Any Updates WaachBack?

 

Yeah, but my computer power supply blew, so I am unable to post pics until it is fixed. I am posting from my work computer.

I can say this though, my map sensor line flew off under 18psi on a 11.5 1/4 drag pass. Long story short, I blew ALL corner seals and 1 side seal in my front rotor. The RA super seals were in perfect condition and I will be using them again when I rebuild the engine.

 

what about the condition of the housings?

 

The housing was fine. It looked like the same pre explosion.

 

The only company that can produce a better seal then Mazda is... Mazda.

 

If I had been using Mazda OEM seals when my map sensor line flew off and caused my motor to blow, I would be in for $1k+. Not the measy $300 I spent to replace the soft seals and corner seals in my motor. My RA Seals are still in perfect condition along with all my other engine parts.

Mazda seals destroy housings, irons, rotors and turbos when they explode.

RA and ALS seals do not. These 2 facts has been proven by many people and with many motors.

 

RA's seals break into pieces under detonation just like Mazda's

 

My current engine producing just over 700rwhp on pump fuel.


Has 3 E&J seals in it and 3 RA classic seals in it. Engine still perfect. Will give you an update as it goes. I have always found the above 2 to be very close, but all in all an excellent seal.

If you detonate an engine it will break, regardless of what seal you have. So lets not kid our selves. Some seals go in a bad way, some dont. I have a NRS 3mm set here in alot of pieces. I have a set of 3mm ra seals here that copped major lean outs, detonation, and they simply bowed(the rotors also dimpled completely and were rubbish). So one way or another, if the apex seal dosnt cop it, something else will. TUNE HAS TO BE GOOD and CONSISTENT.

 

Have you actually built an OEM Mazda seal AND an RA super seal motor, had them detonate and blow, and compared after effects? I have.
I lost 2 irons, 1 rotor, and 1 housing in the OEM Mazda motor. I lost my corner seals and 1 side seal in the RA motor.

Jason of RX7 store has also tried to detonate and break RA seals on purpose. Guess what - they didn't break.

 

Yes. The RA seals do as much (if not more) damage to the internals then Mazda's seals.

 

what do you think are the best seals for 380 hp street ported motor ??

 

Um I don't think you read my post/posts...

 

My computer still isnt running so I cant post pics, but I will confirm that I built a motor last night with the same RA super seals and housings which were still in spec taken from my old motor that blew the corner seals.

 

I think you guys are confusing 2 diff seals. RA (regular) seals do break just like stock Mazda. The RA (superseal) do not break, they will warp.

 

thanks for clearing that up Anthony.

 

I am not, I Pvilknight seems to be though. I use and have been talking about RA Super Seals throughout the whole thread.

 

Just doubled checked my parts. I was thinking of the regular RA seals. I had experience with the older RA seals with the numbers on them to match apex seals to corner seals. I wasn't impressed. I have not had experience with the super seals. Sorry for the mix up.

 

had the super seals in my car at one point, ran it once and I'm guessing the tune wasn't the best and the motor lost compression. All the seals flatened out but no breakage. I do think they probably blew a bit prematurely but I can say they didn't mess up any internal parts. I've got mazda seals now though, never had much problem with em' but next build will be ALS.

 

Yeah, motors dont lose compression for no reason. I doubt it was the RA Seal's fault. I too will be trying ALS seals in my next build. If I ever need one more that is. :P

 

ive been running RA super seals in my TII for about 2 years now, about 15k miles. i am pretty hard on it, autox it regularly and dog it all the time, pushing 10-15 psi on a hybrid, conservative tune, ~300whp. no problems so far.. rx7world rebuild

 

I guess you've been living under a rock for the last few years, to throw out a blanket statement like that. Why don't you find some good ol' 3 piece OEM apex seals and stick them into your engine.

 

Any long term update on the black RA super seals?

 

I'm running them on my personal track/street car, i'd have to check but IIRC there are approx 5k miles on the engine, to include a DGRR trip and two track days.

Not exactly long term, but my engine vacuum has stayed constant since broken in, I plan to check my compression again soon. I'm running the oem OMP along with premixing at 5-10 ounces per tank depending on how I'm using the car--- ie highway cruising vs track event. Typically run 15 psi/430ish rwhp but have been using the 20 psi/490 rwhp setting more often lately

 

Damn I forgot about my old thread. My 91 NA vert has 40k on the original Ra seals. I haven't driven it since May of last year. I just recently fired it up about 3week ago. It fired right up without any hesitation. My OMP doesn't work so it's be 1oz per gallon premix over that time frame. There where also a coupe thousand miles where I didn't even bother to premix. I need to do a compression check though.

 

My s4 T2 engine was probably one of the first to run the RA 2mm Super Seals, way back in early 2006. I've been using that same set of seals since then, for probably a total of 10k miles. Here is the list of the detonation they have withstood over the past 4 years:

December 2006

21psi boost spike on a series 5 stock FC turbo in extremely cold weather. I had an MBC on the car at the time and was in a higher gear. This occurred twice. I heard an audible thunk sound.

July 2008

After upgrading the turbo, I decided to [intentionally] turn the boost up to 21psi on racing fuel. This was on a T04S turbo. A single vacuum hose was not secured properly and blew off the intake plenum. For whatever reason this was bleeding air from the MAP sensor signal but the engine had no other major signs of a leak.

The result was that, during a 21psi 3rd gear pull on the street, AFR leaned out to about 15:1 and timing was excessively advanced by about 7 degrees. When the detonation occurred it felt like I hit a brick wall. The car would barely idle or make much vacuum. Three of my BR10EIX spark plugs cracked but the apex seals were intact. I overhauled the engine after that anyway. Apex seals were reused and spec'd out perfectly. They had about 7000 miles on them max.

March 2010

After overhauling the engine I upgraded the turbo again to a Garrett T04R. I'm running about 16.5-17psi on the street on 93 octane only. It's a bit of a trial-and-error process in terms of what the engine will tolerate for timing. Well for whatever reason the engine decided to detonate one night. It had the "marbles in a can" sound. I pulled 2-3 degrees of timing at full boost and richened up the mixture at lower boost levels during spool. I haven't had any problems since then.