I am interested in upgrading my 3rd gen and I here a lot about the apex seals going under high boost applications. I ve looked into 3mm apex seals to hold the boost but after reading some kill stories it seems like after some hard running of the car they seem to break a lot. What information can you give to someone who is new to the rotary engine?

fuel is really the key, not boost.

If the engine leans out too much, you'll get pre-ignition, which is the root of the apex failures. Also, older seals tend to break down and get weak in my experience, so be expecting to replace the motor every 60,000 miles anyway. If you were to do things like a fuel pump, intake, intercooler, downpipe and catback, and an aftermarket tuned ECU, you should be able to hold 14.7 PSI no problem. I'm pushing 15 (max) on the stock motor with the above upgrades (minus the intercooler) installed.

indeed fuel plays a very big part, the other is who builds the engine. I've seen 20psi and more on some daily driver FD's

You just have to do it right

And nobody mentions TUNNING???





that seems to be the most important part! Solid tunning is key!

1 entry found for tunning.

tunning



Tun \Tun\, v. i. [imp. & p. p. Tunned; p. pr. & vb. n. Tunning.] To put into tuns, or casks. --Boyle.

I usually do my tunning around thanksgiving, so much food, so little time....

there used to be a mazda tech bulletin that was floating around the other forum that stated the stock mazda seals could hold 35-40psi of boost before they started "floating." So the apex seals holding the boost arent really the issue, but like others said it boils down to fuel, tuning, and who builds the motor.