[C2] Detonation vs Forging marks?
Safety Car
Joined: Oct 2016
Posts: 4,617
Likes: 1,547
From: Olive branch Ms
I have no idea what part of Florida you're from. I don't personally know any engine shops there. Surely there's enough folks here that could tell you where to go and where to avoid. Just looking at their equipment RPMperformance1 in Ft Walton has some nice stuff and usually you don't have equipment that nice unless you have a pretty good idea how to operate it.
Race Director
Joined: Apr 2015
Posts: 17,571
Likes: 3,460
From: Fresno California
I have no idea what part of Florida you're from. I don't personally know any engine shops there. Surely there's enough folks here that could tell you where to go and where to avoid. Just looking at their equipment RPMperformance1 in Ft Walton has some nice stuff and usually you don't have equipment that nice unless you have a pretty good idea how to operate it.
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,835
Likes: 495
From: Florida
Hey you found my house, Damn Google Maps..... I actually drove around looking for that house back then, can't remember if I found it, can't remember a lot of things some days!
This is what I was hoping for. But, I don't have bore gauges, FLAPS doesn't rent them, to accurately check the cylinders so I used the less accurate ring gap check. The #4 cylinder came out more worn than the others so that's why I started to question the detonation marks on the pistons. A machine shop will have to take accurate measurements before we can make that call. Thanks
That scuffing looks pretty light, and it looks like you have little or no ring ridge. I would measure the cylinders for taper and wear and go from there. My '61 had a similar condition with 30%+ leakdown in every cylinder and blowby and oil consuption....the rings were gapped at .044 and worn out, but the cylinders measured out fine. A torque plate hone and new rings and bearings and $700 later I had a rebuilt engine. What I'm saying is that you are absolutely on point freshening/rebuilding your present engine. And it may not need much more than a hone, new pistons/rings/bearings. Easy-Peasy.
Race Director
Joined: Apr 2015
Posts: 17,571
Likes: 3,460
From: Fresno California
If you take it to a good machine shop, they can measure the bores correctly and tell you what you have. If you have to punch it .020" or .030" so be it. You're getting new pistons anyway.
