4mm apex seal
 

4mm would take more detonation then 3 mm would. there is a company already making 4mm abd 4.5mm. they shouldnt wear out housing since its only 1 mm thicker the turbo 3mm seal. what do u think?

i think you think turbo has 2mm is wrong.

All 86 and later rotaries have 2mm seals. Only the 85 and earlier 13b's had 3mm seals. In order to use 4mm seals you would have to substantially mill out the rotors. And honestly, from everything I've read you don't even need to use 3mm seals. Just get 2mm seals and tune it properly. 3mm seals also don't seal as well as 2mm ones, so I hate to think of 4mm seals.

dont the t2 and 93 up come with 3mm seals?

no, 2mm

didnt suzuki or one of the other companies that tried to make a wankel engine use really thick (comparitavely) seals that had rounded edges and sealed just as well?

Apparently something about them didn't work as well, cause mazda was the only one that could get it to run without the fingernails of the devil (chatter marks) showing up.

No, the RE-5 suzuki used 2mm seals IIRC, BUT - it was a single rotor (500cc) P-Port....really cool old bike actually ;) (search the audio/visual section for a GREAT youtube link about the RE-5)

To the orginal poster:

Im not aware of any company currently making anything larger than 3mm seals, but I would think going much larger than 3mm would severly reduce the "meat" left on the rotor which may result in pretty bad ending...but I could be wrong :dunno: I just know that the most common use of 3mm seals is for extremly worn 2mm seal slots.

And as far as resistance to detonation is concerned, the whole idea is to use the rest of the setup to avoid it. Lots of high horespower rotaries use factory mazda seals, they are just tuned really well...thats the key ;)

ya know what? this is ass backwards thinking....

early early 12A's had 6mm carbon apex seals, later 12A's had 3mm steel composite seals, 13B, BT, B RE, BREW and 20B engines all came with 2mm seals. why do you think that is? because tuning and precision manufacturing has come a long ways since the 60's, why are you insistent on proving every engineer since then wrong?

All new apex seals have rounded edges.

Exactly. Why would they start making bigger apex seals when Mazda engineers have made them progressively smaller. It would be one thing if no research and development went into rotaries at all, but you have to think to yourself "Why did Mazda go from 6mm apex seals all the way down to 2mm if 2mm's don't seal as well?" The answer is simple... they do seal as well, if not better. I didn't know they started with 6mm though, that is crazy big.

Naw, it's more of a reverse engineering kinda thing. WHATCHU KNOW ABOUT DAT!

So should I have got 2mm in my gsl-se (two late now) ?????? feel kinda :wallbash:

wasnt that that motorcycle they made long long time ago when the dinosaurs ruled the world?

Its not just sealing but also weight, the reason they got away with 6mm carbons is because they are light, 4mm steal seals would have a redline of like 5000 rpm before they started chattering.