Has anyone tried a full exhaust? or just a header replacement?

[Tazmool 134]

Hello Everyone, 

Something I have been wondering about, 
The T7 has the catalytic converter in the header, to get rid of it (and remove some weight & restriction) you would need to replace the header pipe.

Has anyone replaced the header?  (is it possible to do this with out removing the radiator?)

What is the weight savings? (if any)
If using the stock muffler, did the exhaust noise level go up? 
I'm guessing an ecu flash is necessary to compensate for the extra flow? 

Any other advantages to doing this? 

Any thoughts and experiences welcome!

 

Tazmool

[Cruizin 1,664]

This engine is same as the MT07, and on that bike you can gain up to 9-10 hp by changing exhaust and having the "right" matched tune flashed to the ECU.  Over on the MT07 forum, @2 Wheel DynoWorks has flashed over a thousand of these bikes and has tunes and dyno charts for many of the most common exhausts. This forum will be full of their dyn charts as soon as they/we get our bikes here in a few weeks. 

 

Here is a dyno chart for their MT07 (again same engine) Graves full titanium exhaust/matched tune package. 9 hp increase, good Tq increase as well. 

 

 

 

Stock is 63 hp. Any dyno shop that claims more power stock is running an uncalibrated dyno with BS numbers. Believe me, 2wdw's dyno is always calibrated on spec.   They can get us up around 70 hp or more, but still in the safe zone. 

 

As far as weight savings? We don't know yet. 

[Tazmool 134]

Thanks for the info, those are some pretty nice gains from a full exhaust and ecu flash. 
If the noise level increase is small, I think that will be in the cards for my Future T7.   I would like to retain a relatively quiet (close to oem) sound so the bike is still fun to ride long distances. 

I am thinking primarily of the weight savings, the tucked up exhaust (high exit pipe) and reduced heat by not having the catalytic converters in the header.  This would be achieved with the Huzar high pipe I already have, and some kind of de-cat header (possibly even just a y-pipe where you cut off the cats and slip on a link pipe, my R6 was done this way)

This would end up with a bit of a frankenstein exhaust (so no exact match ecu flash), but it would achieve the tri-goals of, not expensive, high exit pipe, and removed cats.  Power gains would be icing and a side benefit (I am definitely going to get a ecu flash with or without the header change) 

 

Tazmool

[Cruizin 1,664]

13 minutes ago, Tazmool said:

Thanks for the info, those are some pretty nice gains from a full exhaust and ecu flash. 
If the noise level increase is small, I think that will be in the cards for my Future T7.   I would like to retain a relatively quiet (close to oem) sound so the bike is still fun to ride long distances. 

I am thinking primarily of the weight savings, the tucked up exhaust (high exit pipe) and reduced heat by not having the catalytic converters in the header.  This would be achieved with the Huzar high pipe I already have, and some kind of de-cat header (possibly even just a y-pipe where you cut off the cats and slip on a link pipe, my R6 was done this way)

This would end up with a bit of a frankenstein exhaust (so no exact match ecu flash), but it would achieve the tri-goals of, not expensive, high exit pipe, and removed cats.  Power gains would be icing and a side benefit (I am definitely going to get a ecu flash with or without the header change) 

 

Tazmool

Well no. the noise increase with full exhasut will be quite louder than stock. And thats why Im considering staying stock but still getting the ECU flashed.  @2 Wheel DynoWorks do you have a stock exhaust fz07 dyno chart to share? 

[Aleksandar13 877]

14 minutes ago, Tazmool said:

Thanks for the info, those are some pretty nice gains from a full exhaust and ecu flash. 
If the noise level increase is small, I think that will be in the cards for my Future T7.   I would like to retain a relatively quiet (close to oem) sound so the bike is still fun to ride long distances. 

I am not sure maybe others can relate but mine has a slip on that is qualified as a race Exhaust and it is on the loud side, wouldn't want to go on the motorway for hours with the bike.. But there is always a but and maybe @Cruizin can help tell us if the bike is quieter with a tune?

I had other cars that had a tune and went quiet even with full 3 inch exhaust and no cats being Naturally aspirated.. If this is the case on the cp2 engine would interesting to know. 

Aleks 

[Tazmool 134]

I know a full race exhaust can be very, very loud, been there, done that. 
However, in the past, I have matched a street aftermarket muffler, and a "race" header, and ended up with a bike that was reasonably quiet (could be toured on easily) yet still had nice weight savings and power bump.   

 

I can see a proper tune lowering the exhaust noise a bit, going from lean, and popping, to proper rumble would be an improvement.  

One advantage of the cp2 engine is that it does not appear to have a pair system, os that is one less thing to mod/worry about (and no popping sound with pipe change)

 

I think the exhaust setup I'm going to try is the Huzar high exhaust, and Dominator header, with 2wdw ecu flash.  
That is once my bike shows up, is broken in well, and I am ready to tinker with it a bit (instead of riding it) 

So, its going to be a while

Tazmool

[Aleksandar13 877]

1 hour ago, Tazmool said:

I know a full race exhaust can be very, very loud, been there, done that. 
However, in the past, I have matched a street aftermarket muffler, and a "race" header, and ended up with a bike that was reasonably quiet (could be toured on easily) yet still had nice weight savings and power bump.   

 

I can see a proper tune lowering the exhaust noise a bit, going from lean, and popping, to proper rumble would be an improvement.  

One advantage of the cp2 engine is that it does not appear to have a pair system, os that is one less thing to mod/worry about (and no popping sound with pipe change)

 

I think the exhaust setup I'm going to try is the Huzar high exhaust, and Dominator header, with 2wdw ecu flash.  
That is once my bike shows up, is broken in well, and I am ready to tinker with it a bit (instead of riding it) 

So, its going to be a while

Tazmool

I have not considered a full system yet as I want to get the Air Filter and tune first with the current exhaust and see where this takes me..also not to worried about couple of hp to be honest...more about getting rid of the dip in power @9k rpm and being safe with the engine..  

[DoYouLikeItHere 18]

On 5/18/2020 at 10:46 PM, Tazmool said:

I know a full race exhaust can be very, very loud, been there, done that. 
However, in the past, I have matched a street aftermarket muffler, and a "race" header, and ended up with a bike that was reasonably quiet (could be toured on easily) yet still had nice weight savings and power bump.   

 

I can see a proper tune lowering the exhaust noise a bit, going from lean, and popping, to proper rumble would be an improvement.  

One advantage of the cp2 engine is that it does not appear to have a pair system, os that is one less thing to mod/worry about (and no popping sound with pipe change)

 

I think the exhaust setup I'm going to try is the Huzar high exhaust, and Dominator header, with 2wdw ecu flash.  
That is once my bike shows up, is broken in well, and I am ready to tinker with it a bit (instead of riding it) 

So, its going to be a while

Tazmool

Tazmool, Has your T7 been delivered to you yet?
Do you have your Huzar Exhaust mounted ? It looks nice enough.

What are your thoughts on if it might burn my boot or my plastic?

I'm still waiting for my blue bike to arrive but I did get the free gift bag today
I own an XSR900 and modified my stock exhaust quite a bit. The next step for it would have been to remove the cat while keeping the oem system. I could easily just hog out the cat on the 900. I have not seen the T7 yet...

[Tazmool 134]

Aleksandar13, I agree a few extra hp is not really worth pursuing at great cost, however a few extra hp and above that, better fueling is worth looking into. 

My goal with swapping out some exhaust bits is to reduce some weight, but primarily to get the exhaust out of the way (thats why I got my Huzar high exit pipe) and the header, just for fun, get rid of the cats and the heat they throw out (maybe a tad less weight too)  

DoYouLikeItHere, I don't have my T7 yet, hoping it will show up soon, but my dealer still knows nothing.
I don't think the high pipe will be in the way of the boots or luggage (it seems to be tucked out of the way well enough) but I won' t know for sure until I have the bike and the pipe is mounted.  A lot has to happen between that and where I'm at now (which is no bike in garage) 

 

Tazmool

[Aleksandar13 877]

15 minutes ago, Tazmool said:

Aleksandar13, I agree a few extra hp is not really worth pursuing at great cost, however a few extra hp and above that, better fueling is worth looking into. 

My goal with swapping out some exhaust bits is to reduce some weight, but primarily to get the exhaust out of the way (thats why I got my Huzar high exit pipe) and the header, just for fun, get rid of the cats and the heat they throw out (maybe a tad less weight too)  

DoYouLikeItHere, I don't have my T7 yet, hoping it will show up soon, but my dealer still knows nothing.
I don't think the high pipe will be in the way of the boots or luggage (it seems to be tucked out of the way well enough) but I won' t know for sure until I have the bike and the pipe is mounted.  A lot has to happen between that and where I'm at now (which is no bike in garage) 

 

Tazmool

Good luck with the project... Look forward to seeing your set-up and how it performs. 

Aleks