Can someone please explain to me the Diff between the OEM mazda Seals and the Atkins Seals?? Im about to rebuild my rotary and i wanted to know if i should use OEM or the Atkins seals. I was thinking the Atkins wouldnt be as relaible, but i wanted to double check...

 

Atkins are softer. They will break in faster, and seal better. OEM seals can take more abuse though, especially in highly boosted turbo apps. If you plan on running low to moderate boost, atkins would be fine. But if youre going for big hp numbers and big boost, go OEM. There was some discussion on this at www.nopiston.com in the rotary engine buliding and porting forum.

 

Ya im doing a mild bridgeport and planning on boosting anywhere form 10-16psi... I was going to get OEM seals anyways to be on the safe side... i just wanted to see the diff between them... thanx

 

i agree with these guys

 

one more question because i guess im still somewhat unsure... i plan on putting out 350-400rwhp, bridgeported... so would the Atkins Seals be sufficent for this power?

 

I beleive there is a shortage of OEM apex seals right now, I think madzamotorsports can order them from japan but it takes like 2 months to get them....just fyi

 

ouch.........2 Mo wait

doesnt' rotary aviation make some of their own too?

 

thats ok .... I have ALL winter long to work on this bitch.. I still need a Haltech, T4 turbo, and mics **** to save up for before everythings good to go.. But thanx for the FYI...

 

The corner pieces of stock-type apex seals don't like bridges (that's why you put the rear apex seals in backwards during a secondary bridge).
Go with a 1 piece apex seal for a full bridge.

 

double post!

 

or the new mazda 2pc seals from the rx-8! that is another option that was non existant before! The way these seals are that they are two pice so that the intersection is in the middle so there is no corner pice that will chip away at the rotor housing! and they are desinged to take punishment!

 

If the intersection is in the middle, they will fly out the PP.

 

I stand corrected! it is a one pice seal, EVEN BETTER! still works for our cars!

 

No its not.
Even the pic you posted has it split on the left.

 

it looks like there is a corner piece off the right in the pic. Am i imagining things.

 

are you certain! I was told that the rx-8's Renesis Engine had either a 1pice or two pice seal, that was desinged so that it would not chew up the rotor housings! I could have been misinformed, could sombody elaborate as to what type of Apex Seal that the Rx-8 uses? Is it better than out stock 2pc or not?

 

ok I did some searching and the mazda RX-8 Seals are 2pc, however they are listed as different dymensions, they will not work in our engines without changing out the rotors. Which sux! sorry for any confusion I may have caused! I was misinformed!

 

I was under the impression it was a two-piece seal that was "shorter" than all of the other seals. This gives it a lighter weight to prevent chatter at the higher rpms.
The shoter design means it won't fit right into our rotors, and the nex rotor would have to be milled to accept the old rotors. Regardless, the new seals are untested with PP exhaust, and only speculation exists if they will support it.

 

Someone recomended these... Anyone use these before? or hear anyhting good/bad about them??

http://www.rotaryaviation.com/2_mm_apex_seals.htm

heat treated alloy apex seals. These seals offer 700% more bending strength and are 85% harder than the current after market competitors (Atkins and Hurley).

 

anyone?

 

Check the rotary performance subforum. I have posted in there in the 'Poll: best apex seals" thread about them.
I like them.

 

I'll be going with Atkins seals for my rebuild since I will be reusing my old rotor housings. Also, the Atkins seal wreck less havoc on the housings when they blow than what OEM seals what do.

Of course, the best IMHO, is OEM seals.

 

why build your motor to be easier on it when it blows.. build it so it wont blow

 

Is he talking about apex or corner seals? any difference there betweeen the solid and the 2-piece oem?

 

If he is me, than I am talking about the side piece of the apex seals. I only use stock corner seals with FD springs. I am yet to break a stock corner seal from excessive horsepower, but you can't say I'm not trying.