Hey guys i am gunna throw samson extreme bone shakers exhaust on my 2011 street bob i think it would look sick! www.samsonusa.com/E2-101.html i contacted samson and they said they would fit and they would coat in black ceramic for me plus military discount woohoo!!! ...but my question is will i need torque cones to keep low end torque? any comments would be greatly appreciated!

 

I would put either torque cones or baffles to add a bit of restriction or you will
lose all low end torque. my .03

 

AZrider is correct. The torque cones will help a lot with low to mid range performance. You need velocity in the exhaust as well as the right amount of back pressure to get best performance. The torque cones also give you an anti-reversion effect as well.
Thank you,
JR

 

Here's a write-up from NRHS with dyno numbers:

http://www.nrhsperformance.com/tech_arcones.shtml

 

Never yet seen dyno results improved by fitting torque cones to any exhaust on any bike. They only ever seem to drop the power across the piece. This might not be the case for a full-blown race engine but I don't think we are talking about anything like that here.

What is effective is a baffle, or a lollipop fitted across the exhaust outlet. They break up the reversion wave that can bounce back to the cylinder and mess with combustion on poorly designed exhaust systems, particularly systems without an expansion area and/or baffle.

PS - This is nothing to do with 'back pressure', which is a fallacy. The back pressure myth comes about because free-flowing exhausts have less of it and this led to leanness on carb bikes because they couldn't adjust for the extra air. This used to results in burnt exhaust valves. Torque cones would help a bit with this because they reduced the flow back towards more stock-like flow, which brought the AFR back from lean, not because they did some magic thing with back pressure.

 

Noticible improvement when I installed Torque cone on my 94 low rider with cycle shack drag pipes.

 

Torque cones will only help if your running nothing in your pipes. Like zero, zip, empty hollow tubes. Then they help with midrange torque. If your running baffles or lolipops, your fine.


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The item shown as a torque cone in the video has the shape of a venturi like in a carburator. This type of cone causes turbulence. The smooth bore torque cones by Samson have an entirely different design.
Thanks,
JR

 

Could you share your own dyno testing showing the improvements using your company's torque cones?

 

see i have seen so many people with mixed reviews of torque cones...but if i went baffles could i get a set that would still make the pipes sound as good and as loud while still getting the torque the i would otherwise loose? and what would fit these pipes...please help!!! thanks everyone for the comments