I'm a noob so cut me some slack I was just wondering if anybody had some insight on which exhaust I should go with. I'm in between the EVO 2, and the EVOTT by Greddy. I do plan to eventually go twin turbo and know that the EVOTT is absolutely the BEST! However, i'm wondering if it would be alright to slap the EVOTT on for a while until I go turbo? Understand....it's gonna be a while until I get twin turbo money. And besides that, I have an 07 with the HR motor and don't know yet what the price is gonna be for the kit....anyhow.....any insight on the exhaust would be greatly appreciated

 

 

dude you will be fine either way, I have the injen true dual and love it.

 

Why spend more money when its not nessisary, that would be a waste.

 

gonna drop quite a bit of low end torque if ya kill off all the back pressure with the TT but its better than buyin two exhausts.

 

backpressure is NEVER a good thing....you're confusing your terminology ^

the Evo TT works very well on the HR engine, albeit a bit loud

 

Ok, so the EVO 2 sounds like the better coice then right? Can you school me about the whole back pressure thing?

 

http://en.wikipedia.org/wiki/Backpressure

http://www.uucmotorwerks.com/html_pr...torquemyth.htm

http://www.team-integra.net/sections...?ArticleID=355


that should help.

 

better choice? I didn't say that did I?

either one would work well - neither exhaust is quiet, neither exhaust is particularly easy to install either. Comes down to what you like the looks of, and cost

 

The heard the Evo2 in person and it is really quiet. The guy's engine was louder than his exhaust.

If I had to choose between the two, I would definitely get the EvoTT. It does make power, but the improvement is in the higher rpm's. It's sounds nice and deep too.

 

There are as many exhaust systems as there are opinions on which one to
buy. No, a true dual system will not diminish your low end torq but it will
free up HP. I'm on my third system and still haven't found the sound I'm
looking for......my next choice would either be Fast Intentions, Stillen or
HKS. You can go to Fast Intentions web site and hear how cool there system
sounds and it's FI capable.........Good Luck!

 

just goes to show you, people's opinions differ regarding sound. An Evo2 is still too loud for my tastes, at least on a G coupe with test pipes...I didn't like it at all. No soundclip will ever faithfully reproduce the true sounds, unless some very high end equipment is used. The only true way to get the sound is to go to a meet and hear it for yourself.

 

If you want to go forced-induction then go forced-induction. The exhaust is a trivial detail.

 

you sir fail. Explain how back pressure is NEVER a good thing?

 

Modern cars don't need any back pressure. It's a carry over myth, from the very old carbureted engines that relied on the reversal of some exhaust gases throught the exhaust valves. The stock tune of the engine would account for some of the residual burnt gases being present. When a larger exhaust was fitted to these engines and the resulting less back pressure at the same RPMs, there would be less residual burnt mixture present and more air now, but still the same fuel would be fed as before. This would result in a leaner mixture, potentially leading to burnt exhaust valves. With the advent of modern fuel injection and closed loop ECU programs that rely on real time input from O2 sensors, it just isn't a problem anymore.

The myth gets fueled by the fact that many people relate smaller diameter piping with better low end power, which for the most part is true. The part people make mistakes on is relating the increase in torque to the increase in back pressure from the smaller diameter pipe. This real reason is exhaust velocity. Higher exhaust velocity improves exhaust scavenging. The exhaust gases travel in pulses with the opening and closing of the exhaust valves, the faster the pulse moves, the larger the vacuum it generates behind it. The resulting vacuum behind the first exhaust pulse, helps to pull the burnt gases out of the cylinder once the exhaust valve opens again. To gain the most power out of an exhaust you want the most exhaust velocity as possible with as little back pressure as possible, at all times. Each diameter of pipe on a specific engine will have its highest exhaust velocity with very little back pressure at a set RPM range, above that it will generate back pressure, and below that the velocity will be slower.

TK

 

I don't know why we bother anymore. I've tried to dispel the idea that backpressure is a good thing for years on these boards, and even when they read the reasoning, most can't understand it. Think about it: These people don't have the skill to change their own oil, swap an air filter, select an exhaust system, or google "backpressure" w/o someone holding their hand. What hope do they have of understanding the theory behind this? We need a sticky or FAQ entry on backpressure. I don't give a damn anymore, I just laugh at the ignorance along with everything else here.

 

first of all, lose the chip on your shoulder....and try to be a bit respectful to people who just might know ALOT more than you do. At 19 years old, you might also want to relinquish yourself to the notion that you don't in fact know everything, and that with all this time left on the planet, sometimes sitting back, reading, and learning, is the smart thing to do. Believe it or not, some us here have been building, modding, and racing cars since the time you were running around your house in footie pajamas.

Second of all, just 6 posts back from yours, on this same page, someone was kind enough to post up three separate explanations about backpressure. Rather, than show everyone how "witty" you are with your internewb "you fail" tag, perhaps you should actually read those three entries and learn something, The next time you post, you then can show people that you have something intelligent to contribute.

 

Well said you beat me to a response to Mr "Know it all"

 

Listen i said "you sir fail" in a notion of jest. Im tired of you old farts putting us down for being 19 and for expressing our thoughts. Remember all you were once 19 and "acted" witty just as i do i just dont do as serious as you bags do. Like ive stated before, i have no use for numbers. Backpressure is not a bad thing. I am using this analysis of backpressure being good from rotary engines. I dont know it all. Im done . Go buy yourself a lambo or something. Thanx to all who helped in my question. I hope noone treats your children as disrespectful when they express there thoughts.

 

No one puts anyone down for being a certain age...you do get put down, on here, and in life, by acting like a know-it-all and by contributing nothing but snide remarks.

Enlighten me how backpressure in a rotary is a good thing? Keep in mind I might have owned and built a few RX7's as well.

Yep we all were 19 once you're right....not all of us acted like you do though. And at "33", I'm hardly old...I'm just wise enough to listen to those who might know more than I do