single or dual exhaust
#26
Rider of the Sky
Originally Posted by ramz28
i think its 1/100 off your 1/4 mile time for evey 100lbs of weight lost
Gain from effect on a % for % scale, no modification is more effective than weight reduction. Cutting your weight in half is far more effective overall than doubling your horsepower. But arguing over 20 or 30 lbs when your car is still well over a ton is like a heated debate about the effects of putting on a cold-air intake on an otherwise stock engine.
...Especially when many drivers aren't exactly the trim athlete themselves. The driver is part of the car, after all.
#27
Rotary Enthusiast
iTrader: (1)
Join Date: Dec 2005
Location: Everett, WA
Posts: 1,017
Likes: 0
Received 0 Likes
on
0 Posts
every 100lbs is a tenth of a second.. for 40 pounds wont do much.. basicly its up to you.. i wanted dual really bad.. but i onyl have money for a single so i went single havnt recieved my exhaust yet but everyone that has the exhaut that i got loves it.. go to www.ssautochrome.com $385.00 shippeed to my house.. cheap and great..
*EDIT*
It turbo back..
*EDIT*
It turbo back..
#29
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally Posted by Sharado
Weight makes a huge difference
be it just 10 lbs or even 5 lbs
so I would definitely go for single, which I have on my car
PS: if you think 5 extra pound is a non-issue, you are no racer.
be it just 10 lbs or even 5 lbs
so I would definitely go for single, which I have on my car
PS: if you think 5 extra pound is a non-issue, you are no racer.
Do you realise how much your car weighs? A dual-muffler system adds ~20lb compared to a similarly built single-muffler system. Do you understand what a tiny percentage difference that makes to the car's total weight? Even on the lightest FC it's well under 1%. Do you honestly think you can tell the difference? You add 80-100lb to the car just from filling up with gas. Or do you add fuel in 1gal lots (~6lb each)?
#30
I had a stock rx7 and raced my friend's rx7 and we were even, strong engines and bone stock. I started to lighten my car gradually over the year and didnt notice a difference. Spare and jack, rear interior, aluminum hood, battery, seat, all done at seperate times. I thought i was gonna beat my buddy by 1/2 a car or so cause i didnt really feel a change. When we raced again, i easily won, i pulled almost 2 cars on him by the end of second gear. I had a corksport single too and didnt feel a thing other than the ringing in my ears, I currently have a stock catback after i welded a extra muffler on the corksport which rubbed the ground and eventually broke off....
My friend did a little experiment and stripped his car bare bones, not even a dash, he zip tied his guages to the firewall. He has a streetport(ghetto 1st time try with no runner work at all) and true dual exhaust for power mods, stock intake. He destroys 350zs and s2ks and lost to an evo by about a car length. He is now addicted to lightening
Bottom line is if you want to go faster, single is obviously better even if you might not notice the difference
My friend did a little experiment and stripped his car bare bones, not even a dash, he zip tied his guages to the firewall. He has a streetport(ghetto 1st time try with no runner work at all) and true dual exhaust for power mods, stock intake. He destroys 350zs and s2ks and lost to an evo by about a car length. He is now addicted to lightening
Bottom line is if you want to go faster, single is obviously better even if you might not notice the difference
#32
Senior Member
Join Date: Feb 2004
Location: NYC/Stony Brook Univ.
Posts: 702
Likes: 0
Received 0 Likes
on
0 Posts
Ummm....i do agree with the general consensus that 15-30 lbs won't make a difference especially for a car that probably wont see any further weight reductions.
BUT...you can't possibly tell me that a full tank to a 1/4 tank-fueled car doesnt make a difference? I only fill up to 1/4 tank (cause i got no moneys) and if i ever fill the tank the car feels like a pig.
BUT...you can't possibly tell me that a full tank to a 1/4 tank-fueled car doesnt make a difference? I only fill up to 1/4 tank (cause i got no moneys) and if i ever fill the tank the car feels like a pig.
#33
Rotary Slave
iTrader: (3)
I dont see the deal here.
Single:
Slightly lighter
Slightly less restriction
Duel:
Slightly more restrictive
Slightly heavier
But Duel looks much nicer and cleaner to me. Its all up to personal taste cause performance and weight isnt enough of an issue to bitch about, when we are speaking in such small amounts (1-2hp and 10-20 pounds)
Single:
Slightly lighter
Slightly less restriction
Duel:
Slightly more restrictive
Slightly heavier
But Duel looks much nicer and cleaner to me. Its all up to personal taste cause performance and weight isnt enough of an issue to bitch about, when we are speaking in such small amounts (1-2hp and 10-20 pounds)
#34
whats going on?
iTrader: (1)
driving around in my corksport it wasnt too loud cus you got used to it. after i stopped and drove my new fc, and finally starting my old one back up i must say, its loud as ****. really really fucken loud. of course i must say that i had a completly uncorked exhaust. anyways. a true dual setup from mazda trix is a nice investment. its quiet, and it will be pretty quiet. its much quieter than the uncorked corksport, yet it will still produce AROUND the same hp that mine did. plus weight should not be a factor for a daily driven car. unless you compete heavilly in competitions, weight isnt an issue. now if you have a friend in your car and hes 300 lbs, kick that ****** out.
#35
Rotary Slave
iTrader: (3)
Something that pisses me off a bit is people that talk about weight savings and make a big deal of it... then you look in the back of their car and they have a bunch of subs and amps and whatnot... WHAT THE HELL IS THE POINT of saving weight when you have 75-100 pounds of audio equip. in the back of your damn car Just an observation
#36
Eats, Sleeps, Dreams Rotary
It's so you still weight slightly less than you started out with, I would imagine :p
Personally I like single-exit exhausts (as long as they aren't too ginourmous), but that's just me. I like the asymmetry.
What I find more amuzing is when people spend 500 bucks on a carbon fiber hood when they haven't even so much as bought new tires, suspension, or rims... especially when they have hood pins (and almost certainly the stock latch as well).
Personally I like single-exit exhausts (as long as they aren't too ginourmous), but that's just me. I like the asymmetry.
What I find more amuzing is when people spend 500 bucks on a carbon fiber hood when they haven't even so much as bought new tires, suspension, or rims... especially when they have hood pins (and almost certainly the stock latch as well).
#37
What's the point??
iTrader: (6)
Join Date: Oct 2005
Location: Omaha, NE
Posts: 995
Likes: 0
Received 0 Likes
on
0 Posts
Disclaimer: This post contains liberal amounts of sarcasm.
If you are THAT obsessed with weight redux, cut a hole in your fender and route a custom exhaust. It'll weigh less than the stock mani, not to mention all the massive amounts of sheet metal removed by cutting the hole.
If you are THAT obsessed with weight redux, cut a hole in your fender and route a custom exhaust. It'll weigh less than the stock mani, not to mention all the massive amounts of sheet metal removed by cutting the hole.
#38
Ooooooh, custom.
Join Date: Oct 2006
Location: Corona, CA
Posts: 618
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Sharado
Weight makes a huge difference
be it just 10 lbs or even 5 lbs
so I would definitely go for single, which I have on my car
PS: if you think 5 extra pound is a non-issue, you are no racer.
be it just 10 lbs or even 5 lbs
so I would definitely go for single, which I have on my car
PS: if you think 5 extra pound is a non-issue, you are no racer.
Yes, 5 pounds can make a difference, but only if youve already got it gutted, tuned, proper suspension, and remember, you still have to be at the proper weight, you might even have to add balast for races!
Tool.
#39
I like my borla duals, **** single tips, no good reason to even bother, most aftermarket duals are featherweight compared to the stock system anyways, and if you wanna remove exhaust weight, ditch everything stock, RB or corksport header, presilencer, stainless dual catback, deep and free flowing without sounding like a folgers can. Dual mufflers give you the option of being mellow when you need your hearing or wanna actually use your bling stereo to pick up chicks since your single, as MadRX7Racer has successfully concluded through deductive reasoning.
#40
There were no survivors
Originally Posted by FCKing1995
Single:
Slightly lighter
Slightly less restriction
Duel:
Slightly more restrictive
Slightly heavier
#41
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally Posted by FCKing1995
Single:
Slightly less restriction
Duel:
Slightly more restrictive
Slightly less restriction
Duel:
Slightly more restrictive
#42
BRAAAAAP pssh BRAAAAAP
iTrader: (11)
Join Date: Mar 2004
Location: cali
Posts: 1,461
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by ramz28
i think its 1/100 off your 1/4 mile time for evey 100lbs of weight lost, but even up 2 50lbs on street car makes nuthing change. this car drives so nice you dont evne know its there, theis cars gonna get a dual exhaust and hopesfully true dual, looking at racing beat road race system will check out corkport 2
so you are telling me that if you had a car that could fit four of your friends who weigh about 200lbs each you would not run slower than .1 difference than if you ran a 1/4 mile by yourself with the car empty hahahahahhahahahahahhahahahahahahahhahahahha dude please dont post on here if you have no clue as to what the hell you are talking about i am so sick of people who type stuff on here and have no clue or experience with cars/racing/or anything that has to do with this forum
wow i think i have a headache now
#44
Banned. I got OWNED!!!
Join Date: Nov 2002
Location: San Jose, CA
Posts: 312
Likes: 0
Received 0 Likes
on
0 Posts
it really looks weird...........I know there are several rear skirts that have the inserts to cover up the other opening but still not worth it unless you've already gutted and race-prepped your car and are looking to decrease the most amount of weight possible.
#45
Rotary Slave
iTrader: (3)
Originally Posted by NZConvertible
Like I already said, there are many other more important variables other than single or dual that determine how well an exhaust flows. You simply can't make blanket statements like that.
#46
The General RE
If you were to compare a single 3.5"with a magna flow and a dual 2.5" system with two magna flows. These sizes would have nearly the same flow area.
The dual system would cost more, be quieter, fit better, look more balanced and have better ground clearance.
The single system would have less internal turbulance and friction, but I don't know if you would see much of a gain in power.
Which one is better? That is up to the individual. I like dual. Single gives a second gen the looks of a v6 mustang. An empty spot on one side.
The dual system would cost more, be quieter, fit better, look more balanced and have better ground clearance.
The single system would have less internal turbulance and friction, but I don't know if you would see much of a gain in power.
Which one is better? That is up to the individual. I like dual. Single gives a second gen the looks of a v6 mustang. An empty spot on one side.
#47
Full Member
Join Date: Oct 2004
Location: Long Beach
Posts: 145
Likes: 0
Received 0 Likes
on
0 Posts
The racing beat true dual outperforms the "Dual exhaust" which I believe is less restrictive than a single exhaust...I have compared the true dual and i think an hks version and the true dual gave more power. Also if you do go single....please..i repeat get a rear bumper that is made for a single....I laugh at 7's racing around with one muffler and a gaping hole on the otherside
#48
Eats, Sleeps, Dreams Rotary
For the record, a 30-pound loss (if you took off one of my mufflers it would probably be closer to 40 pounds... for a Magnaflow and some bottlenecked piping) makes a much bigger difference on a car with a stock-ish engine versus one with say, 400 HP...
Sort of how a golf car with no one on it would be pretty damn fast, reasonably fast with one, and slow as hell with 4. Or why even a racing go cart will be different with a 130 pound driver versus one that weighs 180 (that's why they're in different classes)... or why someone who weighs 200 pounds wouldn't be very satisfied on a 250 CC motorcycle, but someone who weighs maybe 170 would have the time of their life (...well, maybe not on a 250).
Obviously the difference between any of these things an a car is a bit different, but if you were compare a 160-HP torqueless NA to a turbo with 300 ft-lbs of torque, those 20-30 pounds (combined with say, 20 pounds from taking off the A/C, 18 or so from the PS, etc) have very different meanings to different people.
Sort of how a golf car with no one on it would be pretty damn fast, reasonably fast with one, and slow as hell with 4. Or why even a racing go cart will be different with a 130 pound driver versus one that weighs 180 (that's why they're in different classes)... or why someone who weighs 200 pounds wouldn't be very satisfied on a 250 CC motorcycle, but someone who weighs maybe 170 would have the time of their life (...well, maybe not on a 250).
Obviously the difference between any of these things an a car is a bit different, but if you were compare a 160-HP torqueless NA to a turbo with 300 ft-lbs of torque, those 20-30 pounds (combined with say, 20 pounds from taking off the A/C, 18 or so from the PS, etc) have very different meanings to different people.
#49
Calm like a bomb
Join Date: Apr 2005
Location: Columbus, GA
Posts: 133
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Rxseven7
or if you want the dual just get it and if the 15lb makes that much of a diffrence to you then jsut take the weight off somewere else.
#50
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally Posted by FCKing1995
i was speaking on the terms of having a 3'' stright through exhuast with single muffler (Corksport) vs something like RB kit with presilencers and y pipe, then 2 mufflers.
The ehxuast gas has to split and move around a bit more.
Originally Posted by Valkyrie
For the record, a 30-pound loss (if you took off one of my mufflers it would probably be closer to 40 pounds... for a Magnaflow and some bottlenecked piping) makes a much bigger difference on a car with a stock-ish engine versus one with say, 400 HP...
Thread
Thread Starter
Forum
Replies
Last Post
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM
LunchboxCritter
2nd Generation Specific (1986-1992)
15
01-03-16 04:11 PM