Re: Found the problem

just a thought for you guys street guys. Gm had knock sensors in their blocks that took the place of a freeze plug and sent the signal to the computer to pull back timing or whatever.

I wonder if a guy couldn't install one and wire it to a light such as those utilized for line - locks, detonation is a serious killer and like high blood pressure in humans it is often silent until the damage is done. When I ran dynos for OEM work one of the engineers used to constantly preach to me that by the time you hear your engine detonating, the damage has been done to some degree.

Now, I don't know all that transpired in Paul's engine but other than not being a fan of K-B hyper's I would suspect a certain amount of detonation took place.

For those willing to try my suggestion, go to the GM dealer and order one from an 87 or 88 Corvette, these are the ones I would try, there might be other applications for these, I just know about these particular ones from my time building Calloway Corvettes. See, other than GM's EOS, there is something else useful that comes out of their parts department.

At any rate, in my opinion, anything other than a complete and total tear down and hot tanking of this engine is only inviting another disaster.

Good Luck,

Joey

On Sat, Nov 9, 2013 at 12:14 PM, Paul L. http://1962to1965mopar.ornocar.org/ml-lennemann63.html <pjlenn@xxxxxxxxx> wrote:

That's a good suggestion Jim. I have confidence in the machinist. He's been in business for a long time and builds a fair number of racing engines including his own. He knows Mopars too. We had a conversation about file fit on the rings and the KB spec. So I'm sure that was done correctly. I did run some 89 octane mixed with some 91 this summer and got a little detonation on one occasion. So it may have been my fault.

Paul L.

On Thursday, November 7, 2013 6:53:57 PM UTC-6, Paul L. http://1962to1965mopar.ornocar.org/ml-lennemann63.html wrote:

To recap for everyone: On the eve of the Geezer Drags I drove my car to Rich K's house to socialize a little. The engine started to miss, which was pinpointed to #4 cyl. Discovered that the neg. electrode had been hit by something and bent over. There was also a bit of a noise in the engine.
Since I am now retired as of last week, I took time today to pull the head off. Discovered that about 1.5" of the top ring land had broken off of the piston. So looks like the engine is coming out. This is disappointing in that I probably only have about 1500 miles on a fresh rebuild. And it has only seen 5K rpm a hand full of times in that time. The pistons were new KB Hyper-eutectic's.

Somewhat surprisingly there was no debris left in the cyl., and no apparent damage to the head. Still need to check the make sure that the valve seats are not damaged. I'm attaching a picture.

Paul L.
63 Sport Fury
440/727

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