I am most likely going to buy a 2nd gen tII. the only dowside is i need it to get to school and back and i know rotarys arnt wallet friendly. I just want to know what modifications will improve gas milage. i heard that new ignition helps. and it seams like a new exhaust system would help because you are getting more power with the same fuel going in. Is there any way to port your engine to improve gas milage? thanks for any help.

 

Gas millega and rotary does not fit in the same sentence.
Like Army intelligence.

 

Clean the fuel injectors. Full tuneup, including plugs/wires/air filter. Free flowing intake & exhaust can help.

Most importantly, shift low. The secondary injectors go on around 4000 RPM, and when they kick in, you can pretty much watch the fuel gauge drop.

-=Russ=-

 

No performance modifications (i.e. exhaust, intake) are going to improve gas mileage they will only decrease it. Increased fuel economy is only a sales pitch these companies use to sell more product. Think about it increased airflow is only going to mean more fuel to maintain the same air-fuel ratio and increased HP means your going to be burning more fuel. Better gas mileage? Buy a civic or put in a V8 is my .02.

 

Actually... they will increase fuel economy. A large percentage of the engine's power goes to fighting internal resistance - friction, as well as pumping losses. It takes energy to suck air in and push it out the tail pipe.

A freer flowing intake & exhaust will in most cases improve fuel economy, because the engine doesn't have to work as hard to suck air in or push it out.

You're right about the higher airflow and power requiring more fuel, but that only comes into play when you're at or close to wide open throttle. If you're just cruising around at part throttle, you're using the same airflow as before, just with less energy spent pumping it.

-=Russ=-