Which would you prefer and why? what about stock mazda apex seals vs aftermarket 2 peicers. which lasts the long haul?

i'm using stock 2mm they seal the best and can handle up to 30psi ............ https://www.nopistons.com/forums/pub...DIR#>/wink.png

stock 2mm, the 3mm seals dont like high revs (8000+)



mike

3mm chatter...

Go with stock Mazda 2mm seals and use the rest of the money to apply toward a wideband and learn how to tune.



BTW - some of you guys might not believe this but I talked to a guy that builds engines in FL that has a 8.xx 1/4 mile dragster and he was running 40ish psi of boost ON THE STOCK MAZDA 2mm SEALS!!!!!! Thats some crazy ****......I have no idea how long they lasted but I'm sure he would have switched to something else if it wasnt working good.



STEPHEN

pepe loco's 2rotor made 700rwhp with N20 on the dyno. stock mazda seals. good enough for me !

Only go 3mm if you have cash to burn. https://www.nopistons.com/forums/pub...DIR#>/moon.gif



Seriously, go with 3mm if you do a rebuild and this is the only way to reuse the rotors. If you are experiencing detonation, then you have it tuned poorly. Dyno time with a wideband is cheap enough once you consider rebuild costs. How much more proof does there have to be to show that the stock apex seals are the shiznit with proper tuning.

So the stockers can handle the boost but what RPM are they good for?

I agree. Stock seals are the eay to go. Ray Wilson putdown 643 hp and runs 30 psi on stock seals.

My wimpy 12-13 psi ain't gonna break 'em.

i would have to say the stock ones work fine until they get to the point where they wear through to the center where the peice is split and then they fail miserably and ruin you're engine, thats why i prefer the 2 peicers over the stock ones, i know a guy that runs 45psi on them....3mm apex seals are totally pointless.

12psi~13psi can break them. Run a bit lean and it doesn't matter if you have 5psi or 25psi. You'll get some damage either way. It's all in the tuning.

Good info people!

the main point here is don't go lean and you will never break an apex seal unless you put like 100k miles on it and you wear out the seal so bad it won't hold compression anymore :bigok:

Duh really? You failed to see my point.

A lean A/F will break a 3 mmm seal also.

Stock seals are perfectly fine for higher boost levels.



I didn't feel the need to point out the obvious, yes you need to be tunned correctly.

Umm, you failed to see my point. I was agreeing with you. I've always felt that 2mm stock pieces were the way to go. I've seen engines pop on less pressure. It's always bad tuning. The stock seals consistantly prove themselves worthy.



And yes you need to point out the obvious. Too many people tune their stuff with the butt-o-meter. Why? Because the engine gnomes (close relative of the underpants gnomes) don't immediately hop out of the vents and start pistol whipping the dude with a quickness before something goes pop. https://www.nopistons.com/forums/pub...>/blackeye.gif Many times I've heard that an engine felt stronger than it ever was right before it pops. Piston or rotary. Running lean can fool people because it feels pretty good.







Soooooo, survey says - stock seals!

jerk racer and fd3boost are correct..... if you try and guess your destined for DISASTER https://www.nopistons.com/forums/pub...R#>/violin.gif

that is what dyno's are for! :bigthumg: