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Intake and Exhaust Intake and Exhaust Systems for Road Glides

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post #1 of 3 (permalink) Old 05-11-2019, 10:11 PM Thread Starter
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Join Date: Aug 2010
Location: Gold Coast of California
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Back Pressure

Hey gang,
So, I've pumped out my 107 to the SE 114 kit. Not sure what I'm getting for ponies. I'm running Supertrapp Fatshots. Was running 25 discs each side with open end cap. Asked Jamie about SE Heads and he said he would not recommend head work, that the M8's are really back pressure sensitive and he recommended dropping to 12 discs each side and put the closed end cap on. Seat of the pants indicates a mild increase in power, but much better MPG (+10% over 200 miles so far).

Just wanted to share this info.
BG
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bikepsych, 2017 RoadGlide Ultra
Supertrapp Fatshots, SE A/C, 107 2 114 kit
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post #2 of 3 (permalink) Old 05-15-2019, 11:00 AM
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I did the SE Stg 4 also finally scrapped the stock pipe went with rhinehart Slimline with slip on and PCV dynode out at 130/130 idk about the back pressure though air in, air out seems logical to me
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post #3 of 3 (permalink) Old 06-20-2019, 11:15 PM Thread Starter
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Update...Update...Update

Took the RG out to Mount Rushmore and Sturgis a few weeks back. Trailered it behind my Ram2500 and Lance Camper up to Fort Collins, CO then rode to Spearfish for the campsite. Gassed up in Cheyenne at mile 7 and made it all the way to Deadwood, SD on one tank. Googlemaps puts it at 295 miles. Took 5.15 gallons in Deadwood and I was showing 8 miles of range left. For an MPG of 57.28. I would not have believed it had I not done it.

Because the wife was driving the TC, I kept it to 65-67 MPH on I25, then about the same on the backroads.

Of course the next few days the MPG's were not quite so generous heading down to Rushmore and Custer. Still did fairly well at about 48. Usually here in SoCal I'm getting around 38.

So, good fuel mileage is possible. :-D

BG

bikepsych, 2017 RoadGlide Ultra
Supertrapp Fatshots, SE A/C, 107 2 114 kit
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