Another vertex ring issue

[powerabout]

Sorry for your piston ring end gap issues , JFYI Ive have GREAT luck with mid grade PRO MARINE pistons if I have a customer that’s gonna “lean” on a motor I send pistons to 300 below in Dicatur Il to be cryogenic treated then to Marles to be top pinned always had good end gap numbers works for me and mine ..
Jayb

Hi Jay
Doesnt sound right, cryo then drill a hole and weld it up after?

[Tagg]

Good to know.

[FMP]

Been in business many years, quality control is a must. I'm sure every batch is sampled , measure each and check any difference. Consider putting the biggest in the big hole, check the rings and do the same if you find a couple longer.

[eli]

Large gaps is for turbocharging and nitrous apps normally aspiration motor ring gap should not be .030 or larger .022 /.025 would be the limit I think every manufacture wants that last .01 for insurance of I put a .030 gap in my snowmobile it would run like I need to purchase new rings. And those are
014 to .016 and run 6000 to 8000 all day

[FMP]

Not if the heat sink into the rings by design closes them more. Vertex likely has changed something, to that the finished bore should be no larger than the ordered upsize, even slightly under if clearance is checked per piston. It could be that they have made an adjustment to prevent the #6 issues and the rest are along for the ride with no issues in their opinion if not over clearanced.
Benefit of the doubt until they give up all details.

[Jay Smith]

Sorry got the time line backwards on the cryogenic and top pinning ...Hell I normally drop ship pistons from Pro Marine directly to Marles , saves on freight.

Jay

[Tagg]

Not if the heat sink into the rings by design closes them more. Vertex likely has changed something, to that the finished bore should be no larger than the ordered upsize, even slightly under if clearance is checked per piston. It could be that they have made an adjustment to prevent the #6 issues and the rest are along for the ride with no issues in their opinion if not over clearanced.
Benefit of the doubt until they give up all details.

This is the second motor I've rebuilt with #6 scuffed up. That's why I didn't whine to my machinist about #6 finishing 2 over.

[FMP]

Going to try for three with what you have now?

[Tagg]

No. I'll just be my dumb self and buy another one that someone else screwed up. That's how I roll.

[FMP]

Only you need to be satisfied with it but I'd try it for a season.
The other play is up all six again and sell the pistons and rings or maybe they'll exchange them all. You could get the desired clearance and gap.
Shiit having to do things twice.

[Tagg]

I called promarine earlier & ordered a single vp piston kit to measure out. They were extremely helpful. Gave me 20% off & free shipping without me asking for anything. Said if the new piston measures out better, they'll take the vertex set back no problem. I'm pleased with their service.

[Tagg]

pro v, not vp.

[FMP]

That's decent, might as well box it all up now.
I'd a gone Wisecos

[Jay Smith]

( Skuffing) Hopefully your breaking in your motors in on petrolium oil not a blend or 100% syn lubes , I learned my lesson on that many many years ago , I breakin on Mercury blue oil . Then great luck with penn. XLF on steel bores, works great for me !!

Good luck ,
832 597 2603
Jay @ JSRE

[eli]

That’s what you told me on the phone last year ,I have my oil purchased ,merc blue and Pennzoil xlf