rx-7 porting


ymb honk
07-04-2003, 02:56 PM
i work at a machine shop so porting and polishin along with repalcing cams are no problem i was wondering what would make the biggest diffrence hp wise?

walterdixon
07-06-2003, 03:43 PM
uuummmm, rotary engines don't have camshafts.

As for porting, a street port will give you considerable gains in hp and is well worth it if the engine is already being rebuilt.

Chris V
07-09-2003, 09:12 AM
http://www.rotaryengineillustrated.com/RE101pages/4-ports101.html

Gives you the best info on ports and porting I've found.

illest7
07-10-2003, 09:28 AM
a nice street port can see gains of 20% in hp

Steel
07-11-2003, 02:30 AM
Well. If you wanna go totally crazy get a periperal port. but that's for race only vehicles. But they're crazy. Bridgeports give big gains, but dont last very long. Standard streetport would be best.

illest7
07-11-2003, 09:44 AM
Ive seen some peripheral ports that run better than a poorly done street port... Its not a race only application. They can definitely be streetable.

Steel
07-12-2003, 02:07 PM
a streetable pp?:eek7:

if you think an idle of 2k RPM, and having the powerband start at around 5k RPM is streetable. Not to mention emissions.

edit- As i've said before, i like to call the pp the "Ridiculous amounts of overlap causing pretty much loss of all low end power and torque-port"

illest7
07-12-2003, 02:47 PM
I didnt say "convenient to drive daily" I said streetable :)

Steel
07-12-2003, 02:50 PM
lol, well streetability IS convinience to drive on the roads. Hell, a funnycar can be streetable, just extremly inconvinient to drive down the street to get a pack of smokes. Plus im sure funnycars arent smog legal either.:smile:

dayna240sx
07-12-2003, 09:07 PM
Originally posted by Steel
a streetable pp?:eek7:

if you think an idle of 2k RPM, and having the powerband start at around 5k RPM is streetable. Not to mention emissions.

edit- As i've said before, i like to call the pp the "Ridiculous amounts of overlap causing pretty much loss of all low end power and torque-port"


This is the beauty of my C-port... low end power, smooth, transistionless powerband.. near stock idle, but a PITA to get the engine management tuned...

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