I haven't had any problems with my Ra seals, 14psi and 8500 rpms for 8000 miles. I do unfortunatly have the RA apex seal springs also, which after my motor was assembled and driven I was informed by a few of the Oki boys that they were no good. I'll have the motor apart in a month or two for some upgrades. I'm curious to see what I will find.

The second pic looks good to me! I also don't see any wear grooves on the housing were the apex seal joins it's smaller side piece.

I have an engine running these seals with a tad over 40,000 miles, with zero issues whatsoever.

RA springs also?

Would someone explain to me exactly what is wrong with the RA springs? I did a quick search but didn't spend too much time reading threw all the posts that had the word Spring for RA in them.

From what I heard is they dont hold up to the heat and like to lay down after awhile dropping your compression and causing apex chatter at high rpms, I could be wrong its happened once before that I know of https://www.nopistons.com/forums/pub...1047683329.gif

No.

Not to come off like a jerk or be disagreeable, but I'm still waiting for definitive proof on this. I've heard the rumours but I haven't actually seen a case of it yet. If apex seal springs are failing that easily, it'd be quite easy to spec them out and measure them after an engine has been run extremely hard and then lost compression. I really would like to see some hard data on this before I tell customers to chunk the idea of using RA stuff.



B

You want hard evidence? The people MAKING them said it, well at least about the springs.



kevin.

Fair enough Kevin, but have they actually tested them? Are their own claims true or are they covering their rear-ends in the event that they are true? I'd like to know if they actually got these to fail or not.



B