zinx

iTrader: (3)

Hi Guys,

When I first heard about rotary engines a long time ago I was amazed and wanted one ever since. Well last Friday I finally bought one.

It's a 1987 RX-7, 5 speed, 52k miles, perfect condition.

I'm pretty much a newbie on rotaries except from what I have read on here and other sites but I do know my fair share about cars in general and I want to learn about them so I can do all the work myself.

It's a fun car right now but I want to make some performance mods. What would you guys suggest to do first? I was think new exhaust. Any suggestions on what I should and what parts I should get are welcome. Thanks in advance.

hybridracer

Turbo or N/A?

zinx

iTrader: (3)

N/A

hybridracer

Oh and exhaust is a great place to start, then intake, then maybe porting your intake manifolds if you are capable.

hybridracer

If you have any questions feel free to IM me, my screen name is rx7guitar.

vaughnc

Yeah stage I upgrades are usually:

FULL EXHAUST
- downpipe (replace pre-cat)
- performance main cat
- good 2.5" catback exhaust made for rx-7s (racingbeat, HKS, etc..)

FULL INTAKE
- cold air box (replace OEM airbox)
- headlight cover air intake ( www.mariahmotorsports.com can stamp your OEM headlight cover)
- K&N intake (or similar)
(mariah sells the complete kit - or make one yourself)

Underdrive pullies

Stage II

Ported engine
ECU chip (or aftermarket computer

hybridracer

I thought underdrive pulleys didnt help all that much?

Josepi

Pulleys aren't worth the $. Not for the few HP gained. After a full exhaust and an intake WITH A COLD AIR BOX, you should get a S-AFC (fuel computer) and dyno tune. Head for a leaner mix in the mid range of your rpms. Don't mess with bigger injectors or an upgraded fuel pump, or you'll just end up running really rich.

A nice place to start is the suspension. It doesn't do you any good to go fast if you can't stay on the road.

zinx

iTrader: (3)

I'm looking at the Racing Beat Downpipe/Presilencer for 86-91 RX-7 Non Turbo. This would replace the cat and everything that i would need back to the Y right? Is there a reason i would need a Cat? We don't get emissions tests in indiana.

Which exhausts would you recommend? I would like to keep it dual exhaust because it looks so much better.

airbrush1

dump the cat

emagdnim

I like the APEX'i N1 Duals..

bcty

mazdatrix sells a full dual system and Racing Beat sells the header so u can make your own.. im not sure if they offer the pipes and whole system now... RB sells great products and high quality stuff.. i would say stick with them for exhaust..