ok i know tons of people are talking about which is exhaust is better yadda yadda yadda...but what exhaust setup is gonna be the best for horsepower if your gonna stay na? for example i only plan on doing exhaust...pulley...headers...etc...ive heard that the greddy evo2 isnt great at all unless your gonna go turbo...also i know alot of people stay true duals is the way to go but from quite a few people ive also heard just going with a y pipe back and test pipes is better than any true dual setup...i just wanna get some comments from people with different exhausts and how they like them with there na setup...as of right now im interested in getting the rsr or the greddy evo2 if i hear anything good about it...

 

In the end ur ur going NA.....whats better a dual system with test pipes...or a y pipe with test pipes?....dual every day of the week. 2 pipes comapred to 1= twice the airflow (not literally)...but a lot more and more hp...ive got borla and love it...brings out the exotic sound

 

borla, injen, stillen all produce similar gains and more than any other exhausts. i chose injen bc it looks diff and sounds nice.

 

I think when more N/A people start dynoing the Greddy EVOII, they are going to see that it outperforms all, except probably the Stillen w/ low end torque... I really like the design of the Greddy because it kinda combines all the best aspects of the different exhausts w/ a twist....imo it also sounds the best w/ test pipes, which is a big deciding factor for me as well as the performance...

 

i hear the New 5 zigen pro racer x tube gives you 10 horsepower to the wheels. I don't know if this is true but 5 zigen themeslves have this posted in the exaust section at i-m-racing. anyways the thing with exaust is you lose the rear diffuser, i am still waiting for a carbon fiber fabrications company to make a diffuser that goes with aftermarket exasausts, That will fit exausts with a central muffler like stillen or 5 zigen and also fit cars with two side mufflers like gredy evo 2 or the new Dual Jic coming out( which by the way looks like it could be just as good as the 5 zigen) also rsr dual sound but thats illegal in americal(notice all the good exaust are dual with an exin the middle( stillen greddy, jic(the new one) 5 zigen . peace

 

good luck getting 10whp out of an exh on a stock car.

 

Overall, most systems will give out the same range of extra power +/-. In my case, it was more of the sound. The stock was too quiet for my taste. So I went with the stillen. Its nice and subtle.

Remember, you have to live with the sound for as long as you have an aftermarket exhaust.

 

here are some facts......

If you want the most power, you will have to live with the loudest sound.

Dual systems aren't necessarily better. What is important is the overall resistance to flow. A single 3" pipe has roughly the same cross-sectional area as two 2.25" pipes. The resistance to flow in the single pipe will actually be less. Why?.....Because, the resistance to flow is greatest at the gas/pipe wall interface and with a narrow pipe dual system, there is more contact area. A dual system will also cause the exhaust gas to lose heat faster and thus slow exhaust gas velocity on this basis. Due to the narrorer individual tubes in a dual system, however, the exhaust gas velocity will be greater on this basis. In the end...certain gains are cancelled by certain losses and you are basically left with the fact that as long as the combined cross-sectional area coming out of both headers is maintained and neither increased or decreased, you will have enough velocity and low enough resistance to flow that single/dual will work equally as well. A single *may* also have a weight advantage over a dual.

 

I agree with Speedracer 100%. Dual isn't necessary better, plus single will save alot more weight. (one pipe one canister VS two pipes two canisters)

Acutally, if you really check those racing exhaust for Z from Japan, Most of them are single pipe single outlet.

Greddy's Racing Ti is single pipe single out let, and I am sure it will outperform the Greddy Evo2 since "Racing Ti" is Greddy's "RACING EXHAUST."

So does Greddy's Power Extreme II (Japan only, not for sale in the US). It's also single pipe single outlet.

Apexi N1 (japanese version) also single pipe single outlet.

I think JIC's racing exhaust is also single pipe sinle outlet

to name a few.

Dunno why there are so much hype about Dual.

 

from someone who has sold and installed and driven all types of exhausts extensively, it positively absolutely makes next to NO difference whatsoever.

On this car, all the exhausts give the same basic gains within a couple hp when you compare apples to apples.

Adam

 

yah i somewhat agree...i mean i think the biggest thing is is just to get a aftermarket exhaust to breath better...so for everyones oppinion would the rsr or greddy evo2 be a good exhaust choice to go with? i want sumthin pretty loud that doesnt sound like stock...but then again i dont want a nasty muscle car sound either...

 

Nismo exhaust keeps the same note as the stock exhaust, just louder. I think it sounds great. The price is on par with other full systems (~$895 on sale always). Keep in mind when you add high flow cats, plenum, CAI or popcharger you will make it louder.

 

yah i have a popcharger right now and i wouldnt mind doing test pipes as logn as they dont rattle and make my cel go on....but ive hward the nismo exhaust with headers and intake and it still seems like they had to get on it to make it sound good...and the sound is def nice as helll when they get on it but i want sumthin you can hear and tell is aftermarket at like 2.5-3k rpms...

 

amuse ti exhaust gain 11whp from stock.
with y-pipe and test pipe it gains 20~25 whp.?
so itz possible though.

 

I do agree that most exhaust might generate similar HP, but there is always a better one, even with it only have 1 or 2 hp more.

Another thing is, I don't think Greddy Racing Ti is release yet, so I don't think anyone has installed it yet nor Dyno it. Actually, I think so far only US made exhaust has been dyno, but most of JDM exhausts or Japanese made exhausts (besides Nismo) hasn't been dyno in NA application. It will be a interesting thing to see, since most JDM racing applications are single pipe and single outlet. I really want to see the test result of it.

And the last thing is, most of us only pay attention at how much hp gain but fail to look at performance overall.
For example:
Titianium Exhaust save you alot of weight (especially, single pipe single outlet), so if you look at power to weight ratio, titanium exhaust acutally outperform most of stainless steel exhaust.
And since it save the weight of your car, overall your car's performance in many aspects are better.

When Honda first introduce NSX type R, they focused on weight reduction instead of just increased power. I readed on a Japanese Magazine, and it mentioned that Honda engineers felt that if they can save more weight on the car, They acutally increase every performance aspect of the car, even braking. So instead of increase HP at the time, they save weight. They didn't increase the HP till 97.

 

there is no way the Amuse exhaust, even with a Y pipe and test pipes, gives 25 hp unless it comes with a small nozzle for NOS for the intake

 

I'd wait until the APS exhaust and Test Pipes are for sale. Top notch quality and from the sound clip on there web site it sounds AWESOME!! Can't wait to see what it dynos at.


http://www.**************/350z/exhaust/exhaust.htm

 

thats what the amuse stated along with their dyno sheet.
i'll dyno mine sometime this summer to see if itz real.

 

the thing with an N/A setup is that if you go with a too free-flowing exhaust (ie large diameter single outlet) - you might gain the most power up top, but you're also going to lose the most torque down low - a race car spends most of its time in the upper-range of the RPM band (that's why peak HP gain is most relevant to them) whereas street cars spend most of their time in the lower-to-mid range of the RPM band - some restriction/backpressure needs to be there on an N/A car in order to keep from losing the low-end torque these cars are known for - unless you're going to be tracking your vehicle constantly, I would first suggest a true-dual setup (Stillen, GReddy, Injen) then either a good y-pipe (JIC) paired with a good y-pipe back exhaust...

 

dont ever trust a manufacturers dyno sheet. they often take the lowest dyno they ever get stock then compare it to the highest one with their mods. at most i could see you gaining 15whp with header back exhaust on an na.