What is the Difference
#11
05-24-2017, 11:11 AM
Grand HDF Member
#13
05-25-2017, 01:25 AM
Road Warrior
You can't pull what isn't there. Stock lean fuel delivery, stock restricted air cleaner. What are you going to scavenge from? His question was, how much gain from a stock de-catted headpipe to a power dual? Is it worth the $600.
I asked V&H tech the question:
Mark M. That exhaust will require a tuner for the bike to tun properly
Mark M. Also with the proper mapping you will get a increase in Horsepower/Torque
11:17
Tracy Methena Hi Mark. I know you need a tune and intake. This guy is trying to say there would be a 7-10 HP gain from stock minus cat, to power duals. I told them without more air and fuel, results would be negligable.
11:18
Tracy Methena If they have stock headpipe without the cat, and spend $600 for the power dual headpipe, will they see much of a gain? How much?
11:20
Mark M. Right that is true. To see those numbers you do need a tuner and high air flow intake. I would say about 5-6 Horse and 4-5 Torque. 9-10 gain would be are Pro pipe
Unless I see a dyno report from someone with the exact situation as the OP, I won't believe what you are saying. Taking off a de-catted headpipe and install power duals and run the dyno, no map, no intake, just the headpipes. This is what the OP's question was.
I asked V&H tech the question:
Mark M. That exhaust will require a tuner for the bike to tun properly
Mark M. Also with the proper mapping you will get a increase in Horsepower/Torque
11:17
Tracy Methena Hi Mark. I know you need a tune and intake. This guy is trying to say there would be a 7-10 HP gain from stock minus cat, to power duals. I told them without more air and fuel, results would be negligable.
11:18
Tracy Methena If they have stock headpipe without the cat, and spend $600 for the power dual headpipe, will they see much of a gain? How much?
11:20
Mark M. Right that is true. To see those numbers you do need a tuner and high air flow intake. I would say about 5-6 Horse and 4-5 Torque. 9-10 gain would be are Pro pipe
Unless I see a dyno report from someone with the exact situation as the OP, I won't believe what you are saying. Taking off a de-catted headpipe and install power duals and run the dyno, no map, no intake, just the headpipes. This is what the OP's question was.
The following users liked this post:
Magnut1 (05-25-2017)
#14
05-25-2017, 11:01 PM
I must add something that I thought was interesting. My friend has a 17 RG with the stock head pipe that has the cat removed. Called fuel Moto for a map for his set up and the map they sent him was the same map they use for there 2-1-2 headers. That pretty much tells me that the stock head pipe decatted flows the same as there $500 header. He auto tuned it once and the thing runs really really good and sounds top notch. With all this said what does an after market header get you other than a $500 lighter wallet.
#15
05-26-2017, 06:15 AM
Ultimate HDF Member
Source for those numbers please with before and after chart. No way you get that much of an increase in torque with a 2:1:2. I doubt you will see that with a 2:1. The numbers you have quoted would be along the lines of a cam change.
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