Rotary Engine & NA Engine 1.9L or Smaller Question?

[kbrew8991]

Lets say you had a 2 rotor rotary engine that was NA, 1.3L - do the +0.3 factors "stack up" in this case?

Or in other words under that same case would you be able to claim both lines and come out of that section with a +0.6 credit?

[gkmccready]

Subscribing so I don't miss the answer to this one...

[Greg G.]

Lets say you had a 2 rotor rotary engine that was NA, 1.3L - do the +0.3 factors "stack up" in this case?

Or in other words under that same case would you be able to claim both lines and come out of that section with a +0.6 credit?

No, only the one factor is for rotary engines.

[Ryan S.]

"Rotary engine with a maximum of two rotors and one turbocharger turbine = +0.3

 

"Naturally aspirated (non-rotary) engine with displacement 1.9L or less = +0.3"

 

So reading the rule explicitly; a rotary engine car is only benefited when setup as forced induction with a single turbo. If the car is running a naturally aspirated rotary engine then as compared to the same car setup with a 1.9l or less piston engine, the car carries a penalty.

 

As an example an Rx7 would be better off converting to a Miata engine to run naturally aspirated, and a Miata would be better off converting to a single turbo 13b to run forced induction.

 

Is my reading correct? Is that the intention of the ruling?

[kbrew8991]

Maximum of one turbo, but not a minimum of one turbo either. So a single turbo or NA rotary engine would get the +0.3 credit

[Greg G.]

Maximum of one turbo, but not a minimum of one turbo either. So a single turbo or NA rotary engine would get the +0.3 credit

Correct.