Racetec can build anything you need at a good price... I like dealing with the guys that build the parts not just resellers like Summit/ Jegs, etc. Give em a call.

What top ring gap were you running?
Ive pulled ring lands off like that when i have messed up the ring gap and had it too tight

racetec pistons use a smaller metric ring stack..

KB hypereutectic required larger top ring gap...

I honestly can't remember as I built this 10 years ago. I do know I ground them to KB spec but can't remember the exact gap.

Would a stiffer spring really help? I've never heard of that coming into play but I don't claim to know everything. I am replacing the springs, and heads for that matter. I've got a pair of aerohead reman heads with 2.02s and .509 lift springs that will be going on this time around. I've also got a MP 292 .508 purple shaft that's going in too.

You butted the rings which blew the ring land off. Your end gap must have been correct or close to run 25,000 miles though. You were running hot with borderline fuel or just didn't lift when it was rattling. Was your top ring @ .026-.028"?

You won't beat the Mahle's with their tighter than normal clearances for a forging. J.Rob

.


You hit the nail on the head, on the way to the track we got off the e-way and the truck was HOT I got on the throttle to blow the carbon out after the extended cruise, it rattled and I didn't lift as quick as I normally do. I'm sure that's when the I poped that chunk loose. I should have known it would rattle after the hour or so of 70 mph at 34-3700rpm. Live and learn I guess.

My experience with those pistons is they can be a great budget piston but need a pretty big ring gap. And if you set the gap for street it aint gonna be suitable for towing or nitrous at a later date. If you set them big for extra load like drag then when your street driving the gap is a bit big and blow by goes up. Compared to normal pistons the extra load gives far greater ring growth than other piston designs.

Well, the DSS pistons are forged and machined in St. Charles, IL. It's an interesting little company from the website.
Looks like they've been more in the road racing arena.

$329 per set for an entry level forged piston is a smokin' deal. Probably mainly ford and SBC applications at that price point. 4032 alloy is the lower expansion alloy.

R.