mikeferz42

this is my first rotary and searched for egr valve or egr and came up with nothing. does this car have no egr valve? i highly doubt this since it is available in the u.s. the reason why i'm asking is because i'm thinking for high flow cats and back pressure and adding a high flow cat might cause failed smogs down the road, (residing in CA).

two rotors

There is no EGR valve.It is not required because NOx emissions are low on rotary engines and are easily handled by the catalytic converter.
High flow cats on 2nd and 3rd gen cars were OK for passing emissions,don't know about RX8s.

mikeferz42

thank you. i'm still a bit clueless about emissions on rotaries. my past car failed smog due to a high flow cat and possibly loss of back pressure from the egr. just wanted to do a little research on the egr valve, that the rx8 doesn't have before getting a high flow cat. hah. thanks again.

nycgps

iTrader: (1)

The side exhaust ports has something to do with it.

AJAX1214

Actually, the RENESIS does have Exhaust Gas Recirculation (EGR), it is just an internal one just like previous rotary's with no "valve".

The rotary has always had internal EGR to aid combustion, but the RENESIS greatly reduced (from the elimination of the port overlap) the internal amount of EGR flow for better combustion stability at low volume flow (idle) and better combustion efficiency.