[sperry]

Here's a copy of the thread I started on NASIOC... anyone here have some suggestions?

http://forums.nasioc.com/forums/show...php?p=20496591

Originally Posted by sperry's NASIOC thread

Two problems... one the filter came loose on track and sucked up a bunch of grit... enough to make the turbo look like this:



All that crap in the motor seems to have left some nice scoring on the cylinders:

Cyl 1:

http://www.seccs.org/gallery/Car%20P...ders/cyl1a.JPG
http://www.seccs.org/gallery/Car%20P...ders/cyl1b.JPG

Cyl 2:
http://www.seccs.org/gallery/Car%20P...ders/cyl2a.JPG
http://www.seccs.org/gallery/Car%20P...ders/cyl2b.JPG

Cyl 3:
http://www.seccs.org/gallery/Car%20P...ders/cyl3a.JPG
http://www.seccs.org/gallery/Car%20P...ders/cyl3b.JPG

Cyl 4:
http://www.seccs.org/gallery/Car%20P...ders/cyl4a.JPG
http://www.seccs.org/gallery/Car%20P...ders/cyl4b.JPG

Cylinders 1 and 3 seem the worst. You can just barely feel the scoring with your finger. 2 and 4 you can see the lines, but they still feel smooth.

Here's the #1 piston, the other 3 are in identical shape:


http://www.seccs.org/gallery/Car%20P...s/piston1a.JPG
http://www.seccs.org/gallery/Car%20P...s/piston1b.JPG
http://www.seccs.org/gallery/Car%20P...s/piston1c.JPG
http://www.seccs.org/gallery/Car%20P...s/piston1d.JPG
http://www.seccs.org/gallery/Car%20P...s/piston1e.JPG
http://www.seccs.org/gallery/Car%20P...s/piston1f.JPG


Additionally in an unrelated issue (oil starvation) I lost a bearing on rod #3, (which is why I ended up tearing the motor down):


http://www.seccs.org/gallery/Car%20P...ders/rod3a.JPG
http://www.seccs.org/gallery/Car%20P...ders/rod3b.JPG
http://www.seccs.org/gallery/Car%20P...ders/rod3c.JPG


http://www.seccs.org/gallery/Car%20P...rs/crank3a.JPG
http://www.seccs.org/gallery/Car%20P...rs/crank3b.JPG
http://www.seccs.org/gallery/Car%20P...rs/crank3c.JPG
http://www.seccs.org/gallery/Car%20P...rs/crank3d.JPG
http://www.seccs.org/gallery/Car%20P...rs/crank3e.JPG
http://www.seccs.org/gallery/Car%20P...rs/crank3f.JPG
http://www.seccs.org/gallery/Car%20P...rs/crank3g.JPG


Here's the crappy part: The motor has only about 1500 miles on it since the last rebuild... which included boring to 100mm. So, without sleeving the block, I can't bore it again, plus the pistons are brand stinking new coated JE forged pistons. Will I be able to simply hone the block and install new rings? Granted it'll be a bit of a "loose" motor, but that's not terrible since it's a time trials car and I've got a big old vent to atmosphere oil breather can, so a bit of blow-by isn't the end of the world.

The other issue is whether or not the crank is toast. I guess I could have it machined and run some oversized rod bearings, but with all this machine work I'm wondering if it would just be cheaper and better to pick up a new shortblock. My back up plan was just to get a Cobb tuner block w/ forged pistons, but they went and stopped selling them.

So... anyone got some advice for getting this thing back together or any recommendations for picking up a new lightly built shortblock (forged pistons and race bearings)?

Thanks in advanced.