Pistons
I’ll tell you Dan, the biggest issue I have with any KB piston is the garbage 5/64 ring pack.
I can’t think of a single scenario where those thick tractor rings would be better and I can’t think of one.
In my world any piston made today would have no thicker ring than .043 and it could be made even more simple if they just used a 1 mm ring.
Other than it’s about all you can get IMO a 1/16 ring pack is obsolete as well.
Thick rings eat power, cause more heat and don’t seal worth a crap.
I'm gonna have to respectfully disagree with the first sentence and with the last sentence.
Here's my experience, with that so-called, "garbage 5/64 ring-pack"
As to power;
My 367 has gone 93 in Eighth, at 3457 pounds, at 900 ft elevation, which the Wallace estimates is 430 hp.
As to heat:
and she runs the exact same temperature, no matter how many runs I make back-to back.
as to Not sealing
On the day I put them in, I couldn't measure any leakdown at all. In one particular combo, the pressure went to 195psi.
I've got over 100,000 miles on those rings now.
Bonus
I got up to 32 mpg on a certain day trip on those rings.
They may be garbage, IDK.
But I'd buy them again, without even thinking about it.