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MacGyver · 05-07-2012, 07:10 AM

Hi guys. I'm looking to build a new engine for higher power output with a goal of 400HP on pump gas. This will be a daily driven engine, it may see an autocross one day but not often. The parts I need help with are

Apex Seals:
I've looked at 2 piece Mazda, Goopy and ALS. The Mazda have proven wear characteristics. The Goopy and ALS are regarded as great for high power applications and resistance to detonation events. Does anyone have any feedback on Goopy or ALS seal housing wear characteristics?

Stationary and Rotor bearings:
The engine I'm rebuilding has excellent condition stock bearings but I'm unsure how they will hold up in the long run at elevated power levels. Either way I will be using a Racing Beat high pressure regulator and machining a groove for an o-ring between the pump body and front iron. I'll be keeping the stock ball and spring eshaft jet as well. Additionally I (need help with) was thinking RX-8 gears/bearings and Mazdatrix competition rotor bearings along with reaming the oil passages to 3/8". Plan is to keep the redline the same. Thoughts on whether is a worthwhile mod or waste of money?

Appreciate an feedback you guys can give.

05-07-2012, 07:10 AM	#1
MacGyver The Newbie Join Date: May 2010 Posts: 3 Rep Power: 0	Help me choose apex seals and bearings Hi guys. I'm looking to build a new engine for higher power output with a goal of 400HP on pump gas. This will be a daily driven engine, it may see an autocross one day but not often. The parts I need help with are Apex Seals: I've looked at 2 piece Mazda, Goopy and ALS. The Mazda have proven wear characteristics. The Goopy and ALS are regarded as great for high power applications and resistance to detonation events. Does anyone have any feedback on Goopy or ALS seal housing wear characteristics? Stationary and Rotor bearings: The engine I'm rebuilding has excellent condition stock bearings but I'm unsure how they will hold up in the long run at elevated power levels. Either way I will be using a Racing Beat high pressure regulator and machining a groove for an o-ring between the pump body and front iron. I'll be keeping the stock ball and spring eshaft jet as well. Additionally I (need help with) was thinking RX-8 gears/bearings and Mazdatrix competition rotor bearings along with reaming the oil passages to 3/8". Plan is to keep the redline the same. Thoughts on whether is a worthwhile mod or waste of money? Appreciate an feedback you guys can give.