1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Why are rx-7's so fast?

Thread Tools
 
Search this Thread
 
Old 04-18-02, 10:16 PM
  #1  
Full Member

Thread Starter
 
.:Adam GS:.'s Avatar
 
Join Date: Nov 2001
Location: San Diego, CA
Posts: 89
Likes: 0
Received 0 Likes on 0 Posts
Question Why are rx-7's so fast?

I was wondering this the other day...

how is it that an 18 year old, 100HP, 1.2L car can be so fast?

I mean, i'm keeping up with new 180HP civics...

How light is the RX-7 compared to the civic (Ex model)

thanks... Now when my idiot civic friends at school talk crap about my 7, I can tell them why it's fast (because I really don't know)
Old 04-18-02, 10:26 PM
  #2  
EliteHardcoreCannuckSquad

 
SilverRocket's Avatar
 
Join Date: Apr 2001
Location: Ontario, Canada
Posts: 2,266
Likes: 0
Received 0 Likes on 0 Posts
Power to weight ratio...

Stock, our SA/FBs have around 23 pounds per horsepower (if you figure approx 2300 pound weight). Add a good exhaust and a few more goodies and you're lookin at 18-19. Jump up to an aftermarket carb and now you're talkin 15. Lose a bunch of unnecessary heavy stuff and now you're in the neighborhood of 13-14.

Consider that a stock TII has a power to weight in the 15s, a stock NA FC has a power to weight in the 18s and a stock FD around 11. You can easily start to see how our little FBs can make a whole lot out of a seemingly small amount of power.
Old 04-18-02, 10:27 PM
  #3  
Old [Sch|F]ool

 
peejay's Avatar
 
Join Date: May 2001
Location: Cleveland, Ohio, USA
Posts: 12,507
Received 416 Likes on 296 Posts
Well for one thing, I doubt the civics really have 180hp... unless that's 110hp + 20hp from the exhaust + 15hp from the intake + 15hp from the plug wires + 10hp from the special spark plugs... (in other words, 110hp )

They're not really that fast stock... many minivans would demolish a stock 1st-gen in the quarter mile.
Old 04-18-02, 10:33 PM
  #4  
Full Member

Thread Starter
 
.:Adam GS:.'s Avatar
 
Join Date: Nov 2001
Location: San Diego, CA
Posts: 89
Likes: 0
Received 0 Likes on 0 Posts
Well.. that civic kid is a dumbass anyway.. he's convinced that premium gas adds 5 HP, air fresheners add HP, and what was that other thing.. oh, the new Civic performance ash tray.. like 20HP...

I'm stock for all I know.. the car had one owner before me, and I have most of the records. No performance stuff in there, but some decent aftermarket replacement parts.

Oh.. btw.. at what rpms do your secondaries usually open?

Last edited by .:Adam GS:.; 04-18-02 at 10:36 PM.
Old 04-18-02, 10:39 PM
  #5  
#!/sup_mod/üb3rg33k

 
error402's Avatar
 
Join Date: Sep 2001
Location: Kansas City
Posts: 96
Likes: 0
Received 0 Likes on 0 Posts
don't thry open at 3500? (someone correct me if I'm wrong)

I do know you can shorten the spring that opens the secondaries. so, you have them open sooner. people usally do that because over a period of time the spring becomes less stiff causing the secondaries to open a later rpms
Old 04-18-02, 10:42 PM
  #6  
EliteHardcoreCannuckSquad

 
SilverRocket's Avatar
 
Join Date: Apr 2001
Location: Ontario, Canada
Posts: 2,266
Likes: 0
Received 0 Likes on 0 Posts
if you shorten it, be careful you don't go too far at first - cutting off about 1/3 is what most end up with... just go a little bit at a time and try it out
Old 04-18-02, 10:48 PM
  #7  
Old [Sch|F]ool

 
peejay's Avatar
 
Join Date: May 2001
Location: Cleveland, Ohio, USA
Posts: 12,507
Received 416 Likes on 296 Posts
also don't forget that rx-7s have a lot more torque because our engines are larger. (equivalent of 2.3l, versus a 1.6l) and we're correct wheel drive so we have more traction
Old 04-18-02, 10:52 PM
  #8  
Administrator

iTrader: (8)
 
mar3's Avatar
 
Join Date: Nov 1998
Location: So. Arlington, TX!!!
Posts: 12,974
Likes: 0
Received 59 Likes on 36 Posts
It ain't real torque until you're talkin' 400 ft-lbs at a paltry 2500 RPM...oh, sorry, wrong marque.... where's our '80 big brake brackets so we can run Wilwood 4-pots, peejay??
Old 04-18-02, 11:04 PM
  #9  
Senior Member

 
Jason Guthrie's Avatar
 
Join Date: Apr 2001
Location: Bay Area
Posts: 269
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by .:Adam GS:.
Well.. that civic kid is a dumbass anyway.. he's convinced that premium gas adds 5 HP, air fresheners add HP, and what was that other thing.. oh, the new Civic performance ash tray.. like 20HP...

I'm stock for all I know.. the car had one owner before me, and I have most of the records. No performance stuff in there, but some decent aftermarket replacement parts.

Oh.. btw.. at what rpms do your secondaries usually open?
I know my voodoo shift know added "50hp"!
No such thing as a 180hp civic. The new SI they are coming out with is only 170 and is the highest HP I have ever seen in a civic. I think the integras had 170hp (Type R). One thing for sure though, civics are light just like us. They might be slightly bigger, but the doors are thin as well as the rest of the large body areas.
Old 04-18-02, 11:50 PM
  #10  
smog nazi destroyer

 
riffraff's Avatar
 
Join Date: Jul 2001
Location: california
Posts: 1,681
Likes: 0
Received 1 Like on 1 Post
donot forget the stickers.. that adds an extra 5hp per
Old 04-18-02, 11:55 PM
  #11  
Kai
Rotorphile.

 
Kai's Avatar
 
Join Date: Mar 2002
Location: Richmond/NoVA
Posts: 1,296
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by Jason Guthrie


I know my voodoo shift know added "50hp"!
No such thing as a 180hp civic. The new SI they are coming out with is only 170 and is the highest HP I have ever seen in a civic. I think the integras had 170hp (Type R). One thing for sure though, civics are light just like us. They might be slightly bigger, but the doors are thin as well as the rest of the large body areas.
I thought the new Si had the 160hp K20 RSX base engine? Anyway, the most powerful US-market Integra was the 195hp Type R. (Sorry, recent Honda convert)
Old 04-19-02, 12:08 AM
  #12  
Junior Member

 
firstRX-7's Avatar
 
Join Date: Mar 2002
Location: Edmonton Alberta
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
my dad drives a 200hp mini-van and it will kill the FB every single time.....I hate it
Old 04-19-02, 12:25 AM
  #13  
10.32 @ 133

 
AJC13B's Avatar
 
Join Date: Mar 2001
Location: Sydney, Australia
Posts: 1,362
Likes: 0
Received 0 Likes on 0 Posts
This:



+ this:



= quick
Old 04-19-02, 12:29 AM
  #14  
Full Member

 
Join Date: Feb 2002
Location: San Luis Obisbo, California
Posts: 143
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by firstRX-7
my dad drives a 200hp mini-van and it will kill the FB every single time.....I hate it
Which mini van is that?

If I ever had to get a mini van I would buy a Honda Oddessy, 240hp yessssss 16.5 on the 1/4, 8.1 0-60
Ah well not bad for a mini van
Old 04-19-02, 12:37 AM
  #15  
-

iTrader: (1)
 
zYgoTe's Avatar
 
Join Date: Feb 2002
Location: Biloxi, MS
Posts: 28
Likes: 0
Received 0 Likes on 0 Posts
I think that nifty one-wiper mod adds at LEAST 75 hp.
Old 04-19-02, 02:38 AM
  #16  
KARATE EXPLOSION

iTrader: (1)
 
cpt_gloval's Avatar
 
Join Date: Aug 2001
Location: Deadmonds, WA
Posts: 2,991
Received 33 Likes on 19 Posts
they get goin' alright 'cause they have a good wide torque spread. from 3500 up till about 5500 or so, they have a good amount of torqe. a 1.6l honda engine has like 110 ft lbs of torque at most, and that's all the way up at like 6k rpm.
Old 04-19-02, 05:30 AM
  #17  
The Rotorheaded Geek

iTrader: (1)
 
OtakuRX's Avatar
 
Join Date: Mar 2002
Location: exit 8 in Manchester, NH
Posts: 920
Likes: 0
Received 0 Likes on 0 Posts
you have to also remember, our horse power starts to kick in around 3000-4000 and runs and increases till like 7000 or higher, while theres don't kick in till about 6000-7000, their redline.
Old 04-19-02, 05:31 AM
  #18  
The Rotorheaded Geek

iTrader: (1)
 
OtakuRX's Avatar
 
Join Date: Mar 2002
Location: exit 8 in Manchester, NH
Posts: 920
Likes: 0
Received 0 Likes on 0 Posts
the way i waist integras is not shifting till after you see him shift, hold it longer, don't cut the gears short.
Old 04-19-02, 08:10 AM
  #19  
male stripper

iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
my caravan iS MaD qUick Yo!
Old 04-19-02, 09:49 AM
  #20  
Full Member

 
More Power's Avatar
 
Join Date: Feb 2002
Location: FL
Posts: 134
Likes: 0
Received 0 Likes on 0 Posts
The Si will rev to 8500 rpm. It makes 160 hp and about 120 lb-ft of torque I think. I think the torque peaks around 5500 rpm. The new Si makes the same hp, but more torque. It also peaks at a lower rpm.

The Integra GSR makes 170 hp and the Type R 195. Exhausts and intakes don't do a lot for those cars because they are already making around 100 hp per liter. You can't improve a whole lot on that.
Old 04-19-02, 10:12 AM
  #21  
Driven a turbo FB lately?

iTrader: (1)
 
MIKE-P-28's Avatar
 
Join Date: Oct 2001
Location: Fort Branch, Indiana
Posts: 6,444
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by peejay
Well for one thing, I doubt the civics really have 180hp... unless that's 110hp + 20hp from the exhaust + 15hp from the intake + 15hp from the plug wires + 10hp from the special spark plugs... (in other words, 110hp )

They're not really that fast stock... many minivans would demolish a stock 1st-gen in the quarter mile.
yeah I had a buddy with a new Dodge V6 mini van some years ago, and he'd waste my ***! Untill he addded some 32 speakers, 10 amps, 9 batteries, 2 alt's, LOL Then it was slow as ****... But louder than HELL!
Old 04-19-02, 10:32 AM
  #22  
male stripper

iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
here in murray there is a maroon caravan with all that speaker crap, aluminum hatch spoiler, 17 or 18 rims, custom painting and emblems, tint, etc. it's bling bling bean.
Old 04-19-02, 02:33 PM
  #23  
Full Member

 
nopistonsforjoe's Avatar
 
Join Date: Apr 2002
Location: Riverside and La Jolla, CA
Posts: 131
Likes: 0
Received 0 Likes on 0 Posts
ive seen a video of a souped up dodge caravan absolutely destroying a z28 camaro...it had to be the funniest thing ive ever seen.
Old 04-19-02, 02:56 PM
  #24  
male stripper

iTrader: (1)
 
jeremy's Avatar
 
Join Date: Oct 2001
Location: St Petersburg, FL
Posts: 3,131
Likes: 0
Received 1 Like on 1 Post
that guy has the turbo version that he "massaged". that thing is quick for a minivan. i might sell my 7 and hook my van up. what do you guys think?
Old 04-19-02, 03:16 PM
  #25  
Full Member

iTrader: (1)
 
ruos's Avatar
 
Join Date: Mar 2002
Location: Miami
Posts: 138
Received 0 Likes on 0 Posts
you know what else those clear tail lights are worth at least 25hp & you know what else the bass they install.


Quick Reply: Why are rx-7's so fast?



All times are GMT -5. The time now is 09:43 PM.