2 into 1 Exhaust ... Q

[mousitsas]

But less humidity.
However...yet another dyno which says nothing since there is no AFR curve.

[Korruptio]

Originally Posted by mousitsas

But less humidity.
However...yet another dyno which says nothing since there is no AFR curve.

How about getting YOUR bike on dyno and getting the needed curves instead of bitching here about how other people are not providing such? :)

[mousitsas]

Originally Posted by Korruptio

How about getting YOUR bike on dyno and getting the needed curves instead of bitching here about how other people are not providing such? :)

My friend, I believe that the reason why you took the effort to go to a dyno twice and post the results here is to compare your setups, 2-2 vs 2-1. All I said is that there is no conclusion to be had without an AFR curve if one wants to compare two exhaust setups. If you interpreted this as 'bitching', I hold no responsibility. Take care now.

[Strokizator]

Since horsepower is a function of torque x rpm, torque and horsepower dyno curves intersect at 5252 rpm, at least here in the US. The graphs posted by Korruptio show the intersection around 7100 rpm. Is this due to the use of metric numbers or is there some other explanation? I'd like to learn something today.

[tahoeacr]

Originally Posted by Nailhead

I don't believe that is so: the oxy sensor & ECU will maintain a stoichiometric condition (on a 990 obviously) with a smaller pipe. Engine power would decrease with this, though.

0-2 sensor only works in closed loop. And really, not that well even then. The A/F ratio needs to be pretty close for it to compensate enough. Most seem to be below 12-15%TPS and under 4K on stock maps.

[hvman]

After reading the entire thread, it seems some remap, some don't. I have an 09 990 with 2 into 1 remus Ti. I have run the original map, the Akro, and a 2011 stock map, there is very little difference. The reason I was trying the different maps is I get a lot of popping on deceleration, with each. Is that the normal with this set-up? thanks

[moto-treks]

Originally Posted by hvman

After reading the entire thread, it seems some remap, some don't. I have an 09 990 with 2 into 1 remus Ti. I have run the original map, the Akro, and a 2011 stock map, there is very little difference. The reason I was trying the different maps is I get a lot of popping on deceleration, with each. Is that the normal with this set-up? thanks

I have the same setup on an '10. No popping at all and I'm running the 2011R map. I'd check your gaskets between the header and the 2-into-1 pipe. You may have an air leak.

[hvman]

thanks moto-treks, my roxx 2 into 1 pipe has no provision for clamping or gaskets of any kind, maybe I need to try and seal those joints better to see if that is the cause. thanks for the tip, it would be nice if that cures the prob.

[kaia]

anyone with the 2 into 1 and the FMF Q4 Titanium able to record a video & post it here? (similar to the one earlier in this thread with the remus) trying to decide between the two, and i'm not sold on the more expensive 2 into 1 roxx.

thanks!

[tomdubz]

Originally Posted by hvman

After reading the entire thread, it seems some remap, some don't. I have an 09 990 with 2 into 1 remus Ti. I have run the original map, the Akro, and a 2011 stock map, there is very little difference. The reason I was trying the different maps is I get a lot of popping on deceleration, with each. Is that the normal with this set-up? thanks

After installing my GPR 2:1 complete system, I had lots of popping on decel. Leaving the stock map ('09-990 also) and performing SAS/Cannister-ectomies did away with the popping. Just my experience.

[Nut Clutch]

Originally Posted by hvman

thanks moto-treks, my roxx 2 into 1 pipe has no provision for clamping or gaskets of any kind, maybe I need to try and seal those joints better to see if that is the cause. thanks for the tip, it would be nice if that cures the prob.

You need some high temp copper silicone. That's what I used on mine.

http://www.motorcycle-superstore.com...t-Sealant.aspx

Makes installation quite easy and seals without issue.

[JGE]

Originally Posted by hvman

After reading the entire thread, it seems some remap, some don't. I have an 09 990 with 2 into 1 remus Ti. I have run the original map, the Akro, and a 2011 stock map, there is very little difference. The reason I was trying the different maps is I get a lot of popping on deceleration, with each. Is that the normal with this set-up? thanks

I also have the Remus ROXX system (beautiful and sounds great in case anyone was wondering) and also have lots of popping on decel. From reading I'm more inclined to side with tomdubz and say it is the emissions equipment causing the popping. I have the SAS blocking plates but just have not had time to install them yet. Will report back if popping still exists after install.

[hvman]

Originally Posted by Nut Clutch

You need some high temp copper silicone. That's what I used on mine.

http://www.motorcycle-superstore.com...t-Sealant.aspx

Makes installation quite easy and seals without issue.

installation complete, will report results Wed. thanks all!

[ian408]

Originally Posted by kaia

anyone with the 2 into 1 and the FMF Q4 Titanium able to record a video & post it here? (similar to the one earlier in this thread with the remus) trying to decide between the two, and i'm not sold on the more expensive 2 into 1 roxx.

thanks!

I have the standard aluminum Q4. Don't think the material affects the sound that much.

[Nut Clutch]

Originally Posted by ian408

I have the standard aluminum Q4. Don't think the material affects the sound that much.

Not the material that makes the difference. The collector on the 2 into 1 on the Roxx merges to a much larger smoother diameter. Look earlier in this thread. I posted photos and measurements. I have had a FMF Q4 with the adv 2 into 1 and also the Roxx. Big difference between the two.