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Author Topic: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB  (Read 3033 times)

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deldago

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #15 on: April 14, 2020, 07:48:17 PM »

May be a little off topic but I have been told that the heavy breather hurts power at speed because the air flowing over it at say 60 mph creates a vacuum effect hurting the ability to suck in air? Would be hard to prove on a stationary dyno but any truth to that?
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rayson56

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #16 on: April 14, 2020, 08:23:59 PM »

Not to jack your thread Steve but here is what looks like a possible solution for us M8 guys and you can supposedly use your HD Ventilator outer cover as well.

https://www.ebay.com/itm/K-N-RK-3956-Metal-High-Flow-Air-Intake-System-Black-for-Road-King-Street-Glide/401569819451

Thoughts?
« Last Edit: May 27, 2020, 12:09:36 AM by rayson56 »
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Dpaquet135

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #17 on: May 26, 2020, 01:25:17 PM »

I have a similar build. what exactly is the best best AC/Ventilator for the 117 Twin Cooled?
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RJW

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #18 on: May 26, 2020, 04:15:11 PM »

I have a similar build. what exactly is the best best AC/Ventilator for the 117 Twin Cooled?



X2
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FLSTFI Dave

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #19 on: May 27, 2020, 06:50:11 AM »

Excellent information, thanks Steve
By the way for the M8 guys the Screaming Eagle Heavy Breather Extreme seems to be the go to there, especially important on those big motors.
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.
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Fullsac Performance

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #20 on: May 27, 2020, 08:40:04 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.

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
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FLSTFI Dave

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #21 on: May 28, 2020, 07:29:11 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

Thats a huge loss for the Stock M8 heavy breather. 
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JMK

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Re: 117 TC Dyno Test. Stock CVO Ventilator VS Open TB
« Reply #22 on: June 12, 2020, 10:10:09 AM »

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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