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  #1  
Old 8th February 2016
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Default Rush Slip-Ons Pipe Test



This is a set of Rush 3" slash-down slip-ons with the 1-3/4" baffles. It's the 07-13 style with the crossover fittings on the mufflers themselves.

Comments:

These were very easy to install. They mapped right in, too, I had no trouble.

Diffuses pretty good, take a look at the shape of the torque curve. A little weak down low and a little weak up top but overall it's a very wide torque curve with no bad push-backs anywhere.

Comparison to the reference pipe:



Usually I like to do a separate chart for power and torque, so the chart isn't so busy, but when the results aren't all that different I do both on one sheet like this.

It's really only above about 5600 that the Patriot dominates. Below that, it's pretty much the Rush slip-ons that do better.

Pretty impressive overall for a set of slip-ons. These things outperform a lot of 2 into 1's I've tested.

I'm going to ask the owner if I can hang onto these for another week. I'd like to test them against the Cycle Shacks, just for grins.
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Old 8th February 2016
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Here's a bonus chart. I tested the Rush slip-ons the same day and with the same motor configuration as the Cobra PowerPro HP two into one. Here's how the two of them compared:



Despite the .5hp advantage on top, which is well within the repeatability of the measurement, overall the Rush slip-ons outperformed the Cobra 2:1. Which is pretty remarkable.

I'm impressed by these slip-ons. They perform much better than I expected.
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Old 8th February 2016
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Are the Rush slip-ons a straight thru design? Have you tested the S+S slip-ons ? I have the S+S slip-ons which are a straight thru design. They seem to work very well also. Roger
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Old 8th February 2016
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I have some of the older SE slipons (bought in 1995, I believe). Have you ever tested those?

Very impressive performance for sure on those Rush slipons. Thanks for posting this up so we can all benefit from your "due diligence" on performance parts.

We all appreciate it, I'm sure.

John
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Old 8th February 2016
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Quote:
Originally Posted by rwharris View Post
Are the Rush slip-ons a straight thru design? Have you tested the S+S slip-ons ? I have the S+S slip-ons which are a straight thru design. They seem to work very well also. Roger
Yes, you can see right through them.

Haven't tested the S&S, but if you want to send me a set, I'd be happy to.

Quote:
Originally Posted by John Harper View Post
I have some of the older SE slipons (bought in 1995, I believe). Have you ever tested those?
Uhmm, well, I've dyno'ed bikes with them on, for example:



This was an old set of SE's with the baffles removed. Baffles installed, we could only muster 97 or so if memory serves. He's got our 100+hp 883-1250 conversion kit. Removing the baffles caused a bit of a reversion around 3800 as you can see.

But I've never actually compared a set to the Patriot. All I've ever compared to the Patriot can be found in our library of XL exhaust system dyno test results, as well as here on the forum. Since I'd have to somehow hang a pre-04 header to the bike to test them properly, I haven't messed with it on the mule.

Quote:
Very impressive performance for sure on those Rush slipons. Thanks for posting this up so we can all benefit from your "due diligence" on performance parts.

We all appreciate it, I'm sure.
Happy to share. Believe me, being in the performance business, we have a vested interest in what pipe a guy runs with our motor parts. So we need the data. Every pipe company claims their pipe performs great. Many don't. So we have to sort it out.

For the most part, I try to keep my opinions to myself, just present the data and let people make up their own minds. But it's hard not to let my opinion out. On these Rush slip-ons, I have to say, they impressed me. Very good result for a set of slip-ons.
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Old 9th February 2016
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Default

Crazy nice curve and not terrible up top. I hate to give up torque where I cruise so these would be a decent option.

Looks decent too.
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Old 22nd February 2016
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Bonus comparison:



I gotta say, these Rush slip-ons are impressive. They work good. And people who know me, know I don't impress easily.
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Old 15th March 2016
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I see 1.75 baffles. They exists also in a 2" version. Curious to see the differences.

A question: Are these slip ons installed on STOCK tubes (with compensator)?
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Old 24th August 2016
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Default

I read all your dyno tests on various mufflers.

The Rush and SE-II torque curves are what I want.
I have a 2008 1200R, stock "W" cams and engine.
It will have a Hammer Impact offset airbox when done.

I have SE-II pipes installed, but flashlight reveals the previous owner discarded the baffles. I was wondering why it was louder than all my other stockers...

Q: have you done any dyno work on SE-IIs compared to Rush, as both appear to be "straight through?" The stock SE-II tested very well in the MotoUSA shootout, again with a flat curve for low-end grunt.

My first thoughts are buying a set of Big City Thunder baffles for the SE-II.
I'm not into roadside counseling with the cops, so excessive noise is not an option.
The BCT baffles sound good on paper, and they have a good reputation over many years.
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