Dyno difference in d&d fatcat baffles
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Dyno difference in d&d fatcat baffles
I recently changed cams in my 2012 FLHX. Here is my set up -103", Stock flat top pistons, .030 head gaskets, SE 259e cams, Burley heads, SE Pro tuner, SE Heavy Breather, D&D fat cat. The attached dyno sheet is comparing this build with two different mufflers, a louvered wrapped, and a perforated. You can see the Perforated muffler made more Tq. but less Hp., but also the perforated muffler came on a lot later in the RPM range and also lost out by a little after 5000 RPMs. I didn't ride the bike with both mufflers, and chose to stay with the Louvered muffler for two reasons, First the Louvered muffler is more tolerable, and in my opinion better sounding, and second I think the earlier Tq. with the Louvered muffler is going to be more beneficial. What do you think?
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I've been running a louvered baffle in mine for several years, and recently acquired a perforated baffle muffler. (actually it was a concentric and I removed the 'quiet' part) I think either will work fine, and agree that the slight additional torque at low rpm will be welcome, so, I guess it comes down to sound preference. I'm gonna throw this other baffle on mine soon and see what it sounds like. Louder, I'm sure...
I don't know what your riding style is, but for me the louvered would be the best. I like the way the torque comes up quick and then levels out through the whole range. As far as bragging rights everybody worries about HP anyway, so you get the best of both worlds, a bike that pulls great through the range and makes top HP.
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Tim Wayne C
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Jan 10, 2021 08:38 PM
