slip ons?
Road Master
Joined: Jul 2010
Posts: 1,042
Likes: 86
From: Centeral Coast, California
Based on what you've told me online and "offline", yes, I think 4" is exactly that, a compromise. It's a good one, if that's what you want. If so, it then comes down to who's 4" slipon you go with, and I am not EVEN going to open that can of worms! There's more than one good one to choose from, that's for sure.
Thread Starter
|
Road Warrior
Joined: Jun 2014
Posts: 1,297
Likes: 57
From: N. IL
Based on what you've told me online and "offline", yes, I think 4" is exactly that, a compromise. It's a good one, if that's what you want. If so, it then comes down to who's 4" slipon you go with, and I am not EVEN going to open that can of worms! There's more than one good one to choose from, that's for sure.
On the short list is supertrapp stouts. Which I see no one runs.....
Keep in mind I have a stock head pipe with converter removed. They say the stock head pipe is good up to 100h/p then it's time to start looking.
Quality look/chrome is Vidal. Sound is subjective.
Road Master
Joined: Jul 2010
Posts: 1,042
Likes: 86
From: Centeral Coast, California
Shoot, buddy!
On the short list is supertrapp stouts. Which I see no one runs.....
Keep in mind I have a stock head pipe with converter removed. They say the stock head pipe is good up to 100h/p then it's time to start looking.
Quality look/chrome is Vidal. Sound is subjective.
On the short list is supertrapp stouts. Which I see no one runs.....
Keep in mind I have a stock head pipe with converter removed. They say the stock head pipe is good up to 100h/p then it's time to start looking.
Quality look/chrome is Vidal. Sound is subjective.
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
2010 Limited with some stuff
Road Master
Joined: Jul 2010
Posts: 1,042
Likes: 86
From: Centeral Coast, California
I don't have any experience with Jackpot slipons, but I have to believe that they're quality. I haven't read anything stating otherwise.
Road Master
Joined: Jul 2010
Posts: 1,042
Likes: 86
From: Centeral Coast, California
jt, hopefully you'll continue to prefer mid to top end performance rather than low end torque; it'll save you money. I'm not interesting in betting on that premise, but if I were, I'd bet that down the road you'll start wishing you had more on the bottom end where you'll tap into that every time you ride. You probably won't tap into your top end performance level every time you ride unless you're building a one mile strip drag racing bike. You'll have what you need in that case.
Thread Starter
|
Road Warrior
Joined: Jun 2014
Posts: 1,297
Likes: 57
From: N. IL
Gipper......this whole setup is a bandaid done on a budget. Less than $2g into it. Might be close to 100. Probably more like low 90's as fas as h/p.
Tuner, cam, used slip ons, open a/c, hollowed cat....... Going to step into suspension and 23" wheel. Then either a turbo or stage 4????? I really like the Trask product. Don't know inherent problems in the heat. Need to research more.
Not interested in buying too much more. Until I figure out what to do. Shooting for being content. Not easy....
Tuner, cam, used slip ons, open a/c, hollowed cat....... Going to step into suspension and 23" wheel. Then either a turbo or stage 4????? I really like the Trask product. Don't know inherent problems in the heat. Need to research more.
Not interested in buying too much more. Until I figure out what to do. Shooting for being content. Not easy....
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
Road Master
Joined: Nov 2007
Posts: 774
Likes: 54
From: Brandenburg,Ky
Roger that, jt. Think of slipons much like you would cams....you can't have your cake and eat it too. The smaller the diameter, the more back pressure your engine gets, which equates to more torque. That said, you lose HP on the top end. The bigger you go, the less torque you have, but the more HP you gain on the top end, up to "that point of diminishing returns", wherever that may be based on your set up.
Based on our conversation earlier today, you're happy with your cams which are mid range to top end cams. If you want to maximize those cams, you'll choose slipons that are 4" to 4.5", most likely. You'll have a 103" that'll easily do 120 MPH, and still be making solid power when you roll on the throttle cruising at 85-90 MPH, and likely even higher. If you want to balance those cams out a tad, you might go with 3.5" slipons that are going to increase your torque range a touch, give you excellent mid range, and respectable top end (HP). But the top end with 3.5" won't be the same as it would be if you went with a larger diameter slipon. If on the other hand you wanted "off the line, hold on for a good time" bottom end torque, you're current cams would not be the right choice for that. You would want to choose a cam that makes power in the low RPM range, AND couple that with 3.5" slipons.
For whatever it's worth to you, I don't think that the 103" puts out enough power to really support a 4.5" slipon IF torque is the goal. I ran a set for three years until I dropped down to a 3.5" last weekend. The difference in torque is remarkable with the 3.5" slipons. BUT......before changing to 3.5" slipons, I could roll the throttle at 90-100 MPH, and the power that my motor was still making at that speed and RPM level was astonishing (118+ MPH was no problem, and I don't have a top end cam in my bike with the TW-222's). I just decided that that was not where I wanted my power band to be. Stuff can go very wrong very fast at those speeds, so I would rarely go there for that reason.
Comes down to what you want, but they can be viewed through the same lens (essentially) that you view cams through: you can have one or the other (or something right in the middle), but you can't have both or all three at the same time.
Based on our conversation earlier today, you're happy with your cams which are mid range to top end cams. If you want to maximize those cams, you'll choose slipons that are 4" to 4.5", most likely. You'll have a 103" that'll easily do 120 MPH, and still be making solid power when you roll on the throttle cruising at 85-90 MPH, and likely even higher. If you want to balance those cams out a tad, you might go with 3.5" slipons that are going to increase your torque range a touch, give you excellent mid range, and respectable top end (HP). But the top end with 3.5" won't be the same as it would be if you went with a larger diameter slipon. If on the other hand you wanted "off the line, hold on for a good time" bottom end torque, you're current cams would not be the right choice for that. You would want to choose a cam that makes power in the low RPM range, AND couple that with 3.5" slipons.
For whatever it's worth to you, I don't think that the 103" puts out enough power to really support a 4.5" slipon IF torque is the goal. I ran a set for three years until I dropped down to a 3.5" last weekend. The difference in torque is remarkable with the 3.5" slipons. BUT......before changing to 3.5" slipons, I could roll the throttle at 90-100 MPH, and the power that my motor was still making at that speed and RPM level was astonishing (118+ MPH was no problem, and I don't have a top end cam in my bike with the TW-222's). I just decided that that was not where I wanted my power band to be. Stuff can go very wrong very fast at those speeds, so I would rarely go there for that reason.
Comes down to what you want, but they can be viewed through the same lens (essentially) that you view cams through: you can have one or the other (or something right in the middle), but you can't have both or all three at the same time.
Its the Baffle that dictates the Performance.... As soon as jt sends me an email I can prove it!!
Road Master
Joined: Jul 2010
Posts: 1,042
Likes: 86
From: Centeral Coast, California
You're right in your statement, but there's more to the equation to consider than just a baffle. It also begs the rhetorical question: why buy a larger diameter slipon just to choke it down with baffles, unless of course the desire IS a tuneable slip on whereby the baffles can be removed and replaced as desired?
There's more than one way to skin the "torque cat", but we're just talking in general terms, and generally speaking guys choose a smaller diameter slipon with a smaller baffle than the baffle generally found in a 4.5" if increased torque is the goal.
You're not wrong, generally speaking; nothing to prove here. I would ask you this though....if you took baffles completely out of the equation AND the slipons, would you make the argument that there would be no performance difference between a 3.5" and a 4.5" "pipe"? Hmmmm.....
Last edited by gipper; Jul 24, 2015 at 12:41 PM.