ok is street porting exactly ?? i see it offered on every rx7 performance website i got to but it doesent give a very good discription of what it is.

 

http://fc3spro.com/TECH/PORT/porting.html
It just makes the intake ports larger.

 

what is the mpg with a street port

 

Porting is like changing the cam profile on a piston engine.

 

same as stock in most cases.

 

Please search and check the FAQ/Archives before posting seemingly obvious questions. Much of what you will wonder or think of asking has probably been asked and covered before, so start by researching first. If you cannot find the answer after that, then ask.

Also check out www.rotaryengineillustrated.com for a good reference.