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NYCGPS · 05-09-2012, 07:02 AM

I'm not sure about Groopy and ALS but Mazda seems fine for your Applications.

No Apex seal can survive too much ping, Groopy might wrap instead of breaking like Mazda, but the result is the same --- you lose compression and you need a rebuild.

but if your tuning is safe you don't have to worry too much about that in the first place, all you really need to focus on is the tuning.

You can use 13B-MSP Eshaft and Bearings, they're better and cheaper. no modification is necessary. As for Rotor bearings, you don't need the compeition one unless you are going above 8-9K rpm all the time, stock actually works quite well

for oil pressure, you can just use FD rear and add 2 1/8" shims to the front, then you are set, and much cheaper

05-09-2012, 07:02 AM	#3
NYCGPS The Newbie Join Date: Jan 2010 Posts: 29 Rep Power: 0	I'm not sure about Groopy and ALS but Mazda seems fine for your Applications. No Apex seal can survive too much ping, Groopy might wrap instead of breaking like Mazda, but the result is the same --- you lose compression and you need a rebuild. but if your tuning is safe you don't have to worry too much about that in the first place, all you really need to focus on is the tuning. You can use 13B-MSP Eshaft and Bearings, they're better and cheaper. no modification is necessary. As for Rotor bearings, you don't need the compeition one unless you are going above 8-9K rpm all the time, stock actually works quite well for oil pressure, you can just use FD rear and add 2 1/8" shims to the front, then you are set, and much cheaper