Author Topic: 2:1 exhaust good power and clearance  (Read 2004 times)

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Offline Johnwesley

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2:1 exhaust good power and clearance
« on: September 02, 2019, 02:05:48 PM »
Looking at replacing the exhaust. The road rage I have scrapes when running the mountain roads. It has both head pipes going around the cam cover. The bottom pipe scrapes. Looking at other pipes I have run and like, they all seem to run the head pipes together in the same way. 
 Pic to help show what I mean





So Iím looking for a 2:1 that makes power and doesnít ring my ears while touring. The road rage I have is on the edge of upper noise level

Looking at these style pipes I see the merge collectors vary in placement, maybe a better way to say it, the head pipes are varying length. The Fatcat seems to have the longest primary and the propipe hs a little shorter, the shortest being the supper trap original style. Seems that that would change when the pipe likes to run. Iím leaning to either running the Fatcat louvered baffle, or the propipe. The engine is just a mild 90s hp 96Ē big bore in a 05 dyna.

Whatís seems to be the better pipe for general power 2800- 5500

Fat cat
SuperTrapp og
Pro pipe
Supermeg.

Iím open to other options, just would like to keep what hearing I have left and not kill the power. Maybe better to say I would like a nice power curve and not be louder than the road rage.

Online Barrett

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Re: 2:1 exhaust good power and clearance
« Reply #1 on: September 02, 2019, 02:32:32 PM »
The Fuel Moto E series is a good one. I like it better than the supermeg I had and it's a lot quieter than my Propipe.

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #2 on: September 02, 2019, 03:14:29 PM »
The Fuel Moto E series is a good one. I like it better than the supermeg I had and it's a lot quieter than my Propipe.

I looked at that pipe, issue is they do not make it for a 2005 dyna. I found an olde E pipe on e-bay, but it has the sample headpipe design

Offline IronButt70

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Re: 2:1 exhaust good power and clearance
« Reply #3 on: September 02, 2019, 05:15:31 PM »
FWIW I have the fatcat with the louvered baffle on my 17 flstc. Bike runs great BUT it is loud to my ear and I scrape the the muffler frequently on the twisties.(I scrape the left foot rest frequently too  :bike:) A dyna may give you more clearance on that.  :idunno:
Rollin down lifes hiway never looking back cuz something might be gaining on me

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #4 on: September 02, 2019, 05:48:22 PM »
FWIW I have the fatcat with the louvered baffle on my 17 flstc. Bike runs great BUT it is loud to my ear and I scrape the the muffler frequently on the twisties.(I scrape the left foot rest frequently too  :bike:) A dyna may give you more clearance on that.  :idunno:

That would be highly irritating, to swap pipes and have the same problem in a different spot. My Superglide is taller than factory. About an inch and a half front and rear. I like the sound and performance of the RR, could use a little help in the lower rpm ranges but pulls good where the cam works well at. The old school SuperTrapp has a upswept muffler so that may be a better bet than the FC.

Offline IronButt70

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Re: 2:1 exhaust good power and clearance
« Reply #5 on: September 02, 2019, 06:24:00 PM »
FWIW I have the fatcat with the louvered baffle on my 17 flstc. Bike runs great BUT it is loud to my ear and I scrape the the muffler frequently on the twisties.(I scrape the left foot rest frequently too  :bike:) A dyna may give you more clearance on that.  :idunno:

That would be highly irritating, to swap pipes and have the same problem in a different spot. My Superglide is taller than factory. About an inch and a half front and rear. I like the sound and performance of the RR, could use a little help in the lower rpm ranges but pulls good where the cam works well at. The old school SuperTrapp has a upswept muffler so that may be a better bet than the FC.
An upswept muffler may be your best bet. I have the TTS100 cam tuned with PV and it pulls hard from 2000 up to about 4500 which is what I prefer. Good luck with whatever you decide to go with.
Rollin down lifes hiway never looking back cuz something might be gaining on me

Offline misfitJason

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Re: 2:1 exhaust good power and clearance
« Reply #6 on: September 02, 2019, 09:47:36 PM »
Chopperhaus makes a pipe you wonít scrape.  Also a hpi pipe might be what the doctor ordered
2006 Dyna, Kraftech Evo Softail

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #7 on: September 04, 2019, 03:42:09 PM »
Hereís some of the best profile views I could come up with on the pipes. As you can tell the collectors are in different places on most of them with the fat cat being the furthest back, thus the longest primaries. The fat cat and the bassani both have stepped headers of the same size, but the bassani is serval inches shorter on the primaries. 








The above propipe seems to run the middle and also has the stepped headers primary length in between the rr and fc.







The above two pipes are very simular in layout but the SuperTrapp doesnít have stepped headers.

The big deal is how do these different pipes generally perform on the dyno with a little 95-98Ē build

Offline Deye76

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Re: 2:1 exhaust good power and clearance
« Reply #8 on: September 04, 2019, 04:15:51 PM »
Nicely done Dyna. Check out Supertrapp.
East Tenn.
2014 CVO RK, 2015 RGS, 1992 FXRP

Offline IronButt70

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Re: 2:1 exhaust good power and clearance
« Reply #9 on: September 06, 2019, 08:08:00 AM »
FWIW I have the fatcat with the louvered baffle on my 17 flstc. Bike runs great BUT it is loud to my ear and I scrape the the muffler frequently on the twisties.(I scrape the left foot rest frequently too  :bike:) A dyna may give you more clearance on that.  :idunno:

That would be highly irritating, to swap pipes and have the same problem in a different spot. My Superglide is taller than factory. About an inch and a half front and rear. I like the sound and performance of the RR, could use a little help in the lower rpm ranges but pulls good where the cam works well at. The old school SuperTrapp has a upswept muffler so that may be a better bet than the FC.
That added height on your dyna may give you the needed clearance for the fatcat. Would depend on how far you lean into the turns. If I had that extra height I probably wouldnít scape mine but my bike is set up more for touring than twisty riding. Decisions decisions.  :chop:
Rollin down lifes hiway never looking back cuz something might be gaining on me

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #10 on: October 07, 2019, 12:45:18 PM »
Through some more digging I saw a dyno done by durwood with the road rage I have on my bike. His thoughts on the 110Ē he did was a longer pipe would help with the left side torque with out hurting the right side. Timminator also believes the same. The last Time I spoke with him and also thinks finding a straight 1.75 head pipe would work better over all with my little motor.

Iím learning toward finding an old propipe that had 1.75 primaries straight through and see if it pulls up the left side more. It would be nice to find a clean used one.

Any other thought would be good to hear as well

Offline boooby1744

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Re: 2:1 exhaust good power and clearance
« Reply #11 on: October 08, 2019, 12:36:12 AM »
  [ You are not allowed to view attachments ]  RB Racing Spyder has 1 3/4 primaries. Loud without the optional sound attenuation packing. Well made and expensive.

Offline Sambo62

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Re: 2:1 exhaust good power and clearance
« Reply #12 on: October 08, 2019, 09:35:29 AM »
Quote
Through some more digging I saw a dyno done by durwood with the road rage I have on my bike. His thoughts on the 110Ē he did was a longer pipe would help with the left side torque with out hurting the right side. Timminator also believes the same. The last Time I spoke with him and also thinks finding a straight 1.75 head pipe would work better over all with my little motor.

Iím learning toward finding an old propipe that had 1.75 primaries straight through and see if it pulls up the left side more. It would be nice to find a clean used one.

Any other thought would be good to hear as well

You may be referring to my bike.  I'm running the short RR which Daren built and tuned.  Both agreed a longer pipe should help bottom end torque, but the RR was paid for at the time.  I would love to try a longer pipe with tune, all other things being equal, just to see impact of Bp/length on LH side torque.

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #13 on: October 08, 2019, 02:48:39 PM »
Quote
Through some more digging I saw a dyno done by durwood with the road rage I have on my bike. His thoughts on the 110Ē he did was a longer pipe would help with the left side torque with out hurting the right side. Timminator also believes the same. The last Time I spoke with him and also thinks finding a straight 1.75 head pipe would work better over all with my little motor.

Iím learning toward finding an old propipe that had 1.75 primaries straight through and see if it pulls up the left side more. It would be nice to find a clean used one.

Any other thought would be good to hear as well

You may be referring to my bike.  I'm running the short RR which Daren built and tuned.  Both agreed a longer pipe should help bottom end torque, but the RR was paid for at the time.  I would love to try a longer pipe with tune, all other things being equal, just to see impact of Bp/length on LH side torque.

I would love for you too as well :baby: for my own education. Especially since Iím running the same pipe as yours. When I read your posts I though it was their short pipe that has a collector by the cam cover. Then when you posted a pic I realized itís the same pipe Iím running. Really no big deal to me, but with the cornering clearance issue combined with a ďpossibleĒ better toque curve, and the fact that the pipe is not on the bike at the moment, I thought it was a good time to change. I have found a good deal on a pipe with substantially longer primaries that I may try unless some one comes up with a more definitive answer.

It would be nice to be close to a tuner that swaps used pipes around for customers to help dial in the combo, but thatís not happening around here with out investing a few thousand, and Iím not that curious.

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #14 on: November 09, 2019, 04:48:47 PM »
just as a follow up:
I settled on this one wasnít sure what the specks were but based on the pics it didnít look like it had a step in it, but I was wrong on that point. It has massive primaries so it may not have been the best for performance on such a small engine. Sounds good though and I like the look so weíll see how it performs once tuned in. Right now pulls really well up top.



Offline Deye76

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Re: 2:1 exhaust good power and clearance
« Reply #15 on: November 09, 2019, 06:12:07 PM »
This one give more clearance when your leaning? Hard to tell from the before & after pics.
East Tenn.
2014 CVO RK, 2015 RGS, 1992 FXRP

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #16 on: November 09, 2019, 06:36:03 PM »
This one give more clearance when your leaning? Hard to tell from the before & after pics.

That was the plan, and it is close. This one has lots more clearance under the cam cover, but the bend under the transmission hit just after the pegs touch. Itís possible this is an exercise that will cost to much for us unlucky folks who donít pick the right option first.

Offline Finn

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Re: 2:1 exhaust good power and clearance
« Reply #17 on: November 10, 2019, 10:23:25 AM »

Offline calgary56

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Re: 2:1 exhaust good power and clearance
« Reply #18 on: November 10, 2019, 01:47:38 PM »
« Last Edit: November 10, 2019, 01:54:28 PM by calgary56 »
Live Long, ... Out Ride the Reaper !

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #19 on: November 10, 2019, 03:44:10 PM »

John,
may I ask what that fairing is?

Thatís a fxrt repop fairing made by JD customs.

Offline Johnwesley

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Re: 2:1 exhaust good power and clearance
« Reply #20 on: November 10, 2019, 03:48:13 PM »
Lift it, cheaper than some pipes

2Ē extended fork tubes
http://www.tcbroschoppers.com/gold-titanium-nitride-coated-fork-tubes-2-length-41mm-for-fxst-fxdwg-dyna-wide-glide.html [tcbroschoppers.com]

or slider tube extensions
https://www.denniskirk.com/cycle-visions/39mm-2-in-fork-tube-extensions-cv-7139.p585971.prd/585971.sku


2000 Ė 2005 Dyna Swing Arm Lift kit
http://www.bungking.com/swing-arm-lift-kit/ [bungking.com]

Thanks for the links, I have already worked the suspension over. The fork internals have been changed out for a cartridge and firmer springs. Stock I had 3Ē sag and now Iím running 1.5Ē on the rear I have 14Ē ohlins. I have been looking at doing the 2Ē extend forks, at that point a longer kick stand will be a must.

Offline Deye76

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Re: 2:1 exhaust good power and clearance
« Reply #21 on: November 10, 2019, 04:29:14 PM »
I have 2" + tubes (standard OE) on my FXRP, even on the banked switchbacks feel like I'm going tip over LOL. Any HD will not be better than a sport bike, in capable hands in negotiating tight angles. Get a pipe you like, ride your bike within it's limitations and have fun. Or, switch bikes. Best wishes.
East Tenn.
2014 CVO RK, 2015 RGS, 1992 FXRP

Offline calgary56

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Re: 2:1 exhaust good power and clearance
« Reply #22 on: November 10, 2019, 04:46:09 PM »
Find out what this guy is running .....


https://www.youtube.com/watch?v=cMVLxQ53Vgw
Live Long, ... Out Ride the Reaper !

Offline calgary56

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Re: 2:1 exhaust good power and clearance
« Reply #23 on: November 10, 2019, 04:52:03 PM »
I have 2" + tubes (standard OE) on my FXRP, even on the banked switchbacks feel like I'm going tip over LOL. Any HD will not be better than a sport bike, in capable hands in negotiating tight angles. Get a pipe you like, ride your bike within it's limitations and have fun. Or, switch bikes. Best wishes.

https://www.lordsofgastown.com/products/bung-king-kickstand-lift-block

Live Long, ... Out Ride the Reaper !

Online PoorUB

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I am an adult?? When did that happen, and how do I make it stop?!