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[Yellow09SERG]

Getting ready to go 113 with 24D cam and head work. Presently have a V&H power duel headpipe with 4" Rineharts. While doing the motor work I will probably change the exhaust to some degree. Not a fan of the sound of the D&D, so they are not an option to me. How do the Power Duel headpipe with the Crushers compare to say the Drago Dracula or the Rush Wrath with a 2.25 or 2.50 baffle when it come to bottom end torque?

Thanks
David

[North Star]

The combo you mention of Power Dual headpipe and Crushers are probably the tuners/builders choice around here for a near perfect combo.

I think that a 2-1 on the more modern engines are not what they used to be on the older ones. I still hear of tuning issues, and am willing to bet there is not a whole lot of difference, if any, when compared against the 2-1-2 headpipe and good mufflers.

I'm in the same boat as you. My heads and cylinders are at GMR for his 113 kit, head rebuild and porting. I will be adding the GMR 600 cam, and 58 mm TB and 5.3 injectors. Every now and then I too consider going with the Dragula or Wrath, but I don't think I would benefit, except for a different sounding exhaust.

I presently run the Fullsac DX and 4" Rineharts. I LOVE the sound, but I also own a pair of my OEM CVO mufflers with 2" Fullsac cores, which everone suggests I put on instead of the Rineharts.

By the middle of April, I will put to rest any debate on this muffler question. I will have the bike dyno tuned with both mufflers, then decide which one to go with. If the Fullsac's blow away the Rineharts low end torque wise, I'll have to give them the nod. Any less of a contest than that, I will keep my Rineys.

[Yellow09SERG]

Thanks North Star. Be very interested in seeing what the difference is between the 2 mufflers. I like you love the sound of my Rineharts but if they are killing my bottom end I would make a change to something.

[Ridgerunr]

I've seen the V&H power dual head pipe and Crusher Mellow combo support 135hp. The DX with those muffs would do equally well.
Mellows have a "bark" when you get on it. Easy on the ears at Interstate speeds=touring. Best of both IME.

[Yellow09SERG]

I've seen the V&H power dual head pipe and Crusher Mellow combo support 135hp. The DX with those muffs would do equally well.
Mellows have a "bark" when you get on it. Easy on the ears at Interstate speeds=touring. Best of both IME.

Thank you Ridgerunr. Sure sounds like the Crushers are the way to go and will save me the money of a full exhaust vs a set of slip ons. How much difference is seen between the regular Crushers and the Mellows?

[hrdtail78]

From what I have seen.  The biggest general difference in the two style of exhaust is the shape of the curve.  The 2-1-2 usually has a triangular tq curve that produces a higher peak number.  The 2-1 usually has a flatter tq curve but more under the curve.

Cam choice will affect the outcome.  Overlap and exhaust duration will help dictate how much effect the exhaust will have on the shape of the curve.

I have used the Dragula, Wrath, and VH PD w/ crusher all with good results, but I don't have any good back to back testing.  I don't believe you can go wrong with any of the mentioned.

[Yellow09SERG]

From what I have seen.  The biggest general difference in the two style of exhaust is the shape of the curve.  The 2-1-2 usually has a triangular tq curve that produces a higher peak number.  The 2-1 usually has a flatter tq curve but more under the curve.

Cam choice will affect the outcome.  Overlap and exhaust duration will help dictate how much effect the exhaust will have on the shape of the curve.

I have used the Dragula, Wrath, and VH PD w/ crusher all with good results, but I don't have any good back to back testing.  I don't believe you can go wrong with any of the mentioned.

Thank you hrdtail. Sure sounds like being I  already have yhe V&H PD headpipe my best money would be spent on the Crushers and using the difference in $ to do clutch or something else that will add value.

Thank you all for the replies

[Ridgerunr]

I have read there is not much difference, power wise between the mellow and regular.

[North Star]

I have read there is not much difference, power wise between the mellow and regular.

Steve from GMR just responded to this same question in one of the 117 threads. His answer- none.

[Yellow09SERG]

I have read there is not much difference, power wise between the mellow and regular.

Steve (GMR) had replied to me on another thread had replied that there wasn't really any performance difference and that the only difference was in noise level.

[HOGMIKE]

I've noticed quite a performance increase when I switched from duals to 2 into 1
 

[Yellow09SERG]

I've noticed quite a performance increase when I switched from duals to 2 into 1
 

Mike I sure hope that one is still in your garage. Nice ride

[HOGMIKE]

Mike I sure hope that one is still in your garage. Nice ride

Thanks, it is.
 

[Ridgerunr]

I've noticed quite a performance increase when I switched from duals to 2 into 1
 

That squish pipe will get 'R done. 

[HOGMIKE]

That squish pipe will get 'R done. 

Correct!
The squish pipe alters the exhaust pulse from the front cylinder to help evacuate the rear and makes the head/cylinder run cooler, thus allowing more power.
I'm sure one of our engineers has all the math to support this theory.