Which exhaust makes most power?
MJ Fererra rationalized some adaptive ecu explanation because he needs to live in denial about his failures. Exhausts produce power and the ecu isn't going to cut boost unless you're using some crap gas.
I never believed the tapering(increasing) diameter theory. The things that are important would be how the exhaust is made to make the best use of pressure waves.
There are alot of exhausts there that are good and bargains. But the 'best' to me would be the lightest and the biggest for the appropriate application. I'd venture to say a good 3inch stainless steel downpipe, a light(ti) cat delete, and a ti catback. Ti saves alot of weight, and extra weight is wasted power. Thats my opinion.
There are alot of exhausts there that are good and bargains. But the 'best' to me would be the lightest and the biggest for the appropriate application. I'd venture to say a good 3inch stainless steel downpipe, a light(ti) cat delete, and a ti catback. Ti saves alot of weight, and extra weight is wasted power. Thats my opinion.
Originally Posted by VTECH8TR
Wow you got sensitive here. I was only stating the truth, TRUST me i know what i am telling you and i have had my car on a dyno ALOT more times than you. All you have to do is OPEN your eyes and see it. But maybe you didn't install is someone else did, that is why you don't know this 
.
.No, not sensitive at all
I know it's hard on the internet as there's no tone inflection. If I came across as a jerk, I apologize. But I want real, hard information. Not I read it somewhere or heard it from the guy around the corner. As we all know, the internet can be one of the largest sources of disinformation. But...to get back on track, do you really believe that on a mostly stock car, one more resonator is going to make that much of a difference? We're talking about a tube, 10" long or so, with perforations on the inside. No protrusions but perforations. Hard to believe...with the RM01A having one less flange/joint than most systems, that has to be worth something. Even a small lip will cause reversion and hurt flow.As for the installation, I've spent the past five years heavily modifying a third gen 7, mostly with my own two hands. The whole point of the Evo was to try and avoid mods altogether (that worked!) and not waste any more time working on cars. But I will say this; I laid my hands on the exhaust outside the box and there's no way to insert your fingers and feel the inside of the resonator. It's too far back in the piping. Unless you have really long fingers. Dunno. Also, I purchased the exhaust in Orlando and if you read my post, you know it won't fit inside the Evo without sticking one end out the window. Not exactly something one should do in a new car, in Florida, for a four hour trip. So I had it installed by someone else. Believe me, I have the cuts, stains and dirty nails to "prove" my prowess under the hood!
Originally Posted by Mr. Stock
No, not sensitive at all I know it's hard on the internet as there's no tone inflection. If I came across as a jerk, I apologize. But I want real, hard information. Not I read it somewhere or heard it from the guy around the corner. As we all know, the internet can be one of the largest sources of disinformation. But...to get back on track, do you really believe that on a mostly stock car, one more resonator is going to make that much of a difference? We're talking about a tube, 10" long or so, with perforations on the inside. No protrusions but perforations. Hard to believe...with the RM01A having one less flange/joint than most systems, that has to be worth something. Even a small lip will cause reversion and hurt flow.
As for the installation, I've spent the past five years heavily modifying a third gen 7, mostly with my own two hands. The whole point of the Evo was to try and avoid mods altogether (that worked!) and not waste any more time working on cars. But I will say this; I laid my hands on the exhaust outside the box and there's no way to insert your fingers and feel the inside of the resonator. It's too far back in the piping. Unless you have really long fingers. Dunno. Also, I purchased the exhaust in Orlando and if you read my post, you know it won't fit inside the Evo without sticking one end out the window. Not exactly something one should do in a new car, in Florida, for a four hour trip. So I had it installed by someone else. Believe me, I have the cuts, stains and dirty nails to "prove" my prowess under the hood!
I know it's hard on the internet as there's no tone inflection. If I came across as a jerk, I apologize. But I want real, hard information. Not I read it somewhere or heard it from the guy around the corner. As we all know, the internet can be one of the largest sources of disinformation. But...to get back on track, do you really believe that on a mostly stock car, one more resonator is going to make that much of a difference? We're talking about a tube, 10" long or so, with perforations on the inside. No protrusions but perforations. Hard to believe...with the RM01A having one less flange/joint than most systems, that has to be worth something. Even a small lip will cause reversion and hurt flow.As for the installation, I've spent the past five years heavily modifying a third gen 7, mostly with my own two hands. The whole point of the Evo was to try and avoid mods altogether (that worked!) and not waste any more time working on cars. But I will say this; I laid my hands on the exhaust outside the box and there's no way to insert your fingers and feel the inside of the resonator. It's too far back in the piping. Unless you have really long fingers. Dunno. Also, I purchased the exhaust in Orlando and if you read my post, you know it won't fit inside the Evo without sticking one end out the window. Not exactly something one should do in a new car, in Florida, for a four hour trip. So I had it installed by someone else. Believe me, I have the cuts, stains and dirty nails to "prove" my prowess under the hood!
Don't get me wrong the Fujitsubo is an Awesome exhaust, i was just not happy on how quiet it was and i did not like the resonators. Of course you have to compromise for the noise. The more HP you make by adding parts the more it will be noticeable.
Last edited by VTECH8TR; Oct 12, 2005 at 08:10 PM.
Originally Posted by MaxR
MJ Fererra rationalized some adaptive ecu explanation because he needs to live in denial about his failures. Exhausts produce power and the ecu isn't going to cut boost unless you're using some crap gas.
Let's speak theoretically...if the ECU does "jump" maps to keep things in proper order, what prevents reflashed ECU's from doing the same? Tabular values are modified. Perhaps the modifications extend to all tables? Or is there only one table of values?
Originally Posted by VTECH8TR
Do a search on Buschurs staged upgrade posts. He gives you everything you need to know with Dyno results, Hell he is the only one here that does this and we gotta thank him for that.
Don't get me wrong the Fujitsubo is an Awesome exhaust, i was just not happy on how quiet it was and i did not like the resonators. Of course you have to compromise for the noise. The more HP you make by adding parts the more it will be noticeable.
Don't get me wrong the Fujitsubo is an Awesome exhaust, i was just not happy on how quiet it was and i did not like the resonators. Of course you have to compromise for the noise. The more HP you make by adding parts the more it will be noticeable.
No, I know. I think you're a bit more serious about modding your Evo than I am in which case, a higher flowing exhaust will make a difference. I'm stopping! I swear! No more mods for me. I needed another 30hp or so and I think with a reflash and MBC I'll have it.
I definitely respect Dave and do thank him for much good info.
Originally Posted by Mr. Stock
No, I know. I think you're a bit more serious about modding your Evo than I am in which case, a higher flowing exhaust will make a difference. I'm stopping! I swear! No more mods for me. I needed another 30hp or so and I think with a reflash and MBC I'll have it.
I definitely respect Dave and do thank him for much good info.
I definitely respect Dave and do thank him for much good info.
you wont stop modding...just put it off for a while. The ecu will richen the mixture over time to match the factory parameters- when you throw the exhaust on, t bo flows more air- car feals "faster" because it runs lean- eventually the ecu learns and adjust air fuel to the correct ratio- you flow more fuel and air, but the initial hp is higher. it may continue to have even hp numbers as packing blows out.........
