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Author Topic: Dyno test! Fullsac 2.5 baffles with no tuning!  (Read 1902 times)

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Fullsac Performance

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Dyno test! Fullsac 2.5 baffles with no tuning!
« on: January 31, 2022, 03:51:53 PM »

I have been getting a lot of inquiries about low end TQ loss with the 2.5 baffles and the stock cat headpipe. We all know what big baffles do to the low end with a good non cat headpipe. Pretty much kill it. Having never tested with a stock cat headpipe other than baseline pulls on a stock bike. I just assumed the low end would suffer in some way even on a bone stock bike with huge 2.5 baffles. Was I ever wrong. In comes a good friend of mine with a brand new 2021 114 SGS. He just wanted noise and didn't care about power. Into the dyno room for a few base line pulls. Pulled the stock 114 mufflers installed the 2.5 baffles. A few more pulls later, man was I surprised! It actually gained low end Tq from the hit with an 8 FT pound gain in the mid range. AFR was right at 12.5 all the way through. Still learning! Lol..

steve@fullsac.com
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hogsty

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Re: Dyno test! Fullsac 2.5 baffles with no tuning!
« Reply #1 on: January 31, 2022, 09:21:18 PM »

Verrrrrrry interesting.

Thanks for sharing that. 
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FLSTFI Dave

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Re: Dyno test! Fullsac 2.5 baffles with no tuning!
« Reply #2 on: February 01, 2022, 07:00:50 AM »

Wow, that is quite interesting.  Nice gain in the mid range for a stock bike, no tune.
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Fullsac Performance

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Re: Dyno test! Fullsac 2.5 baffles with no tuning!
« Reply #3 on: February 02, 2022, 11:25:43 AM »

Hey Dave!
Part of the gain was the AFR correcting its self. With the stock mufflers it was down in the low 11s. The big baffles leaned it out to a near perfect 12.5 at full throttle. First Harley I ever seen fix itself. Lol..

Steve



Wow, that is quite interesting.  Nice gain in the mid range for a stock bike, no tune.

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tlr

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Re: Dyno test! Fullsac 2.5 baffles with no tuning!
« Reply #4 on: February 02, 2022, 03:40:15 PM »

Steve,

What about if I installed the 2.25's with your header but no tune? I think I know the answer, but since the TTS is out of stock is that a reasonable option.
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Fullsac Performance

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Re: Dyno test! Fullsac 2.5 baffles with no tuning!
« Reply #5 on: February 02, 2022, 05:19:53 PM »

Steve,

What about if I installed the 2.25's with your header but no tune? I think I know the answer, but since the TTS is out of stock is that a reasonable option.

I would suggest the 2.0 baffles with out tuning just to be safe.

Steve
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