Subaru Enthusiasts Car Club of the Sierras - View Single Post

sperry · 2009-01-16, 06:01 PM

Apparently, those ports on the oil pump will not work for an oil cooler. I thought they'd make for a nice simple and clean cooler install, but apparently that's not what they're for. What they're actually for, I've got no clue.

A broken ring-land is pretty much the "normal" failure for these motors. That's what killed the original EJ257 I got on the dyno over at S-Squared... but that was due to running lean 'cause of a lack of fuel pressure. And usually the piston goes because of detonation. My issues with spun bearings was mostly because I would let the oil temps go sky high... some of that was poor oil breather/cooler setup, but a lot of that was because I'd ignore the oil temp gauge and run "just one more lap" and put retard wear on my bearings eventually leading to their failure.

Was there any chance of a FP drop due to fuel slosh in the tank? Or perhaps a burst of oil getting into the intake via the breathers? Anything to limit the amount of fuel and/or lower the octane significantly and quickly can cause detonation faster than the knock sensor can correct for, and will pop a piston. And of course, overboost will do a number on the motor... if you were having WG issues, that would be a likely guess. Even if you fixed the WGDC, it may not have been enough for the partial throttle condition that the car would only see like once per lap.

Also, have you ever run at sea-level at colder winter temps? Any idea what your AFR's and EGT's were?

2009-01-16, 06:01 PM	#7
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	Apparently, those ports on the oil pump will not work for an oil cooler. I thought they'd make for a nice simple and clean cooler install, but apparently that's not what they're for. What they're actually for, I've got no clue. A broken ring-land is pretty much the "normal" failure for these motors. That's what killed the original EJ257 I got on the dyno over at S-Squared... but that was due to running lean 'cause of a lack of fuel pressure. And usually the piston goes because of detonation. My issues with spun bearings was mostly because I would let the oil temps go sky high... some of that was poor oil breather/cooler setup, but a lot of that was because I'd ignore the oil temp gauge and run "just one more lap" and put retard wear on my bearings eventually leading to their failure. Was there any chance of a FP drop due to fuel slosh in the tank? Or perhaps a burst of oil getting into the intake via the breathers? Anything to limit the amount of fuel and/or lower the octane significantly and quickly can cause detonation faster than the knock sensor can correct for, and will pop a piston. And of course, overboost will do a number on the motor... if you were having WG issues, that would be a likely guess. Even if you fixed the WGDC, it may not have been enough for the partial throttle condition that the car would only see like once per lap. Also, have you ever run at sea-level at colder winter temps? Any idea what your AFR's and EGT's were? __________________ Is you is, or is you ain't, my con-stit-u-ints?