Hey guys, I just bought a 89 rx7 NA few days ago,
and I'm thinking about doing some modifications to make it faster.
Any suggestions for basic mods?
looking for something that wont cost a lot just to increase a few hp
If you are a FC owner, what are the mods you have on your car?
Any advice would help

 

Intake and exhaust, porting, turbo (most hp for the amount of money you spend)

 

A similar thread was started just the other day:
https://www.rx7club.com/forum/showthread.php?t=997547

My regular street car:

Mods:
- Racing Beat catback exhaust and new rubber exhaust hangers
- K&N cone filter (Installed by the previous owner. I would just have used the drop-in K&N replacement filter to avoid sucking hot air into the engine).
- KYB AGX adjustable shocks/struts with Racing Beat springs
- Optima Red Top battery with marine quick-disconnect ground cable
- Falken Ziex ZE-912 tires (All-weather touring tire, performance is decent too)
- Fumoto F-106 no-nipple oil drain valve from qwikvalve.com
- Koyo all-aluminum radiator
- Updated stereo surround and vents with 89-92 parts
- Aftermarket stereo and antenna relay
- Electrical re-grounded http://www.aaroncake.net/RX-7/grounding.htm

Preventive:
- New pulsation damper
- Fuel injectors cleaned and "rebuilt" by witchhunter.com
- Replaced scary old fuel hoses
- New fuel filter
- New oil filter pedestal O-rings
- New radiator hoses
- New fan belts
- New wiper blades
- New radiator fluid sensor
- New coolant mixed with distilled water
- New Mazda thermostat
- New NGK spark plugs

Fluids:
- Castrol GTX engine oil with Mazda OEM filter
- Red Line synthetic gear oil
- ATE Super Blue brake fluid (Changed back and forth with Castrol GT LMA)

 

^ That's a great list right there.

Here's a cool link: FC3S Pro: From Mild to Wild Power

 

Definitely do some porting since its na...but if you plan on goin turbo, leave the stock ports alone and add water injection, porting & turbo are for the same purposes, to force oxygen into the motor for more power so either or.
But goin turbo will def lead to more power & of course invest in the best exhaust parts to help the motor flow

 

apexi intake and exhuast made a big difference on my buddy's fc but its a bit expensive

 

oh and don't forget about that cats. if they are clogged nothing will help it til they are removed or replaced

 

go turbo!

 

With just a simple cone filter and adaptor, Racing beat header and 2.5" single exhaust, AC delete I dyno'd my NA at 132hp and 130ft/lb to the wheels. Nothing rocket fast, but quickened it up for sure!

 

What about an ECU?

 

There are plenty of ECU upgrades for the FC. Look into Haltech.