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Old 10-06-2012, 09:56 PM   #351
speedyHAM
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Tore the engine down today and found a few problems. The first part that looked like a big problem was the cam-



I have no idea how that could happen. If you don't see it, look at the upper cam, left side.

That obviously didn't cause the engine to seize so we kept on going.



As Jaime from Mythbusters put it- well there's your problem!





The bearings were also pretty well extruded on 3 of four cylinders, but that probably happened after the rods bent and before I got the car off course and stopped.



So the good news is that the heads are fine, the block is fine, and the crank will probably be just fine after some polishing and balancing.
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Old 10-06-2012, 10:23 PM   #352
Scooby South
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time for a 2.5 stroker with some GST cams..

At least now you have a good project for the winter..

Bill
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Old 10-06-2012, 10:29 PM   #353
gurusan
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Ouch. Good excuse for a new set of cams
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Old 10-06-2012, 11:17 PM   #354
Storm
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Wow.....I can't think of any possible reason why the cam would break there.....

That rod needs to be displayed proudly!

Jay
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Old 10-09-2012, 01:56 AM   #355
speedyHAM
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Quote:
Originally Posted by Storm View Post
Wow.....I can't think of any possible reason why the cam would break there.....

That rod needs to be displayed proudly!

Jay
Yeah, the cam is really puzzling to me. I'm thinking it was a casting flaw that 8200 rpm agitated and let loose, but who knows how long ago that was?

The rod is making a tour of my office (a bunch of structural engineers) and then will have a place of honor in my garage for all time, next to my first input shaft missing it's 2nd gear teeth.
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Old 10-19-2012, 10:02 AM   #356
penderperson
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Any updates? Spill the beans on the new power!
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Old 10-20-2012, 12:24 AM   #357
speedyHAM
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This rebuild is going to take a while. At least for the rest of the winter I'll be working on the new engine. After that, there are quite a few other parts I've been wanting to make, so I am taking a little time off from autoX to improve the rest of the car at the same time. I'll make sure to provide updates when something interesting happens, but it's going to be a few months at the least.
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Old 10-20-2012, 03:28 PM   #358
Patrick L
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Quote:
Originally Posted by Scooby South View Post
time for a 2.5 stroker with some GST cams..

At least now you have a good project for the winter..

Bill
Probably not, weight penalty.
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Old 10-20-2012, 03:28 PM   #359
Patrick L
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Quote:
Originally Posted by speedyHAM View Post
This rebuild is going to take a while. At least for the rest of the winter I'll be working on the new engine. After that, there are quite a few other parts I've been wanting to make, so I am taking a little time off from autoX to improve the rest of the car at the same time. I'll make sure to provide updates when something interesting happens, but it's going to be a few months at the least.
You thinking about what Jay and I was talked about?
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Old 10-20-2012, 06:48 PM   #360
speedyHAM
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You thinking about what Jay and I was talked about?
Heck yeah.

Along with a few more things to improve the weight and suspension geometry.
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Old 10-22-2012, 09:55 PM   #361
Storm
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Muhahahahaha....... Have fun Sean! Who knows, I may take your place in the class while you're rebuilding!


Jay
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Old 10-23-2012, 01:43 PM   #362
BAN SUVS
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0_o Jay, cut me in the loop. I haven't given up on my FP region dominator yet!
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