Fullsac headers with FP3
Thread Starter
|
Intermediate
Joined: Feb 2017
Posts: 32
Likes: 4
From: Salem, Mass.
Fullsac headers with FP3
Hey guys, does anyone know if a Fullsac Sport headpipe will give you less exhaust reversion and less crosstalk between the O2 sensors than a decated factory headpipe? I'm having trouble autotuning my '15 Street Glide, no matter what maps I try on the FP3 fuelpack. I'm running the Fullsac headers, Cobra 3"Racepro slipons and Arlen Ness stage 1 air filter. Bike runs good once it's going, sounds and feels like s**t when it's in traffic or just idling. Running temp is around 260-270 when riding but, jumps to about 300+ in slow traffic and red lights. I've made the fuel/air mixture a little richer, 13.9 to 1 across most of the table on several of the maps I've tried from V&H. Whether or not I autotune seems to make no difference on the idle or the temperature. Are my expectations just set too high for this type of engine and bike? I thought a well designed aftermarket headpipe and a fuel tuner would reduce my temps and make my bike run smoother. I think it ran better when it was stock.
Road Warrior
Joined: Mar 2010
Posts: 1,505
Likes: 56
From: Vancouver Island, British Columbia
If it was me, I'd give Steve a quick phone call.
I'm guessing he'd say to try a different muffler, probably be best to go with one of his offerings like a CVO body, ( would look a lot better on a touring bike than a 3" muffler imho), and his 1.75" or max 2" cores and then give V&H a call back and they would recommend a good starting map to begin the auto tune process with.
I'm guessing he'd say to try a different muffler, probably be best to go with one of his offerings like a CVO body, ( would look a lot better on a touring bike than a 3" muffler imho), and his 1.75" or max 2" cores and then give V&H a call back and they would recommend a good starting map to begin the auto tune process with.
Ultimate HDF Member
Joined: Jan 2009
Posts: 5,016
Likes: 277
From: East Tn Foot of The Dragon
Hey guys, does anyone know if a Fullsac Sport headpipe will give you less exhaust reversion and less crosstalk between the O2 sensors than a decated factory headpipe? I'm having trouble autotuning my '15 Street Glide, no matter what maps I try on the FP3 fuelpack. I'm running the Fullsac headers, Cobra 3"Racepro slipons and Arlen Ness stage 1 air filter. Bike runs good once it's going, sounds and feels like s**t when it's in traffic or just idling. Running temp is around 260-270 when riding but, jumps to about 300+ in slow traffic and red lights. I've made the fuel/air mixture a little richer, 13.9 to 1 across most of the table on several of the maps I've tried from V&H. Whether or not I autotune seems to make no difference on the idle or the temperature. Are my expectations just set too high for this type of engine and bike? I thought a well designed aftermarket headpipe and a fuel tuner would reduce my temps and make my bike run smoother. I think it ran better when it was stock.
I run (2011 RK) an Fp3 canned map with decatted head pipe, Naked V02 stage 1 a/f and RCX 4" cans. It tunes fine in auto tune and with the canned map. Something is wrong, mufflers(lack of back presure) vacumn leak, down load incomplete. Many tuning TC's with Fullsac sport pipes with good results. A 2" baffle will work the best
Last edited by checkers; Mar 16, 2017 at 08:59 PM.
Thread Starter
|
Intermediate
Joined: Feb 2017
Posts: 32
Likes: 4
From: Salem, Mass.
Hi tpcowfish, Yeah, I've had this set up for over a year and have become quite familiar with how the autotune feature works. I usually autotune for a few hundred miles on a few different rides and I flash the map when I have populated a decent amount of cells(green). I ride around for a while and see if there's an improvement over the previous map. If not, I delete the map and start autotuning another V&H canned map. Trouble is, I haven't found that perfect map yet. I just don't like the way the bike idles and how high the head temps go when riding slow and in stop and go traffic. Like I said, maybe my expectations are too high.
To answer checkers question: 3" is the diameter of the pipe, they have 2" constant velocity cores, should be enough for back pressure, I'd imagine.
To answer checkers question: 3" is the diameter of the pipe, they have 2" constant velocity cores, should be enough for back pressure, I'd imagine.
Ultimate HDF Member
Joined: Jan 2009
Posts: 5,016
Likes: 277
From: East Tn Foot of The Dragon
Hi tpcowfish, Yeah, I've had this set up for over a year and have become quite familiar with how the autotune feature works. I usually autotune for a few hundred miles on a few different rides and I flash the map when I have populated a decent amount of cells(green). I ride around for a while and see if there's an improvement over the previous map. If not, I delete the map and start autotuning another V&H canned map. Trouble is, I haven't found that perfect map yet. I just don't like the way the bike idles and how high the head temps go when riding slow and in stop and go traffic. Like I said, maybe my expectations are too high.
To answer checkers question: 3" is the diameter of the pipe, they have 2" constant velocity cores, should be enough for back pressure, I'd imagine.
To answer checkers question: 3" is the diameter of the pipe, they have 2" constant velocity cores, should be enough for back pressure, I'd imagine.
Trending Topics
Stellar HDF Member
Joined: Oct 2007
Posts: 2,946
Likes: 234
From: Kentucky
I have a sportpipe with big louies and 2.5 baffles and also a big sicker. V&H told me to load the power duals with twin slash slip-on. It runs fine but has a little decel pop which is to be expected
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Grand HDF Member
Joined: Jul 2007
Posts: 3,736
Likes: 8,515
From: Bates County MO
Its an air cooled motor. Stop and go traffic has little to no air movement. No surprise the temps go up when sitting still with the bike running. The idle concern sounds like EITMS is kicking on- you can turn that off with your right hand.
Road Warrior
Joined: Sep 2013
Posts: 1,926
Likes: 193
From: ohio
Well, Maybe try calling them with your phone, and app loaded by your bike, with good wi fi service, They can read your app right over the phone with you, and see it, About all i can suggest, if all else has failed, good luck,