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Old 04-29-2013, 07:46 AM   #1041
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well that's impressive...

Good luck. How deep are the scratches on the wall?
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Old 04-29-2013, 09:38 AM   #1042
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...and replacing the piston too right?
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Old 04-29-2013, 09:51 AM   #1043
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Originally Posted by Braineack View Post
...and replacing the piston too right?
Naw, it'll sand out.
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Old 04-29-2013, 10:05 AM   #1044
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lol I seriously cringed when you text me those pics Bryan

This is why I don't spin any of my econo-built motors past 7k
Or push a gt3076r to 25+ psi

"you're gonna have a bad time"

The up side though is that now it will be completely built and ready to make some nasty power.

I agree with both Bryan and Leo to a certain point. On the one hand plenty of people are making over 300 with stock head/valvetrain by keeping the limiter at 7-7.1, on the other he clearly had failure due to valve float (or so I'm convinced) at high pressure, flow, and rpm, so......
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Old 04-29-2013, 10:47 AM   #1045
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Old 04-29-2013, 01:20 PM   #1046
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...and replacing the piston too right?
lol ...this is a joke right? That will clearly buff out.. I have this amazing rubbing compound.
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Old 04-29-2013, 01:20 PM   #1047
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it'll buff out
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Old 04-29-2013, 01:27 PM   #1048
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Well you already have a broken con rod keychain, what are you going to do with the valve?
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Old 04-29-2013, 01:39 PM   #1049
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make a necklace out of all the borked internals
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Old 04-29-2013, 01:58 PM   #1050
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Well you already have a broken con rod keychain, what are you going to do with the valve?
Already drilled a hole in it. It will be polished and added to my keys
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Old 04-30-2013, 01:25 AM   #1051
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On the up side - she looks sexy even all blowed up.

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Old 04-30-2013, 10:40 AM   #1052
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Quote:
Originally Posted by 18psi View Post
I agree with both Bryan and Leo to a certain point. On the one hand plenty of people are making over 300 with stock head/valvetrain by keeping the limiter at 7-7.1, on the other he clearly had failure due to valve float (or so I'm convinced) at high pressure, flow, and rpm, so......
I think the NBs are more susceptable considering they have a weeker valvespring than NAs.
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Old 04-30-2013, 10:12 PM   #1053
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Oo I wonder who might have taken this photo? Great shot!
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Old 04-30-2013, 10:28 PM   #1054
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It looks like the valve got crushed facing vertically at some point. You can see witness marks on the head and the piston in the same spot. Think it'd be enough to bend an h beam?
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Old 05-01-2013, 02:44 PM   #1055
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How did it sound? I know when I wrecked 3rd gear, **** was clunky and then LOUD AS HELL for about 5 minutes until all the teeth on 3rd broke off.
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Old 05-14-2013, 04:05 PM   #1056
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So after seeing that piston in person yesterday all i can say is pictures dont do it any justice, seriously impressive amount of damage. good luck on that rebuild bryan
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Old 05-15-2013, 11:36 AM   #1057
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News:
Picked up a new 2003 cylinder head. It was in great shape to start with but I quickly gutted it and had it decked and a valve job done. Then I installed the Supertech goodies – Dual springs, titanium retainers and valves. Now she’s sitting there waiting for the coolant reroute material and to assemble the rest.



Ordered custom head gasket – Thicker .060” mil and a replacement CP piston. There was damage to the other 3 pistons but not anywhere near the way this guy looks:



It also turned out that my block was basically junk. After dropping the piston number 4 out I noticed some rather large dents in the walls.. Not worth trying to repair and even going a couple sizes larger in piston would likely not solve my problem. So.. SQUARE ONE.

I picked up a bare block and dropped it off at my machine shop.. They are going to give me feedback on the 3 pistons that have seen some damage and I’ll go from there.

If the other pistons are junk I’ll likely return the one piston that matches and bore it over as large as I can get away with. Not the best way to make power but I’ll be able to get away with better clearances and have more surface area on the walls…

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Old 05-15-2013, 02:50 PM   #1058
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I wouldn't re-use any of the pistons

If you're starting back from square one, and spending all this money, skimping on and re-using pistons with damage on them is asking for trouble
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Old 05-15-2013, 02:56 PM   #1059
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Quote:
Originally Posted by 18psi View Post
I wouldn't re-use any of the pistons

If you're starting back from square one, and spending all this money, skimping on and re-using pistons with damage on them is asking for trouble
Well if they were in good shape there is no reason to replace them. It's not like I'm using the same rings.
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Old 05-15-2013, 02:57 PM   #1060
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Originally Posted by Dem768 View Post
There was damage to the other 3 pistons but not anywhere near the way this guy looks:
.
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