Question about power cones : V-Twin Forum: Harley Davidson Forums

pacaver · 02-05-2007, 09:17 AM

I have a full dresser that I've always ran straight pipes on it. It currently has a 124" S&S motor in it and it's loud. I tried putting baffles in it and it just doesn't sound right so I took them out. I'm putting a new exaust system on it that is 1.75 ID and was wondering if power cones would increase the performance or if with such a large motor that they would decrease the performance. I'm still planning on running staight pipes.

Fatb0y · 02-05-2007, 10:21 AM

Straight pipes are horrible for performance for the street no matter what you do. They are for WOT use only. You should run something like Rineharts or something that is a true dual with the performance baffle or run the Fatcat Boarzilla which would be an even better choice. You would get the true performance from your motor that way.

Just my 2 cents.

Booggerbe · 02-05-2007, 10:34 AM

Like FatBoy said. Your performance will be way down and all you will be doing is making alot of noise. The torque cones are not what they are built up to be . just do a good exhaust system and you will be performance ahead.............................OOOOOOOOOOoooooo ooo and by the way Fatboy where have you been. Long time no hear from you... Booggerbe

Fatb0y · 02-05-2007, 12:00 PM

Quote:

Originally Posted by Booggerbe

Like FatBoy said. Your performance will be way down and all you will be doing is making alot of noise. The torque cones are not what they are built up to be . just do a good exhaust system and you will be performance ahead.............................OOOOOOOOOOoooooo ooo and by the way Fatboy where have you been. Long time no hear from you... Booggerbe

Besides working, working. :P It is that time of year.

GRock · 02-05-2007, 04:26 PM

Those cones are just a restriction, (baffle) farther up the pipe. You want loud?..... there are some pipes that will roar pretty well and give good performance, but if you are dedicated to straights you are just trying to fix a bad set up with a bandaid.

YankeeBob · 02-05-2007, 04:31 PM

And with a 124" you should be using 2" pipes. Check out the Boarzilla.

pacaver · 02-08-2007, 07:32 AM

I've ordered the T-Rex duals and I really don't want to run baffles, I really wouldn't mind it being a little quiter, but even the small baffles change the tone so much, espiecially when you let off the gas.
Anyway I guess everyone thinks the power cones are a waste of time then?
YankeeBob, I don't know what a boarzilla is to check it out.

YankeeBob · 02-08-2007, 07:55 AM

Quote:

Originally Posted by pacaver

I've ordered the T-Rex duals and I really don't want to run baffles, I really wouldn't mind it being a little quiter, but even the small baffles change the tone so much, espiecially when you let off the gas.
Anyway I guess everyone thinks the power cones are a waste of time then?
YankeeBob, I don't know what a boarzilla is to check it out.

This is a D&D Boarzilla for a softtail. I didn't see one listed for an FLH......http://www.danddexhaust.com/catalog/2005/07/46332b.htm

But anyways, this is what one is.

FXR2 · 02-08-2007, 08:26 AM

Quote:

Originally Posted by pacaver

I have a full dresser that I've always ran straight pipes on it. It currently has a 124" S&S motor in it .... I'm putting a new exhaust system on it that is 1.75 ID and was wondering if power cones would increase the performance or if with such a large motor that they would decrease the performance. I'm still planning on running staight pipes.

Judging from the other responses, I may be in the minority about torque, or "anti-reversion" cones, but I think they work. You have a much larger motor and I would agree with another here about questioning your use of 1.75 dia. pipes instead of 2 inch, but at any rate, my case may not apply to your situation, but here's my experience.

I have a mildly modified Evo 80. SE heads, SE igntion, EV27 cam, stock pistons. When I went from aftermarket staggered dual pipes with baffled mufflers to V&H Straight Shots, I got exactly what I expected, since the V&H pipes are essentially straight pipes with a louvered sleeve baffle in the tailpiece. That was a noticeable loss of low-end torque and a just as noticeable increase in power above 3000 RPM. Even though I wasn't surprised, I wondered if I could recover at least some of the lost low end with these cones, so I put a pair in. I don't have any dyno sheet data, but by seat of the pants, the low end I got back after installing the cones is just as obvious as the loss when I first went to the V&H pipes. Now, I'm back to my starting point low-end wise and the bike still runs better above 3000 RPM so I'm happy, and a believer in torque cones. The difference is not overwhelming, understand, but detectable by just SOP nonetheless.

Then again, if I had the output of a 124, I may not have bothered with looking for a couple of lost ft-lbs.

pacaver · 02-08-2007, 09:12 AM

Thanks YankeeBob, I took a look at them but I don't think I could run a 2into1 on a harley even if it doubled the HP, looks like *** bike parts.
FXR2, The only reason I'm going to the 1.75 ID pipes is that is all Hard Krome offers in the T-Rex and that is the look I'm going for. I'm currently running sampson long shots

duhast · 02-08-2007, 09:45 AM

Quote:

I don't think I could run a 2into1 on a harley even if it doubled the HP, looks like *** bike parts.

Even if it doubled hp? Seems to me that you aren't really concerned with performance then.

Form Follows Function.

pacaver · 02-08-2007, 03:57 PM

not performance at any cost, I want a paticular look and sound with as much HP and torque as I can get out of the package. If I just wanted to go fast and didn't care about look's or sound I would buy a hayabusa

vindex1963 · 02-08-2007, 05:35 PM

Quote:

Originally Posted by pacaver

I took a look at them but I don't think I could run a 2into1 on a harley even if it doubled the HP, looks like *** bike parts.

Hey.......

pacaver · 02-08-2007, 07:21 PM

sorry, no offense , I just don't like that look

jkeenan213 · 02-08-2007, 09:05 PM

I have a set of power cones, you can have 'em for the shipping. If you don't like 'em, I just ask you send 'em back. My guess shipping both ways maybe $10, $5 if they work for you. They obviously didn't for me. Bike came with V&H long shots, no baffles. They're available too, but not for shipping...hehehe. And for Dyna.

Drag pipes are great for...drag racing. Odd machines, Harleys. They work best with strong inhale although you can overdo it, the appropriate exhale is a much more complicated calculation and more is not better.