I want to eliminate my dual exhauste i need your opinion
#78
I'm a boost creep...
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And in terms of weight reduction, 30 pounds for a single part is a very big number...
2. They make silencers that are exhaust pressure-activated, and perform almost the same as no silencer, as well as silencers that are remote controlled butterfly valves.
3. How is a single system with the same equivalent amount of exhaust restrictions going to be any louder?
...I doubt it would be a really noticeable difference.
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Sure thing Mr. McCarthy...
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Someone notes their experience and opinion and he keeps saying "YOUR WRONG, LISTEN TO ME"
So you have experience in " a properly sized dual-muffler system" as you've said 500 times... good for you. For those of us who dont have thousands of dollars to throw away experienting with exhaust systems, we'll take our single and try to make it quiet.
what is the difference in your typical dual vs. my typical single? ONE FREAKIN MUFFLER!
It's my opinion that the extra muffler isnt worth the money or sound.
It's also my opinion and experience that the single aviods any potential flow issues.
In my hood...
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...my 7 is quiter than ANY non-stock dual. So I've obviously done something right...
On the 7, exhaust exits on only one side so there is no real need for a 'Y'.
#79
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Sure it's not a large percentage of the total, but does that mean that no one should ever remove any weight if it's not 200+lbs? If you remove/change a few things here and there that each save 10, 20, 30lbs then pretty soon you've got a car that's significantly lighter.
#80
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IMO, to call a car "significantly" lighter it'd need to loose 10% of its weight, which is between 260 and 300lb depending on model. You'd need to remove a lot of those 10, 20, 30lb items to get there, meaning you end up with a stripped out ****-box. A few people like driving pseudo-racecars on the road, but those people aren't normal. Buying a lighter car would be much smarter.
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#82
Sure thing Mr. McCarthy...
A. with stock turbo, there is no need to go 3"
B. with stock turbo, there is no 'wastegate control'
C. there was no compromise. By lowering boost, I've done exactly what I wanted to do. No boost creep, no over-boost, quiet exhaust (relative), single with great flow.
-communist gangsta
#83
The weight saving is well under 1% of the car's total weight. Good luck noticing that...
You've answered your own question. IF you can keep it quiet. The reason for two parallel mufflers is being able to have better noise suppression for the same flow or the same noise suppression for better flow.
You've answered your own question. IF you can keep it quiet. The reason for two parallel mufflers is being able to have better noise suppression for the same flow or the same noise suppression for better flow.
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there aint many car around this price is turbo / rwd / handles as good with as much room
#84
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Even with the stock turbo, you'll get more power and quicker response with a 3" exhaust that you will with a 2.5" one. Those are things I like, which is why I no longer have a 2.5" exhaust.
B. with stock turbo, there is no 'wastegate control'
C. there was no compromise. By lowering boost, I've done exactly what I wanted to do. No boost creep, no over-boost, quiet exhaust (relative), single with great flow.
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#85
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So it's not that difficult and those pounds can add up quickly to be 100lbs or more. Say you've got an S4TII, going single, 30lbs, steel to aluminum hood, 20lbs, stock to 'vert wheels, 40lbs, stock to light flywheel, 15lbs. There, we're over 100lbs and we've changed 3 things and the car's not a "stripped out ****-box".
It's a pretty dumb argument you're having, basically saying that if it's not 250-300lbs then don't bother, because you're not going to find anything to remove that's 300lbs, so therefore we shouldn't care about weight at all? It's a fact that lighter cars get better gas milage, accelerate faster, stop shorter and turn better than a heavy one does. Sure it's a matter of scale and 300lbs will make more difference than 30lbs, but if you can save weight then I think you should do so wherever you can, because as I just showed, it can all add up pretty quickly.
It's a pretty dumb argument you're having, basically saying that if it's not 250-300lbs then don't bother, because you're not going to find anything to remove that's 300lbs, so therefore we shouldn't care about weight at all? It's a fact that lighter cars get better gas milage, accelerate faster, stop shorter and turn better than a heavy one does. Sure it's a matter of scale and 300lbs will make more difference than 30lbs, but if you can save weight then I think you should do so wherever you can, because as I just showed, it can all add up pretty quickly.
#86
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Depends what you remove. You'll lose more than that if you're replacing the stock system. All I've ever claimed is that the weight difference between a single-muffler and a dual-muffler system using the same type of mufflers will be ~20lb.
Two examples of weight reduction with no disadvantages. Well done. Although unless you're lucky and get a good deal on an aluminium hood painted the right colour, it's an expensive way to lose 20lb.
Yay, smaller wheels with higher profile tires. Who the hell want that for their TII?
But I didn't say removing 100lb would have that result, did I? Don't make stuff up to suit your argument, it only weakens it further. Where's the other 150-200lb coming from?
Actually I didn't say that at all. You're jumping to that conclusion to make an argument (again). You said it was easy to make a car "significantly" lighter. To me, that's how much weight you'd need to loose before you can claim a significant effect on performance. If you'd said losing 100lb will result in a small improvement in performance, I'd have agreed with you.
All completely true, but you're missing the point that nearly everything you take off the same to save weight will be a compromise if some sort. Each part you consider removing should be looked at on its own merits rather than some over-riding crusade to lose weight. Some things will have little to no disadvantage, but IMO with the exhaust (that's the thread topic remember, not hoods and wheels) the advantages of a dual system outweigh the very small weight penalty.
...steel to aluminum hood, 20lbs... stock to light flywheel, 15lbs.
...stock to 'vert wheels, 40lbs...
There, we're over 100lbs and we've changed 3 [actually four] things and the car's not a "stripped out ****-box".
It's a pretty dumb argument you're having, basically saying that if it's not 250-300lbs then don't bother, because you're not going to find anything to remove that's 300lbs, so therefore we shouldn't care about weight at all?
It's a fact that lighter cars get better gas milage, accelerate faster, stop shorter and turn better than a heavy one does. Sure it's a matter of scale and 300lbs will make more difference than 30lbs, but if you can save weight then I think you should do so wherever you can, because as I just showed, it can all add up pretty quickly.
#87
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Apexi GT SPec Or N1 I have both never put the N1 on my car but I put the GT Spec **** looks bad *** didnt finish with the piping soo I cant tell u how it sounds but it looks bad ***
#88
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Maybe you didn't say those things in as many words, but you've been implying that it's not worth it because it's "only" 20 or 30lbs and that if it's not a bunch more weight all at once then it's not worth it. My point is simply that you can do some things that don't necessarily compromise the comfort of the car and still save a bunch of weight and it'll have advantages, so why the heck not? To me 100lbs is pretty significant. Then there's a bunch more things that'll have a fairly minimal impact on the civility that'll save more weight. Maybe it's not 10%, but it'll be noticable to almost anyone who's paying attention and loosing weight is always a worthy goal within your broader plans and expectations of the car.
Ok so maybe people don't want 15's, but even if you just go to S5TII wheels you'll save 20lbs, and going to lighter aftermarket ones can save you more.
For me, when I weighed my car it was 2850lbs (heavy street wheels, big sways, roll bar), and it needs to go on a diet for better track performance, so evey bit counts, and 20lbs in one fell swoop is a good start.
Ok so maybe people don't want 15's, but even if you just go to S5TII wheels you'll save 20lbs, and going to lighter aftermarket ones can save you more.
For me, when I weighed my car it was 2850lbs (heavy street wheels, big sways, roll bar), and it needs to go on a diet for better track performance, so evey bit counts, and 20lbs in one fell swoop is a good start.
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#90
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Ok so maybe people don't want 15's, but even if you just go to S5TII wheels you'll save 20lbs...
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#91
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Yes, it's about exhausts, I was just trying to address the general impression you seemed to be giving that weight losses of this magnitude weren't really important, whereas I'm saying that in the overall scope of the car it can add up to a decent loss of weight. The car's a system after all and we need to look at it as such.
Ok, 16lbs, I missrememberd, I thought they were 16lbs, they're 17.
Ok, 16lbs, I missrememberd, I thought they were 16lbs, they're 17.
#92
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IMO the whole "it all adds up" argument is just a bit retarded. Every weight-loss mod you make should be done on it's own merits, not as apart of some mindlessly-repeated mantra. If the advantages don't outweigh the disadvantages, look elsewhere.
BTW, I noticed you said earlier you were going to replace your RB system with a 2.5" single system. Will the weight lost be worth the power loss that's going to cause?
One more thing, that 100lb you so easily saved before is about the same weight you gain every time you refill the fuel tank. I can't say I've ever noticed enough of a performance loss to make me want to put less fuel in the tank.
BTW, I noticed you said earlier you were going to replace your RB system with a 2.5" single system. Will the weight lost be worth the power loss that's going to cause?
One more thing, that 100lb you so easily saved before is about the same weight you gain every time you refill the fuel tank. I can't say I've ever noticed enough of a performance loss to make me want to put less fuel in the tank.
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#93
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So obviously if you're serious about going fast, every ounce counts.
#96
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So obviously if you're serious about going fast, every ounce counts.
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Now that being said, if it's a track car then this discussion is also moot as it should have a megaphone exiting behind the front passenger tire.
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Neither exhaust, when properly designed, will make more power then the other type. The compromise then is how it looks, and how much noise it makes compared to how much it weighs. In a street application, putting up with the extra noise a single exhaust generates seems crazy.
I'm also willing to bet that a lot of those who like single exhaust have never heard something as elegant and well designed as the Racing Beat turbo-back dual system. Only a bit louder then stock, yet can support some very high power levels.
#97
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Many supercars, the Lotus Elise/Exige and some others come with essentially no interiors, just the bare carbon body showing through, they must be crappy ![Wink](https://www.rx7club.com/images/smilies/wink.gif)
I do agree that a stripped out car probably isn't the best for daily driving, and I did say that weight loss is good within the larger scope of your goals of the modifications, I didn't say you should necessaily do it just for the weight loss alone.
I might go 2.5", I might go larger, but the pre-silenser is 2.5"and header outlets all seem to be that size anyway. I've got an NA, not a turbo, so 3" is likely overkill.
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I do agree that a stripped out car probably isn't the best for daily driving, and I did say that weight loss is good within the larger scope of your goals of the modifications, I didn't say you should necessaily do it just for the weight loss alone.
I might go 2.5", I might go larger, but the pre-silenser is 2.5"and header outlets all seem to be that size anyway. I've got an NA, not a turbo, so 3" is likely overkill.