slip ons vs true duals
Thread Starter
|
Intermediate
Joined: Jun 2009
Posts: 41
Likes: 0
From: east texas
slip ons vs true duals
anyone know if there is significant hp gain by installing true duals over a set of slip ons only ? I planned on purchasing a set of Reinhart slips ons and am planning on installing a stage II kit later on - would the true duals make much of a difference - sorry if i am sking something that has been discussed but i looked and couldnt find anything on this - i am riding an 09 street glide
thanks
steve
thanks
steve
2nd Gear
Joined: Jun 2009
Posts: 6
Likes: 0
From: Illinois
Here is what I was told. And please if anyone knows for sure, please correct me.
I also ride an 09 SG. The dealer told me that technically what is on there are true duals.
He said that when the pipes go together ( you know the whole 2 to 1 to 2 design that is new on the 09's) that the 2 pipes are together, but not into 1 pipe. Each pipe is its own pipe, they are just designed together where they go from 2 to 1.
Does this make sense? Not sure if I am explaining it very well.
If anyone know for sure, please let me know. I have always wondered if what they told me was true or not. The service guy that told me this didn't sound to convincing.
keep the rubber on the pavement,
orfy
I also ride an 09 SG. The dealer told me that technically what is on there are true duals.
He said that when the pipes go together ( you know the whole 2 to 1 to 2 design that is new on the 09's) that the 2 pipes are together, but not into 1 pipe. Each pipe is its own pipe, they are just designed together where they go from 2 to 1.
Does this make sense? Not sure if I am explaining it very well.
If anyone know for sure, please let me know. I have always wondered if what they told me was true or not. The service guy that told me this didn't sound to convincing.
keep the rubber on the pavement,
orfy
Road Warrior
Joined: Dec 2008
Posts: 1,639
Likes: 2
From: Australia
Does anyone know if that is true? I would have thought that scavenging will improve flow thru the whole rev range?
Road Master
Joined: Apr 2009
Posts: 973
Likes: 1
I recently asked the same question and a search of the forum turned up some conflicting information, mostly be people who like to speculate rather than actually know, if that makes sense.
I talked to a very reputable and well thought of forum vendor that has an excellent reputation. They recently dyno'd a 2009 SG stock headpipe as well as both dresser duals and V&H power duals on the same bike, same day, same dyno and same dyno operator.
No power gains from the aftermarket head pipes. They could have easily lied to gain a sale as I was ready to spend but instead they gained a customer for life. I LOVE dealing with vendors like that and will continue to do so for a long time, and I like spending money.
I had heard that the 09 headpipes were pretty good, and this confirmed it for me so I just ordered slipons and called it good.
I talked to a very reputable and well thought of forum vendor that has an excellent reputation. They recently dyno'd a 2009 SG stock headpipe as well as both dresser duals and V&H power duals on the same bike, same day, same dyno and same dyno operator.
No power gains from the aftermarket head pipes. They could have easily lied to gain a sale as I was ready to spend but instead they gained a customer for life. I LOVE dealing with vendors like that and will continue to do so for a long time, and I like spending money.
I had heard that the 09 headpipes were pretty good, and this confirmed it for me so I just ordered slipons and called it good.
Thread Starter
|
Intermediate
Joined: Jun 2009
Posts: 41
Likes: 0
From: east texas
Trending Topics
Road Master
Joined: Apr 2009
Posts: 973
Likes: 1
I prefer facts. My 2 cents.
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
Tourer
Joined: May 2006
Posts: 266
Likes: 14
From: NEW YORK
Khrome werks 3.5
I recently installed the new khrome werks 3.5 touring mufflers. I have not dynoed it yet but there is definitely better throttle response especially off the line. They are very deep sounding but also very quiet. A little louder after a couple hundred miles. I considered true duals but don't want to loose bottom end.
Tourer
Joined: Apr 2009
Posts: 282
Likes: 1
From: Las Vegas area
The 09 headpipes are already a 2-1-2, so V&H power duals wouldn't be expected to do anything.
If the folks at Fullsac can be believed - based on their dyno testing, even the stock headpipes on CA bikes (with catalytic converter) do not restrict flow enough to alter performance on a stock TC bike.
The test described above apparently did not include a 2-1 system.
If the folks at Fullsac can be believed - based on their dyno testing, even the stock headpipes on CA bikes (with catalytic converter) do not restrict flow enough to alter performance on a stock TC bike.
The test described above apparently did not include a 2-1 system.