whats the diff between a 13b engine and a 20b

 

13B is the two rotor and 20B is the three rotor, not too mention around a $35,000 dollar difference

 

Not necessarily. It's true that a professional 20B -> 3rd gen install will cost about $35k. The 20B engine itself can be picked up for about $3000.

 

Installing the 20B into an RX7 usually requires fabricating/installing a new subframe for the front end so that the steering rack does not need to be moved, hence the cost. Most major RX7 tuners have experience making the switch.

The key enhancement the 20B provides is higher torque values than the 13B.

 

You can say that again

 

thanks, yea i saw it for cheap on a site, didnt know it was that much for install, thanks though

 

whats the difference betweem race ported and street ported

 

*light shines from above* this is god... *whispers* use the search button

 

search button comes up with stupid **** i dont ned to know, plus u have to look for hours for something u can just ask

 

From what little I know, when you port your motor you increase the size of the port, which means more air flow.
A street port doesnt increase the port size as much as a race port.
I think...?
Sphinx.

 

There is an awesome website about the different kinds of ports. I think it is an Australian site. Unfortunately, I don't know the url, and don't feel like searching, but it shouldn't be too hard to find if you really want to know the answer to your question.

 

This isn't the one I was thinking of, but
http://www.rotaryengineillustrated.c...-ports101.html

Oh yeah, and your attitude sucks.

 

porting an engine is similar to installing bigger cams on a piston engine. if u increase the top side of the port, its similar to adding duration, if u increase the bottom of the port, its like increasing lift. in either instance, as well as just making it overall bigger, the port flows more air, so it increases your volumetric efficiency. it makes the idle a little lumpier. (like a big cam) depending on the port, it can decrease low end power, wile increasing top end power. just my .02