i got an 87 rx7 n/a... what all upgrades should i do to the motor to get big horsepower??

 

I think they're hinting the search function at the top of the forum, this has been covered at least twice in the past 4 days.

 

 

drop a V8 in for "big" horsepower

 

I love the humor in this crowd. Yes, search, but focus on reliability first - do your tune-ups, replace any vacuum lines, coolant hoses, Mazda thermostat/cap, make sure your 6PI system is working, fix that exhaust leack (jk), etc.

 

"Search", but the only thing you really can do with a N/A for power is exhaust and air intake. Youll be lucky if you get 200 HP out of a N/A.

Chris

 

<Sarcasm on> If you mean by "exhaust and air intake" turboing, then 200 hp is reasonable.

<Sarcasm off> To get 200 hp out of an NA involves much more than just a cold air intake (assuming it's one that really gets cold air and isn't in the engine bay) and an exhaust.

 

There is a thread in the Archives called "how to make a beefy n/a". Start there, then search on anything you have specific questions about.

 

And please - na is non-aspirated, n/a means Not Applicable, which is a little insulting to us NA RX7 drivers, if you think about it (but many TII drivers would argue more accurate.)

 

rotary makes huge gains w/ simple mods ....thats y people love them start outside the motor ....exhaust, intake, ignition,driveline ,ect

 

Over 200 can be reached with porting after the correct bolt on mods, fuel and timing tuning.

 

Ignore the V8 trolls, and port your *****. Bridgeport it and make it sound like a tractor.

 

The correct term is naturally aspirated. Non-aspirated doesn't make sense.

The only way to make a "lot" power out of a non-turbo engine would be to p-port it (plus the obvious mods like exhaust of course). Mazda made 700hp out of a 4 rotors n/a engine so I'm guessing 300hp to the flywheel would be possible with a 13B. Good luck though.

 

Or normally aspirated.
Basically, a realistic goal for an NA with a healthy streetport is 160 to the wheels. Past that requires a full standalone with a good tune, which should net you around 180-185 at the wheels. To get past that requires tweaking the intake and some luck. 200 is about the absolute max attainable with radical porting. With a bridge you can get 250-260 and a PP can get you over 300, but they aren't exactly what I would consider "streetable" cars. And no, the fact that you can drive them on the street doesn't make them streetable.

 

you wish I were a troll!

he asked for big NA power so I say V8!

 

Full Racing Beat exhaust or: mufflers (any brand), air pump activated 5th and 6th ports, then (only after you take care of the 5th & 6th ports) a performance catalytic converter. That's step 2. Step 1 is do all maintenance items. Now go search for the rest.