Any definitive comparisons on 2-2 vs 2-1 exhausts for 114 M8?
HDF Community Team
Joined: Sep 2013
Posts: 2,360
Likes: 2,319
From: Wisconsin
Nearly all exhausts work ok if the bike is tuned properly.
Select exhaust for appearance if you need a certain look and most importantly for the sound you like.
Performance is nice, however, the M8 engine in Stage II or more has adequate power with most any exhaust.
Select exhaust for appearance if you need a certain look and most importantly for the sound you like.
Performance is nice, however, the M8 engine in Stage II or more has adequate power with most any exhaust.
Thread Starter
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Tourer
Joined: Aug 2016
Posts: 415
Likes: 125
From: London, England
Fair points.
Im just overly cautious after I fitted the V&H Eliminators and it felt like I was riding through a swamp up to about 4K rpm. Baffles sorted it but it showed me how important backpressure is.
I got an email from Thrashin and that 2-2 pipe is coming out at some point so Ill wait for that.
Also the black V&H Upsweep 2-1 in Spring as a possible alternative.
Im just overly cautious after I fitted the V&H Eliminators and it felt like I was riding through a swamp up to about 4K rpm. Baffles sorted it but it showed me how important backpressure is.
I got an email from Thrashin and that 2-2 pipe is coming out at some point so Ill wait for that.
Also the black V&H Upsweep 2-1 in Spring as a possible alternative.
HDF Community Team
Joined: Oct 2018
Posts: 4,345
Likes: 3,392
From: Seattle
So I’ve been looking into this more, it’s mainly because I LOVE the low-mid range torque on the bike as it is so I don’t wanna lose that, but I’m not totally happy with the looks/sound so I’m trying to do as much research as I can before I spend like a 1000 on a new exhaust.
I’m not an expert when it comes to tuning, far from it but looking at this video from Blockhead on YouTube the numbers on a 131” show that whilst it’s super close, the 2-2 produces more torque. He mentions another M8 131 setup on a RK that’s also producing more torque with a 2-2 system.
Obviously this is on a Dyno and on the road/seat of the pants dyno might be a different story but it seems like it’s definitely not a clear cut difference.
Obviously that’s just a dyno
I’m not an expert when it comes to tuning, far from it but looking at this video from Blockhead on YouTube the numbers on a 131” show that whilst it’s super close, the 2-2 produces more torque. He mentions another M8 131 setup on a RK that’s also producing more torque with a 2-2 system.
Obviously this is on a Dyno and on the road/seat of the pants dyno might be a different story but it seems like it’s definitely not a clear cut difference.
Obviously that’s just a dyno
I messaged Chris on Instagram saying he should get Block to try a set of Thundertorque Inserts and he talked to Block about it, but Block decided to just go with the TBR instead.
One of the issues with 2 into 1s on the M8 is that a lot of them are getting a characteristic low end deadspot or dip that takes a lot of tuning effort to fix, it is fixable but it's a pain in the *** to do so.
Moonshine has been getting good results with the long pipes on the baggers, but ofc Softails dont have the length for long pipes. So you'd have to find a set of true duals that has length to it.
The M8 does not seem to like short exhausts.
Since you mentioned Thrashing Supply, check out their DogBalls anti reversion baffes. Moonshine has had great success with them.
I've also seen some people experiment with birdcage iron drawer ***** and mounting them in their pipes for reversion control.
Thread Starter
|
Tourer
Joined: Aug 2016
Posts: 415
Likes: 125
From: London, England
So a huge problem with Block's pipes before he swapped to the 2-1 is that bassani sweepers is the very short rear pipe and both have no reversion control whatsoever.
I messaged Chris on Instagram saying he should get Block to try a set of Thundertorque Inserts and he talked to Block about it, but Block decided to just go with the TBR instead.
One of the issues with 2 into 1s on the M8 is that a lot of them are getting a characteristic low end deadspot or dip that takes a lot of tuning effort to fix, it is fixable but it's a pain in the *** to do so.
Moonshine has been getting good results with the long pipes on the baggers, but ofc Softails dont have the length for long pipes. So you'd have to find a set of true duals that has length to it.
The M8 does not seem to like short exhausts.
Since you mentioned Thrashing Supply, check out their DogBalls anti reversion baffes. Moonshine has had great success with them.
I've also seen some people experiment with birdcage iron drawer ***** and mounting them in their pipes for reversion control.
I messaged Chris on Instagram saying he should get Block to try a set of Thundertorque Inserts and he talked to Block about it, but Block decided to just go with the TBR instead.
One of the issues with 2 into 1s on the M8 is that a lot of them are getting a characteristic low end deadspot or dip that takes a lot of tuning effort to fix, it is fixable but it's a pain in the *** to do so.
Moonshine has been getting good results with the long pipes on the baggers, but ofc Softails dont have the length for long pipes. So you'd have to find a set of true duals that has length to it.
The M8 does not seem to like short exhausts.
Since you mentioned Thrashing Supply, check out their DogBalls anti reversion baffes. Moonshine has had great success with them.
I've also seen some people experiment with birdcage iron drawer ***** and mounting them in their pipes for reversion control.
Its that low-end dip Ive noticed people mention and what I want to try and avoid. Im super happy with the performance on mine with the stock header and Eliminator mufflers, and the baffles act like torque inserts. It just doesnt sound great.
That upcoming Thrashin 2-2 mentioned above looks promising, its a full length pipe and has an additional bend near the swingarm so thatll help a bit too.
Seasoned HDF Member
Joined: Feb 2009
Posts: 5,642
Likes: 1,985
From: Cleveland Zoo
So a huge problem with Block's pipes before he swapped to the 2-1 is that bassani sweepers is the very short rear pipe and both have no reversion control whatsoever.
I messaged Chris on Instagram saying he should get Block to try a set of Thundertorque Inserts and he talked to Block about it, but Block decided to just go with the TBR instead.
One of the issues with 2 into 1s on the M8 is that a lot of them are getting a characteristic low end deadspot or dip that takes a lot of tuning effort to fix, it is fixable but it's a pain in the *** to do so.
Moonshine has been getting good results with the long pipes on the baggers, but ofc Softails dont have the length for long pipes. So you'd have to find a set of true duals that has length to it.
The M8 does not seem to like short exhausts.
Since you mentioned Thrashing Supply, check out their DogBalls anti reversion baffes. Moonshine has had great success with them.
I've also seen some people experiment with birdcage iron drawer ***** and mounting them in their pipes for reversion control.
I messaged Chris on Instagram saying he should get Block to try a set of Thundertorque Inserts and he talked to Block about it, but Block decided to just go with the TBR instead.
One of the issues with 2 into 1s on the M8 is that a lot of them are getting a characteristic low end deadspot or dip that takes a lot of tuning effort to fix, it is fixable but it's a pain in the *** to do so.
Moonshine has been getting good results with the long pipes on the baggers, but ofc Softails dont have the length for long pipes. So you'd have to find a set of true duals that has length to it.
The M8 does not seem to like short exhausts.
Since you mentioned Thrashing Supply, check out their DogBalls anti reversion baffes. Moonshine has had great success with them.
I've also seen some people experiment with birdcage iron drawer ***** and mounting them in their pipes for reversion control.
Grand HDF Member
Joined: Aug 2017
Posts: 3,585
Likes: 889
From: Nowhere
Awesome! Thanks for the detailed reply. I had a suspicion that might be the case.
It’s that low-end dip I’ve noticed people mention and what I want to try and avoid. I’m super happy with the performance on mine with the stock header and Eliminator mufflers, and the baffles act like torque inserts. It just doesn’t sound great.
That upcoming Thrashin’ 2-2 mentioned above looks promising, it’s a full length pipe and has an additional bend near the swingarm so that’ll help a bit too.
It’s that low-end dip I’ve noticed people mention and what I want to try and avoid. I’m super happy with the performance on mine with the stock header and Eliminator mufflers, and the baffles act like torque inserts. It just doesn’t sound great.
That upcoming Thrashin’ 2-2 mentioned above looks promising, it’s a full length pipe and has an additional bend near the swingarm so that’ll help a bit too.
From what I see so far from these posts looks like only advantage in 2in1 is higher HP while torque numbers are really close between the two but what do I know.
This is becoming really valuable post which I hope someone can refer to in the future as looks like there is a lot of material o these M8's on Touring platform but not so much on Softails so hope we can gather some good knowledge here for future reference. I also heard FM is gearing up to build dedicated Softail exhaust in late winter early spring so I really would like to see this come to life soon and hope to see some digitsa.
Hope to see more members to chime in as well.
Seasoned HDF Member
Joined: Feb 2012
Posts: 13,456
Likes: 10,452
From: Sunshine State
Exhausts always been the controversy. Read the link and decide where you wanna go
https://www.denniskirk.com/blog/2018...-a-comparison/
https://www.denniskirk.com/blog/2018...-a-comparison/
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Road Master
Joined: Oct 2008
Posts: 842
Likes: 284
From: UK
Yep its tough on softail M8's, also depends on motor size/headwork
Seen good results on a stg2 114 with a V&H pro -pipe=fits the criteria long pipe & volume muffler ,but a 128/131 with headwork primarys too small
but everyone wants a look, Fuel Moto got a new short pipe coming Show a graph how they cured the dip of most 2-1,softail not in prod yet bagger 1st,difference in the mounts i guess
Hard to compare with so many different builds
Seen good results on a stg2 114 with a V&H pro -pipe=fits the criteria long pipe & volume muffler ,but a 128/131 with headwork primarys too small
but everyone wants a look, Fuel Moto got a new short pipe coming Show a graph how they cured the dip of most 2-1,softail not in prod yet bagger 1st,difference in the mounts i guess
Hard to compare with so many different builds
Banned
Joined: Jan 2019
Posts: 3,036
Likes: 1,013
From: Nunya.
I like the sound of a 2 into 2 or 2into1 into 2, when you go 2 into 1 it's like going from stereo to mono . I know that the most of the 2 into 1 systems have great grunt but yea the sound is flat for me from a 2 into 1. The old days of straight loud pipes was awesome , I get they didn't help down low but man they sounded great when WOFO. lol