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  #1  
Old 3rd April 2014
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Default Where is there a huge dyno test of most exhausts?

I'd like to build a second bike someday and I'm always looking at differant exhausts, slip ons or complete systems.
Is there a page somewhere that compares LOTS of different exhaust on a dyno?
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Old 3rd April 2014
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Default Search "Hammer Performance" to find their sticky posts

They have dyno tests of several exhausts you can look at on the forum, with some good discussion.
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Old 3rd April 2014
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Liz is correct, Hammer has done a ton of dyno tests. They have them all on their website here:

http://hammerperf.com/ttxlexhaust.shtml

Often there are other tidbits in the various threads here on the XLF. Check out their stickies in their section of the forum here:

http://xlforum.net/vbportal/forums/f...play.php?f=331
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  #4  
Old 3rd April 2014
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Quote:
Originally Posted by Screw Loose Dan View Post
Liz is correct, Hammer has done a ton of dyno tests. They have them all on their website here:

http://hammerperf.com/ttxlexhaust.shtml

Often there are other tidbits in the various threads here on the XLF. Check out their stickies in their section of the forum here:

http://xlforum.net/vbportal/forums/f...play.php?f=331
Wow. Yeah I wanted to see how good the thunderheader was. It looks like the cycle shacks with the baffle removed is just about the best. Probably any slip on without a baffle would do great. Less is more.
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Old 3rd April 2014
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Default

The unbaffled Cycle Shacks did come real close to the Patriot on the top number, that's true ...



However, they have a massive hole from 3500 to 5500 as you can see.

You see much the same thing in the unbaffled Short Shots:



Bottom line, an open 2 into 2 is tuned for a certain rpm range, mostly by virtue of it's overall length. On the other hand, a well-designed 2 into 1 can pull well over a wider range.

But then again, a poorly designed 2 into 1 works over a narrow range too ... case in point, the RSD Slant:



Works great down low, sucks above 5000.
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Old 3rd April 2014
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Default

ok…not trying to hi-jack the thread, but this has piqued my curiosity. I have a converted 1200, n-8 cams, short-shots w/baffles and a Arlen Ness A/C…The bike runs great, pulls hard everywhere except out of the hole. If I read the chart correctly, does it mean that by pulling the baffles I would gain more top HP at the expense of my mid-range? I've had numerous people tell me to pull the baffles for more power, but since I don't ride at redline much, is it better to keep the baffles and keep the mid-range power where most of my riding is done in? These charts are very interesting, indeed.
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Old 3rd April 2014
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Default

What RPM is the limiter set at stock on an '04 883?

I didn't want this to turn into a back-pressure duscussion and I know I've posted this in many other threads, but:

My bike came with SE AC and straight through slip ons. It pulled like a MoFo up past 100mph! I made my own 2-1 with a straight through glass pack but put in torque cones.
1. I honestly can't feel any mid range power gain.
2. It now won't go past 98mph.
3. I bought one of those 8" slip in baffles off ebay and it made the bike a total dog.
Bottum line, I'll never run baffles again!
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  #8  
Old 4th April 2014
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Quote:
Originally Posted by dpd1413 View Post
ok…not trying to hi-jack the thread, but this has piqued my curiosity. I have a converted 1200, n-8 cams, short-shots w/baffles and a Arlen Ness A/C…The bike runs great, pulls hard everywhere except out of the hole. If I read the chart correctly, does it mean that by pulling the baffles I would gain more top HP at the expense of my mid-range? I've had numerous people tell me to pull the baffles for more power, but since I don't ride at redline much, is it better to keep the baffles and keep the mid-range power where most of my riding is done in? These charts are very interesting, indeed.
The quick and simple answer IMO, yes.
If your a typical street rider, you want the power where you use it everyday, usually between 3,000 - 5,000 RPM.
If you're into high RPM (drag racing), then you want the power on the top end.
No baffles typically = poor low to mid range torque.
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  #9  
Old 4th April 2014
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Default

Quote:
Originally Posted by Jimmy_Hoffa View Post
What RPM is the limiter set at stock on an '04 883?

I didn't want this to turn into a back-pressure duscussion and I know I've posted this in many other threads, but:

My bike came with SE AC and straight through slip ons. It pulled like a MoFo up past 100mph! I made my own 2-1 with a straight through glass pack but put in torque cones.
1. I honestly can't feel any mid range power gain.
2. It now won't go past 98mph.
3. I bought one of those 8" slip in baffles off ebay and it made the bike a total dog.
Bottum line, I'll never run baffles again!
think it has more to do with the pipe not being right over the baffle you installed. sounds like the homemade pipe is hurting you.
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