which is a better bang for my buck getting the intake side ported or exhaust? i read so much about intake porting but little on the exhaust side would this mean less gains? anywho if anyone says less gains there real dumb because the combustion needs more flow coming out:P oh yes and how about lighting rotors whats the most i can do is there side effects to lighting it info PLZ

 

are you running a TII or NA?

 

N/A

 

Ive always heard that on a N/A that a big exhaust port along with a big intake port is the way to get the most power out of your N/A. You gotta remember that you will lose drivability the larger the port is.

 

i beleive just a bigger intake port will loose driveablity but i plan a somewhat medium large intake port with a large exhaust port

 

You'll get a slight benifit from porting only one at a time, and a huge benifit(generally) from both. Think of if this way, why suck more air in if you cant push it all out too. and vice versa, if the exhaust can flow much bettr why not the intake too. Also, keep in mind if you have to pass emmisions, you will not be able to with porting. Unless you've got a haltech or an S-afc and can tune it on a dyno, and still be a daily driver.
So I guess I'd say go for both!!
Lightening the rotors will produce a faster revving engine, but you will have to slip the clutch a bit more due to the fact that you have less enertia lower in the rpm range.

 

hmm any good so cali companys that can do a port for both exhaust and intake really good also theres a place near my house that does dyno runs so im sure they could help me with the programing btw does porting make nitrous a bit "safer"?

 

Isn't Mazdatrix in so cal? I doubt porting will make n2o any easier on your engine. I've bee studying it for a while and as long as you can add the fuel w. the n2o and you can control the timing you'll be ok.

 

hmm wheres that scatcart guy he knows alot about nitrous in sevens but im hoping to get at least 200 with the porting and lightend rotors alone then run a 100shot of n20 then i call it quits on the performance side set the headers to exhaust part

 

lightening the rotors wont do much for HP but it will for a fast reving engine same as a lightweight flywheel with the same consoquenses (sp?) have you checked the price of lightened rotors? RB selles them i think the shed a pound off of them which is a lot considering its a rotor but they also const $2,200

 

ahh i thought it was like dollars for each one

 

sorry then that musta been like a kick in the *****

 

i cant feel them anymore ahh lol oh well ill just buy a 20b and work on it for 20 years then ill get a 900hp all motor rotor engine

 

im not even gonna tell ya the price of a 20b conversion

 

around 15 grand:P

 

There's no reason in the world not to port both at the same time. the cost of labor on a port job is small compared to the tear down and rebuild that is required.

 

Slayer, I've read a couple posts of yours, make sure your rx-7 is mechanically sound before you actually put money into the engine.. Then, you have to start with the basic mods and then work your way to having the engine ported. But you have to remember this isn't just a port job.. you have to rebuild the entire engine also. You should really do research into this. Remember you can get alot of power out of doing simple mods first. Such as getting rid of those parasitic cats.

 

you could just do what im doing to take money outa each paycheck and put it into your "new engine" fund so that when your curent one goes you have the cash to do what you want with your new motor and you dont have to be another person looking for the cheapest rout possable to get there car back on the road.

 

Go to Pineapple Racing in Washington. I've never heard anything bad about them.

 

Large streetport and large exhaust port too. Most any rotary shop should be able to do it properly and well, and if they can't, well, that's like not being able to change the timing belt on a piston engine (anyone can do it!).

As Node said, Pineapple Racing is definitely one of the best shops in North America. Mazdatrix is up there as well. Either choice would be top notch. Without engine removal, the porting would probably cost you about $275 - $350