces the stock secondary (rear) regulator. With the use of a high capacity oil pump, the competition regulator allows oil pressure in the system to reach 105-115 psi. It is recommended to also shim the front regulator 1/8' to ensure that it does not limit system pressure."
And then they further add:
"A less expensive alternative is to use the 3rd gen regulator, N3A1-14-230 which allows 90-100 psi."
So what's the hot ticket? If I am running a turbo oil pump, do I simply run the 3rd gen regulator, or the Mazdaspeed piece? If the Mazdaspeed is the ticket, then which one?
I'm heading to the garage for some racer's tape........which color works best on exploding heads?
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If you have a stock rebuild with regular apex seals the 3rd gen regulator is fine. If you go with ceramics and plan to spin it real tight then go with the comp piece. If price is the same go with the comp unit. Mazda has the old comp catalog available in pdf form now with some tips that could help you. Pull the 6 port sleeves and toss them. PM me if you want a few more suggestions.
Steve Eckerich
ITS 18 Speedsource RX7
ITR RX8 (under construction)
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