BATMAN

My engine was rebuilt with 2mm RA seals.

Starts up perfect after 7k miles on it.

IAN

iTrader: (3)

Went to the mazda dealer. $58cdn each plus tax for mazdee apex seal's and these are two piece. ($46 with discount) They still list the three piece as unavailable. Seems to me that the RA is a good price. Just hope they are perfect.

Ian

Fatman0203

Exactly I see the 3 piece as still unvailable unless everyone is ordering them so fast that their unavailable.

Maxthe7man

Just order the new number, you will get 3 peice seals...Max

Mr rx-7 tt

iTrader: (5)

What's the new number?

RETed

It's actually the old number.
N351-11-C00C


-Ted

rexman13b

iTrader: (7)

hey max, how many miles on your new engine with the RA seals?

nyt

iTrader: (1)

I just ordered the c00c seals recently. I did NOT get 3 piece.

Maxthe7man

Zero!..... Its been running in the garage for a couple of hours though, I recently ran out of fuel tuning the primaries, and the idle etc, Its in the midst of winter here so I am only going to take it out if really dries up...There's alot of experminents on the car this time, so I am probably gonna take awhile to get her on the road, I have a transmission to change..
The motor is half bridge, its making 10-12" of vac, just like last time, it starts right off... Time will tell when we hit the dyno in a little bit..Max

luiml73

iTrader: (1)

hey Kabooski,

I think I read somewhere that you went back to the stock turbo. Is this true?
If so, may I ask why.

Also, What happened to the last motor? I figure you still have the LT8 and Rolo is still tunning.

Thanks



I'll be ordering these RA seals myself for my backup motor

kabooski

a bit of update I quess is need'd eh

I now have close to 1k on this motor
The Hybrid was smoking so I sold it
and got a New Turbo Kit

I do my own tunning now
I cracked a plate on my last motor and one front apex seal
cuase the A/F was only good for race gas

I now run pump (93) on 11.4-11.2 A/F same boost levels 14-15PSI with no isssues
the A/F's where in the 11.7-11.8 on the last motor
aslo changed the timming maps a bit

So far the RA seals are awesome
no hot start probelms at all
even after doing Numerous pass's down the 1/4



ran 11.8@119 this pass sunday (on DR's) (1.84 60' foot)
would of ran 11.6 on one pass but I miss shifted (1.71 60')

I'll soon run 22 PSI
It's 10's next year or bust

patman

iTrader: (3)

i'll add my .02:

i have the stamped RA 2mm 2piece seals. got them in jan. 04 IIRC.
these are in an aggressively street ported, 9.4:1 compression turbo engine. stock turbo, 10 psi.

i have about 12k miles on mine now. they still seal fine, car runs great. havent tested compression recently, but i will sometime soon and post it up, i know its fine by the way it runs. will hold a 500 rpm idle no problem.

i DID abuse the **** out of mine: short (600 mile) break in, 5k on stock ECU, then an accidental overboost to 14 psi due to a wastegate issue. this was on stock injectors with a roughly tuned LT8. got detonation so bad the seals were audibly rattling, didnt hurt them a bit.

in short, as far as i can tell, the later batches of RA seals are all they claim to be. RWS treated me well, and their kit will be in my next engine.


ted, from back in the first couple pages, i disagree about the longer end piece of the apex:

the longer piece saves you from wear on the end of the rotorhousing, which is where you always see chrome flaking. it does not decrease compression as it expands any more than a stock one would. the slope of the interface is the same, so it moves outward vs upward at the same rate as a stock one, and the fact that it is longer doesnt have any bearing on anything. i know what you are thinking: its longer so the place area of the 'crack' between the seal and the housing surface would be larger, but I think this is really a non-issue. there is enough room for the seal to expand without going 'upward', just like stock, and also, even if it were to happen, the length difference is not that much, so the area difference would be minimal too.

pat

PS that is a DAMN sweet first gen!!

Silver7

I have the same "stamped" set purchased around the same time (Jan 04). So far I have 1K miles on the motor and I haven't seen any problems yet. I've been running approx 12 psi. I am about to turn up the boost to around 15-17 psi and do some tuning and dyno runs. I'll report any problems but I don't forsee any.

BATMAN

What were these "problems" that some people "experienced?"

BDC

I just got a set of RA apex seals for a customer's engine build and they are not stamped.

B

rzograbian

they dont stamp them anymore now because they are all exactly the same dimensions... i callled them and asked because mine was stamped (01/04) and my firends car that we just started up today for the first time werent...... we didnt have an issue with the seals yet... ill keep you guy's informed if we do but i havent in a year!!

Syonyk

Well, I'm not doing anything hard on them (S4 NA), but I have 8000 miles on the seals and they seem to be working just fine - car starts easily, runs strong. I really should get some compression/vacuum numbers, since everything is well broken in by now.

-=Russ=-

AImec Racing

looks like RAs are doing well. My engine still in pieces. I just did leak test on rorots and found that one of them is leaking (the one of the stupid tiny OEM corner seal inserted). So now I loss a housing and a rotor. So FYI I need 2 rotors in case you were I can find them... let me know.

PD
RX-8 seals still in good shape so far in the 650 whp 13b I told you once. RAs in my friend's FD still perfect w/23 psi of boost.

AImec Racing

hey MAX?

where you been?

how's going?

luiml73

iTrader: (1)

My friend just called and said he had low compression, so he decided to open the engine. He says his housing are scratched. We are going to my friends shop tomorrow to measure everything and take pics.

He is going to join the forum and open a new thread with all the info.

CAR

1987 Turbo2
RB exhaust
stock ECU
3k miles on rebuild
New housings
RA seals new batch

He says he never took the car passed 6k rpm. He sounded pretty pissed!!

rzograbian

my firend is having that sort of a problem too. the car is still smoking at startup. its raw fuel. its a 3rd gen and the front rotor has ok compression but the rear is 60... WTF.... the car has been started and idle'd for 20 minutes numerous times. the car has not yet been driven though. (except back and forth) will it build better compression when driven with load???

we are going to do another compression check and post it here. btw, he has the new non stamped set and i have about 8k on my new streetported motor and just did a compression test. i have 93 psi on both rotors... i guess they do break in late but it should be a bit higher....

AImec Racing

ok... hopefully nothing to do w/seals (I hope!) I'm about to break-in this week. Will religiously not pass 4500 rpms for 1000 miles to delete that variable. I'll keep you informed. BTW... do not open a new thread, just keep posting here...

t-von

iTrader: (8)

Did your friend also use the supplied RA springs or reuse the stock ones?

RETed

Reuse the old ones or replace them with brand new Mazda OEM units?


-Ted

t-von

iTrader: (8)

Oooops I meant replace with factory stock ones not reuse the old ones.