MRF X-Pipe - 24 HP/18 TQ gains OVER the Akra Evo?!? Something's in the Kool-Aid

[lsmkr01]

Originally Posted by whats77inaname

Glad you got it, b/c I'm still waiting for it

I didn't get anything. Just the word that production is going to start.

[Top_Gear]

Originally Posted by Malek@MRF

This system avoids resonators because it is a true Motorsport/Race bred system. It doesn't need resonators, and the buyers of this system want it for its power and light weight.

Great post but ... this is where you lost me. There are some potential buyers out there that don't want raspy or otherwise bad sound from an after-market midpipe on their premium car.

If the MRF midpipe added say 10 additional ft-lb of torque in the mid-range (5000 RPM) compared to Dinan/Akra/etc. while offering good sound as well then I am willing to bet you would have at least 10X more people on your list to buy it! Why would people buy anything else? The only reason why people do NOT choose it over the other exhausts has got to be because of bad sound. There can't be any other explanation.

Considering the low cost of good quality resonators which you already pointed out I still don't understand why you continue to hold on to the belief that the customer only wants this midpipe for its power/weight. Try providing the option of resonators to improve the acoustics of this thing and you might be surprised by the interest you get. I would certainly have my name on you list.

[Longboarder]

Originally Posted by Top_Gear

Great post but ... this is where you lost me. There are some potential buyers out there that don't want raspy or otherwise bad sound from an after-market midpipe on their premium car.

If the MRF midpipe added say 10 additional ft-lb of torque in the mid-range (5000 RPM) compared to Dinan/Akra/etc. while offering good sound as well then I am willing to bet you would have at least 10X more people on your list to buy it! Why would people buy anything else? The only reason why people do NOT choose it over the other exhausts has got to be because of bad sound. There can't be any other explanation.

Considering the low cost of good quality resonators which you already pointed out I still don't understand why you continue to hold on to the belief that the customer only wants this midpipe for its power/weight. Try providing the option of resonators to improve the acoustics of this thing and you might be surprised by the interest you get. I would certainly have my name on you list.

Good post. I had a lot of questions too before I purchased the X, mostly with respect to sound as I already knew it was going to make lots of power (my primary reason for purchasing it in the first place).

From what I recall (Malek correct me if I'm wrong as our discussions were over a year ago) the system was designed as a complete unit (MRF Velaforza) with both the X and mufflers together. But when the components were separated after production ceased and enthusiasts started trying the X with other mufflers, it was realized the X worked very well with certain mufflers, in particular the Akra, in significantly reducing rasp/bad sound that you describe.

Everybody has different needs and the exhaust isn't for everyone...but if you want the most power coupled with the least rasp. Viola....MRF + Akra.

Look I'm older (than most here), own a professional services firm and I don't want "that" impression when I take clients to lunch, etc. Driving slowly and lower RPMs is bassy but not raspy. There is some minor rasp at maybe 1/2 to 2/3 throttle on tip-in but it's gone quickly. In my exhaust vid somewhere in this thread, I drove the car hard. Even in my "normal" acceleration sections I was shifting at 5K RPM. I probably should do a vid when I'm shifting at 3K and it's pretty quiet. No rasp at all.

Just my 2c.

[W///]

Originally Posted by Longboarder

Good post. I had a lot of questions too before I purchased the X, mostly with respect to sound as I already knew it was going to make lots of power (my primary reason for purchasing it in the first place).

From what I recall (Malek correct me if I'm wrong as our discussions were over a year ago) the system was designed as a complete unit (MRF Velaforza) with both the X and mufflers together. But when the components were separated after production ceased and enthusiasts started trying the X with other mufflers, it was realized the X worked very well with certain mufflers, in particular the Akra, in significantly reducing rasp/bad sound that you describe.

Everybody has different needs and the exhaust isn't for everyone...but if you want the most power coupled with the least rasp. Viola....MRF + Akra.

Look I'm older (than most here), own a professional services firm and I don't want "that" impression when I take clients to lunch, etc. Driving slowly and lower RPMs is bassy but not raspy. There is some minor rasp at maybe 1/2 to 2/3 throttle on tip-in but it's gone quickly. In my exhaust vid somewhere in this thread, I drove the car hard. Even in my "normal" acceleration sections I was shifting at 5K RPM. I probably should do a vid when I'm shifting at 3K and it's pretty quiet. No rasp at all.

Just my 2c.

Valid points, and I will admit the Xpipe sounds great with Akra. But that's because the Akra is such a quiet muffler to start with.

Don't get me wrong, I love to mod as much as the next guy, but I already bought an Eisenmann Race at a great price. I'm not going to sell it (prob at a loss) to buy an Akra muffler ($2k used?) AND a $2k X-pipe. That's $4000 - whatever I get for the E.Race.

Since these are made to order, why not add 2 extra Vibrant resonators (they cost $90)? That's just IMHO.

And no, I wouldn't buy a $2k xpipe just to chop it up and add resonators myself. I agree with Top Gear though, if there was a choice of adding resonators from the "factory", I'd be a lot more interested.

Having said all that, someone in Cali needs to run against Malek (same transmission please).

[DopeM3]

[lsmkr01]

Originally Posted by Longboarder

Good post. I had a lot of questions too before I purchased the X, mostly with respect to sound as I already knew it was going to make lots of power (my primary reason for purchasing it in the first place).

From what I recall (Malek correct me if I'm wrong as our discussions were over a year ago) the system was designed as a complete unit (MRF Velaforza) with both the X and mufflers together. But when the components were separated after production ceased and enthusiasts started trying the X with other mufflers, it was realized the X worked very well with certain mufflers, in particular the Akra, in significantly reducing rasp/bad sound that you describe.

Everybody has different needs and the exhaust isn't for everyone...but if you want the most power coupled with the least rasp. Viola....MRF + Akra.

Look I'm older (than most here), own a professional services firm and I don't want "that" impression when I take clients to lunch, etc. Driving slowly and lower RPMs is bassy but not raspy. There is some minor rasp at maybe 1/2 to 2/3 throttle on tip-in but it's gone quickly. In my exhaust vid somewhere in this thread, I drove the car hard. Even in my "normal" acceleration sections I was shifting at 5K RPM. I probably should do a vid when I'm shifting at 3K and it's pretty quiet. No rasp at all.

Just my 2c.

Good post. I'm going to pair it at first with my ceramic Megan since it is a mild exhaust and has a fantastic tone. Even with TP's its pretty tame until you get on it which is what I like I just want more overall volume and believe this will do the trick. If it doesn't play well i'll try and find a lightly used Akra.

[lsmkr01]

Originally Posted by whats77inaname

Glad you got it, b/c I'm still waiting for it

What # are you on the list? Could be why. Looks like the decision was made yesterday EOB pacific time so that could be why you have not been told.

[lsmkr01]

Originally Posted by Longboarder

I'd love to see this.

I second that. I hear Benvo was trying to contact Malek to set this up... That video would set this forum on fire lol

[whats77inaname]

Originally Posted by lsmkr01

What # are you on the list? Could be why. Looks like the decision was made yesterday EOB pacific time so that could be why you have not been told.

Déjà vu

http://www.m3post.com/forums/showpos...&postcount=210

[lsmkr01]

Originally Posted by whats77inaname

Dj vu

http://www.m3post.com/forums/showpos...&postcount=210

Forgot about that. Reading this thread has me thinking how perfect this would be with a set of quality resonators.

[Malek@MRF]

Gentlemen,

Resonators are not to control rasp, they are for tonal control. It is the job of the mufflers to control rasp and secondly, drone. In some cases resonators can contribute to added rasp depending on their position within the system. They do their job by changing the frequency of the pressure wave, and some rely on pressure wave cancellation (the latter not applicable in this application).

We have tried many of the suggestions that are being made here 3 years ago with this system. It was a part of the R&D process to see what works and what doesn't work. I will reiterate that the Velaforza mid-section is designed to be paired with a rear section that was initially designed to be used with a high performance mid-section. Brands like Eisenmann, BMW MPE, AE and the like are not meant to be used with mid-sections like this. Brands like Akrapovic, the MRF rear section (no longer in production), Dinan, Active Autowerke can use this type of system. However, the two best systems I have experienced with this mid-section for tonal control have been the Akrapovic and the MRF. The stock rear section is the worst of them all in terms of rasp and simply being wild, but I will admit, after 4500 RPM, it is just shy of sounding like a true high revving race car and rather beautiful. Unfortunately we don't live at 4500 RPM's + all the time.

Here is a video of the MRF mid + MRF Rear.

[whats77inaname]

Originally Posted by Malek@MRF

It is the job of the mufflers to control rasp and secondly, drone.

Can't wait to see what it'll sound like w/the Corsa

[Malek@MRF]

Originally Posted by whats77inaname

Can't wait to see what it'll sound like w/the Corsa

Thank you for mentioning that. The Corsa system does a good job of controlling unwanted frequencies as well. It does well in general with catless mid-sections.

[lsmkr01]

Originally Posted by Malek@MRF

Gentlemen,

Resonators are not to control rasp, they are for tonal control. It is the job of the mufflers to control rasp and secondly, drone. In some cases resonators can contribute to added rasp depending on their position within the system. They do their job by changing the frequency of the pressure wave, and some rely on pressure wave cancellation (the latter not applicable in this application).

We have tried many of the suggestions that are being made here 3 years ago with this system. It was a part of the R&D process to see what works and what doesn't work. I will reiterate that the Velaforza mid-section is designed to be paired with a rear section that was initially designed to be used with a high performance mid-section. Brands like Eisenmann, BMW MPE, AE and the like are not meant to be used with mid-sections like this. Brands like Akrapovic, the MRF rear section (no longer in production), Dinan, Active Autowerke can use this type of system. However, the two best systems I have experienced with this mid-section for tonal control have been the Akrapovic and the MRF. The stock rear section is the worst of them all in terms of rasp and simply being wild, but I will admit, after 4500 RPM, it is just shy of sounding like a true high revving race car and rather beautiful. Unfortunately we don't live at 4500 RPM's + all the time.

Here is a video of the MRF mid + MRF Rear.

Thanks for the clarification.

[whats77inaname]

Originally Posted by Malek@MRF

Thank you for mentioning that. The Corsa system does a good job of controlling unwanted frequencies as well. It does well in general with catless mid-sections.

Research indicated that. Bad news is the tips aren't really my style. Good news is that the situation is rectifiable easily enough.

[lsmkr01]

Originally Posted by whats77inaname

Research indicated that. Bad news is the tips aren't really my style. Good news is that the situation is rectifiable easily enough.

Surprised you have not already gotten those black MRF tips put on your Corsa. Don't forget to post pictures when its done!

[whats77inaname]

Originally Posted by lsmkr01

Surprised you have not already gotten those black MRF tips put on your Corsa. Don't forget to post pictures when its done!

Not in a rush, given the 2-3 month lead time for the x-pipe to be produced. Putting everything on @ the same time, so it's all good.

[esquire]

gentlemen. this xpipe is admittedly expensive. in my mind the two main objectives of an exhaust system are sound and power. in both those regards the Mrf xpipe performs brilliantly. paired with the akra xpipe, it sounds like a pure f1 car from the outside and more than civilized on the inside of the cabin. as to the power, my other posts show that this system is making inordinate amounts of power. even without reference to any dyno, you can instantly feel the gain in power. and I'm coming from the akra xpipe which was already making substantial gains.

life experience has taught me that you get what you pay for. people who want sound and power will recognize the value of this system. of course there are people who have other objectives. this xpipe is probably not for them. in my experience this xpipe is the single most worthwhile mod I've made to the car. it's transformed my car into an absolute driving thrill. in that regard, this xpipe is well worth it. my two cents.

[lsmkr01]

Originally Posted by esquire

gentlemen. this xpipe is admittedly expensive. in my mind the two main objectives of an exhaust system are sound and power. in both those regards the Mrf xpipe performs brilliantly. paired with the akra xpipe, it sounds like a pure f1 car from the outside and more than civilized on the inside of the cabin. as to the power, my other posts show that this system is making inordinate amounts of power. even without reference to any dyno, you can instantly feel the gain in power. and I'm coming from the akra xpipe which was already making substantial gains.

life experience has taught me that you get what you pay for. people who want sound and power will recognize the value of this system. of course there are people who have other objectives. this xpipe is probably not for them. in my experience this xpipe is the single most worthwhile mod I've made to the car. it's transformed my car into an absolute driving thrill. in that regard, this xpipe is well worth it. my two cents.

Enough talking i'm ready to have this made and on my car already! A time frame until I have my hands on one should be coming soon.

[whats77inaname]

Originally Posted by lsmkr01

Enough talking i'm ready to have this made and on my car already!

+1

[lsmkr01]

Originally Posted by whats77inaname

+1

You ever call Malek to get an update?

[whats77inaname]

Originally Posted by lsmkr01

You ever call Malek to get an update?

Emailed him. Got an update. Gave my info. Still waiting for an invoice.