2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

Pointers on good power gains on S5 N/A?

Thread Tools
 
Search this Thread
 
Old 06-13-04, 08:16 PM
  #1  
Full Member

Thread Starter
 
fastcars101's Avatar
 
Join Date: Aug 2003
Location: FAIRFAX VA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
Pointers on good power gains on S5 N/A?

i just bought a 91 GXL and i was wondering what some good modifications are to increase power. the car already has a jdm cat-back system on it and lightweight flywheel, and racing clutch. What are some good ways to increase power without spending over 1k?
Old 06-13-04, 08:17 PM
  #2  
Eat Rice Don't Drive it.

iTrader: (3)
 
1987RX7guy's Avatar
 
Join Date: Nov 2002
Location: Laredo, Tx
Posts: 12,752
Likes: 0
Received 1 Like on 1 Post
Why would you spend money on a JDM cat-back? its stock just like USDM
Old 06-13-04, 08:19 PM
  #3  
Eat Rice Don't Drive it.

iTrader: (3)
 
1987RX7guy's Avatar
 
Join Date: Nov 2002
Location: Laredo, Tx
Posts: 12,752
Likes: 0
Received 1 Like on 1 Post
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/true-duals-g-tech-trials-o-316352/

this was a good investment. They now sell this for around 1100 dollars. It dropped the g-teh 1/4 time about 1.4 seconds from a race-piped stock exhaust system(removed cat)


Santiago
Old 06-13-04, 09:08 PM
  #4  
Full Member

Thread Starter
 
fastcars101's Avatar
 
Join Date: Aug 2003
Location: FAIRFAX VA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
hey buddy i bought the car with the exhaust on it. if you dont have anything nice to say dont say anything at all. Didnt your mom teach you that?
Old 06-13-04, 09:20 PM
  #5  
Older than Dirt

 
Mr. Gadget's Avatar
 
Join Date: May 2003
Location: Parts Unknown
Posts: 1,448
Likes: 0
Received 0 Likes on 0 Posts
While the "Powah" and I debate every once in a while, I do have to stick up for him here. JDM gets used like Xerox or Fedex. Many people buy something becasue its advertised as "jdm". this seems to have been a selling point when you bought your car. There are very few parts that are differnt between the Japan and US market. Most have to do with emissions and right hand drive.
Old 06-13-04, 09:21 PM
  #6  
Eat Rice Don't Drive it.

iTrader: (3)
 
1987RX7guy's Avatar
 
Join Date: Nov 2002
Location: Laredo, Tx
Posts: 12,752
Likes: 0
Received 1 Like on 1 Post
EDIT aww he beat me to it. Mine is the ricer reality check version though.



JDM= Japaneese domestic market


Get that? JDM is nothing. Its a term used to make ricers jiz their pants. They think JDM is better somehow when most of the time with FC's its just about the same. If you really have a JDM exhaust then its stock and no better than the USDM mufflers it came with. Get that?
Old 06-13-04, 09:26 PM
  #7  
Clogged cat

iTrader: (3)
 
koukifc3s's Avatar
 
Join Date: Sep 2002
Location: Orange County, CA
Posts: 2,000
Likes: 0
Received 0 Likes on 0 Posts
what theyre saying is...

get an exhaust system! A straight pipe or high flow cat with some aftermarket mufflers.
Racing Beat is quiet and sounds great.
Corksport is cheaper, single, and sounds nice but is very loud.
Take your pick
Old 06-13-04, 09:42 PM
  #8  
Full Member

Thread Starter
 
fastcars101's Avatar
 
Join Date: Aug 2003
Location: FAIRFAX VA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
sorry i now feel like a douche
Old 06-13-04, 09:46 PM
  #9  
Full Member

Thread Starter
 
fastcars101's Avatar
 
Join Date: Aug 2003
Location: FAIRFAX VA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
im assuming you guys know alot about rotary motors so i was wondering if you could tell me exactly what a street port does.. i hear it used alot and dont really know what it is.
Old 06-13-04, 09:59 PM
  #10  
Eat Rice Don't Drive it.

iTrader: (3)
 
1987RX7guy's Avatar
 
Join Date: Nov 2002
Location: Laredo, Tx
Posts: 12,752
Likes: 0
Received 1 Like on 1 Post
Sorry I was harsh but I really hate all the things on ebay having to have JDM on them. Its really annoying.


A street port is when you rebuild your engine and you have an engine builder or you can do it yourself but what you do is you "port" which is enlarging the intake and exhaust ports so that your engine can flow more air in and out of itself. It allows for more power to be made. Its the most basic of ports which is just enlarging and smoothing the stock style ports. More aggressive styles are Bridge ports, J-bridge ports and peripheral ports. You can learn some about this at www.mazdatrix.com Check it out its informative. There are also some good sites and links in the FAQ threads at the top of this page.

Santiago
Old 06-13-04, 10:00 PM
  #11  
Lives on the Forum

 
WAYNE88N/A's Avatar
 
Join Date: Feb 2004
Location: Coldspring TX
Posts: 5,721
Likes: 0
Received 2 Likes on 2 Posts
To put it simply, it allows more air to enter the combustion chamber, if done right creates more useable power in the upper rpm ranges, especially in conjunction with exhaust/ intake mods...that help?
Old 06-13-04, 10:02 PM
  #12  
Rotary Enthusiast

 
andrew lohaus's Avatar
 
Join Date: Jan 2003
Location: fl
Posts: 1,255
Likes: 0
Received 0 Likes on 0 Posts
a streeport can not be had for less than $1k or without rebuilding the engine. intake, exhaust, intake manifold porting, weight reduction, and if you still have money, an SAFC will be your best bets to make power.
Old 06-13-04, 10:14 PM
  #13  
JKM

 
JKM's Avatar
 
Join Date: Oct 2003
Location: Burlington, NC
Posts: 1,341
Likes: 0
Received 6 Likes on 2 Posts
Here would be my FC shopping list if I had a thousand dollars. This is assuming that your FC is stock or close to it. In order...

K&N cone filter w/ cold air box. Won't do much by itself, but will help with other mods. 40 bucks for filter, about 40 to build the box.

Exhaust. If you have emmissions to deal with, get a good high flow cat into a good corksport, Racing Beat, or other good catback. If you don't have emmissions, use a downpipe and presilencer. For the ultimate, you can go true duals but that's expensive...

But before you do ANY of that, give that car a tune-up. New sparkplugs, wires, fuel filter, air filter (if you don't get the cone filter yet) 02 sensor, adjust your TPS (do a search for that one) and so forth.

A properly running stock FC will run just as fast if not faster than a modded FC that runs like ****.
Old 06-14-04, 06:49 AM
  #14  
Full Member

Thread Starter
 
fastcars101's Avatar
 
Join Date: Aug 2003
Location: FAIRFAX VA
Posts: 123
Likes: 0
Received 0 Likes on 0 Posts
thanks alot that answers my questions
Old 06-14-04, 06:09 PM
  #15  
still love the FC

 
cbrinega's Avatar
 
Join Date: May 2002
Location: Dayton, Ohio
Posts: 360
Likes: 0
Received 0 Likes on 0 Posts
Re: Pointers on good power gains on S5 N/A?

Originally posted by fastcars101
i just bought a 91 GXL and i was wondering what some good modifications are to increase power. the car already has a jdm cat-back system on it and lightweight flywheel, and racing clutch. What are some good ways to increase power without spending over 1k?
Since you have to pass emissions, I would go with these mods:

Bonez High Flo Cat $350
(single cat with pre-silencer NOT the dual one -- www.rx7.com)

Engine Tune Up $150
-- spark plugs, wires, belts, filters, etc
-- Make sure the 6 PI and VDI work!
-- If you have to take the Lower Intake Manifold (LIM) off, then install pineapple racing sleeves available from Corksport ($50) (use green loctite).

K&N Intake with Cool Air Box $100
-- do it yourself or buy one

SAFC (Look for a used one in the For Sale section?) + Dyno Tuning $400

With these modifications you should be in the 160 to 170 rwhp range if your engine is in good shape. I would also suggest doing the tune up and Bonez High Flo Cat first and the SAFC + Dyno Tune last.
Old 06-14-04, 06:25 PM
  #16  
777** The Anti-rice

 
DEZERTE's Avatar
 
Join Date: Sep 2002
Location: Seattle, WA
Posts: 2,100
Likes: 0
Received 0 Likes on 0 Posts
All you need: https://www.rx7club.com/showthread.p...threadid=31410
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
NoMorePoison
2nd Generation Specific (1986-1992)
11
08-18-15 11:18 AM



Quick Reply: Pointers on good power gains on S5 N/A?



All times are GMT -5. The time now is 09:20 AM.