CVO Technical > Twin Cam
117 TC Dyno Test. Stock CVO Ventilator VS Open TB
Fullsac Performance:
--- Quote from: FLSTFI Dave on May 27, 2020, 06:50:11 AM ---I agree. The Heavy breather was great on the Twin Cam.
The heavy breather is not good for performance on the M8. Mine was replaced with the Heavy Breather Extreme, and added bonus is the Extreme has more leg room the the Heavy breather.
--- End quote ---
Very accurate info Dave. I just tuned a mild 130" M8 and finished up at 149 HP. The Heavy Breather was showing a 7 HP loss vs open TB. :'(
Steve@fullsac.com
FLSTFI Dave:
--- Quote from: Fullsac Performance on May 27, 2020, 08:40:04 AM ---Very accurate info Dave. I just tuned a mild 130" M8 and finished up at 149 HP. The Heavy Breather was showing a 7 HP loss vs open TB. :'(
Steve@fullsac.com
--- End quote ---
Thats a huge loss for the Stock M8 heavy breather.
JMK:
Dont know if you remember but when the dyno was done with the ventilator on the bike did it have the chrome cover installed? The cover seems to obstruct 30 percent or so of the filter surface. I am wondering if the loss in power gets better with the cover off. Thanks
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