Giving up on waiting
#21
02-11-2018, 12:11 PM
Road Warrior
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Kyle Moore (02-11-2018)
#22
02-11-2018, 12:15 PM
Grand HDF Member
You don't have to leave it stock -- you can go with a Harley Stage II cam, or a Stage III big(ger) bore kit, or a Stage IV, and still maintain your warranty.
The Stage II gives you an extra 20 to 34% more horsepower, so it's not like it's nothing.
If you go PowerVision, your warranty is gone, period, even if you used all Harley parts otherwise.
The Stage II gives you an extra 20 to 34% more horsepower, so it's not like it's nothing.
If you go PowerVision, your warranty is gone, period, even if you used all Harley parts otherwise.
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Kyle Moore (02-11-2018)
#23
02-11-2018, 01:27 PM
You don't have to leave it stock -- you can go with a Harley Stage II cam, or a Stage III big(ger) bore kit, or a Stage IV, and still maintain your warranty.
The Stage II gives you an extra 20 to 34% more horsepower, so it's not like it's nothing.
If you go PowerVision, your warranty is gone, period, even if you used all Harley parts otherwise.
The Stage II gives you an extra 20 to 34% more horsepower, so it's not like it's nothing.
If you go PowerVision, your warranty is gone, period, even if you used all Harley parts otherwise.
Ive thought about that too. I think the bike has plenty of power, I'm just a maniac. Ive considered stage 2 and 3, I worry about the issues I've heard about 'em. and when I can put a real cam in it later itll just be icing on the cake, I just don't like buying stuff twice. Stage 2 I might be interested in because Ill retain my warranty and get a nice power bump. Then HD's plan is working though, they got me to buy emissions legal power parts and I don't believe in that haha. My dad and I have a GT500 that makes 1004whp on C16, I'm used to doing cool **** like that not putting emissions legal cams in my stuff haha.
#25
02-11-2018, 01:38 PM
depends on the entire setup, a stock engine with a stock cam I think some of the headpipes can reduce low end torque. or at least the low end feel. I have read the VH powerduals don't work very well on an M8 for example, the M8 sounds like it likes a 2 into 1 exhaust. Even FMs head pipe kinda looks like its designed to work as a 2 into 1. I think some of the headpipes that hit the market early like the power duals were just sort of adapted to fit the new bike, I bet not much R&D was actually done to optimize it. FM waited quite awhile to release there's, knowing how those guys do things, and looking at how different it is than the TC pipe tells me I might not be wrong on that. Even the "tormentor" headers that look like true duals have a cross over in them.
#26
02-11-2018, 01:46 PM
Stellar HDF Member
https://www.hdforums.com/forum/sport...l#post17075742
Relevant part:
One of the strongest myths regarding Harley's is: They need back-pressure to run well.
This back-pressure myth is too strong for me to spend time fighting it.
Please do not take offense, nor think I am backing down from my statement if I do not respond, taking the time to engage in conversation on the subject.
I'll simply state:
Back-pressure fights AGAINST performance. Back-pressure holds back power, not unlike a 300 lb. rider will reduce acceleration more than a 150 lb. rider.
The reason some folks think that back pressure is good, is because when they put a baffle in (which creates back-pressure) the bike runs stronger. BUT, it is NOT running stronger because of the back-pressure, it is running stronger in spite of the back-pressure, because it is reducing Reversion.
It is wrongly assumed that the back-pressure that baffles create increases power. It is the reduction in reversion from baffles that increase power.
The baffle is reducing power because of the back-pressure, but it is increasing power by Reversion reduction. In most cases the power gained by reduction of reversion is More than the power lost to back pressure, so there is a net gain of more power.
But it is IN SPITE of back pressure, not because of it.
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CageyKG (02-11-2018)
#27
02-11-2018, 01:55 PM
Stellar HDF Member
As to the OP's original topic...
I don't have to worry about it. Why? Because I won't even consider a M8 until I see some satisfactory change in status when it comes to the sumping issue and perhaps the transfer problem (if I were to consider a touring model). That may mean that I have to wait a few years before they get this worked out. But so be it, I'm in no hurry. If I had already bought a M8, I would definitely be interested in maintaining the warranty.
Now, if it was a new Sporty that I had just purchased, then I'd probably not worry about it too much and would likely do what I wanted.
I don't have to worry about it. Why? Because I won't even consider a M8 until I see some satisfactory change in status when it comes to the sumping issue and perhaps the transfer problem (if I were to consider a touring model). That may mean that I have to wait a few years before they get this worked out. But so be it, I'm in no hurry. If I had already bought a M8, I would definitely be interested in maintaining the warranty.
Now, if it was a new Sporty that I had just purchased, then I'd probably not worry about it too much and would likely do what I wanted.
Last edited by T^2; 02-11-2018 at 02:07 PM.
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Kyle Moore (02-11-2018)
#28
02-11-2018, 02:08 PM
Outstanding HDF Member
In the sixties and seventies we welded A bolt with a washer in the header to make back pressure. Then they made these fancy mufflers to make the epa happy,so yes you will lose bottom end.
#29
02-11-2018, 02:15 PM
Stellar HDF Member
As to the bolt/washer... or thumbscrew... or lollipops... or TTI's sold by DK... Their primary function is to dampen the reflected waves - or IOW's reduce reversion.
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CageyKG (02-11-2018)
#30
02-11-2018, 02:43 PM
depends on the entire setup, a stock engine with a stock cam I think some of the headpipes can reduce low end torque. or at least the low end feel. I have read the VH powerduals don't work very well on an M8 for example, the M8 sounds like it likes a 2 into 1 exhaust. Even FMs head pipe kinda looks like its designed to work as a 2 into 1. I think some of the headpipes that hit the market early like the power duals were just sort of adapted to fit the new bike, I bet not much R&D was actually done to optimize it. FM waited quite awhile to release there's, knowing how those guys do things, and looking at how different it is than the TC pipe tells me I might not be wrong on that. Even the "tormentor" headers that look like true duals have a cross over in them.