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07-12-2009, 05:14 PM
| | Member | | Join Date: Nov 2008 Location: Southern Il.
Posts: 11
| |  Re: Rush vs Cobra slip-on muffs?
Tennesse.... didnt notice much power difference. but i never did re-map.. now i have Vance-Hines shortshots with fuel-pac |
07-12-2009, 05:37 PM
|  | Senior Member | | Join Date: Dec 2007 Location: Missouri
Posts: 1,638
| | Re: Rush vs Cobra slip-on muffs?
Rush 1.5", 8,500 miles and the chrome looks like new. The sound is great to my ears. Power difference: I don't know how much is on account of the mufflers since I changed cams, air cleaner and installed a Power Commander as well.
__________________ '73 FX
'85 XLX
'02 FLHTCUI
Read
2 Chron 7:14
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This is my Granddaughter Sky, age 7. Can't walk, talk, or feed herself but look at that smile. Anyone care to complain about their lot in life? Not me!  |
07-13-2009, 12:13 PM
| | Senior Member | | Join Date: Nov 2007 Location: Kentucky
Posts: 145
| | Re: Rush vs Cobra slip-on muffs?
All,
Thanks for your responses; I elected to go with the Rush w/2" baffles. I installed a Stage I A/C and a Cobra Fi2000R O2 fuel management system. A remarkable improvement in performance but the main thing is the engine runs much, much cooler - especially the back cylinder. I didn't realize how much the factory A/F ratio and the stock muffs had the thing choked down; now that it can breathe properly, it sounds and runs like a scoot should (with an otherwise stock motor) with the usual shift point at 4,000 rpm. I'm still tweaking and fine tuning the fuel management (based on mpg and performance, popping on decel, etc.) without the use of the dealer's dyno or remapping - trying to save my nickels, ya know?
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Scruffy Pup
2007 FLHX
Stage I A/C
Cobra Fi2000R O2
Rush slip-on muffs
"Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end." |
07-17-2009, 10:03 AM
|  | Senior Member | | Join Date: Jun 2009 Location: Metro Detoilet
Posts: 634
| | Re: Rush vs Cobra slip-on muffs?
Quote:
Originally Posted by mstngjoe  Here's the before/after dyno run when I had the Rush 2.0 on the bike. No other changes were made. | Quote:
Originally Posted by heavyhlr Tennesse.... didnt notice much power difference. but i never did re-map.. now i have Vance-Hines shortshots with fuel-pac | Sounds like you both did a nice slip on muffler with no remap/aftermarket tuner. Both happy with the results?
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aka Gas Man
"Why pay someone else to f**k up your bike?" |
07-17-2009, 10:26 AM
| | Senior Member | | Join Date: Dec 2007 Location: Missouri
Posts: 1,638
| | Re: Rush vs Cobra slip-on muffs?
I'm glad you're happy with the results, Scruffy. Just wait till you put a better cam in there...it will really come alive. I noticed a very good reduction in heat as well, some from richer fuel mixture, some from longer duration / higher lift cams, and definitely some from free flowing exhaust.
__________________ '73 FX
'85 XLX
'02 FLHTCUI
Read
2 Chron 7:14
Please join me in this prayer daily.
This is my Granddaughter Sky, age 7. Can't walk, talk, or feed herself but look at that smile. Anyone care to complain about their lot in life? Not me! |
07-24-2009, 12:21 AM
|  | Member | | Join Date: May 2009 Location: Below Mason Dixon Line
Posts: 36
| | Re: Rush vs Cobra slip-on muffs?
Expand your choices. Take a look at the Rinehart's. Excellent quality and sound, with a deep throaty tone all it's own. Pricey yes, but remember, you get what you pay for. Listen to them on youtube.
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2009 FXDC
Rinehart Exhaust
Stage 1
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08-01-2009, 01:04 PM
| | Member | | Join Date: Aug 2009
Posts: 4
| | Re: Rush vs Cobra slip-on muffs?
Neither. I bought Samson Silver Bullet 29" slashers (slash down) slip-ons for my '06 Road King Classic. Wasn't satisfied with that. Put on a Cobra FI200R. Things got better and that stopped the popping on decel. Still wasn't satisfied. Bought Vance and Hines true duals to go with my Samson mufflers and a screamin' eagle air filter. Got more sound that's not obnoxious and more power. Now we're talkin! |
08-01-2009, 05:07 PM
|  | Member | | Join Date: Jun 2009 Location: Oregon
Posts: 28
| | Re: Rush vs Cobra slip-on muffs?
Quote:
Originally Posted by Gas Man Sounds like you both did a nice slip on muffler with no remap/aftermarket tuner. Both happy with the results? | Here are the numbers from the baseline dyno I had done today. No tuning or other mods. Khrome Werks HP+ slip-ons (blue line) vs. Rush 2.0 slip-ons (red line)
Same dyno & operator.
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2007 FXSTC, Cobalt Pearl/Pewter Pearl, Khrome Werks HP+ slip-ons, ISO grips & pegs. |
08-01-2009, 06:18 PM
| | Member | | Join Date: Aug 2009
Posts: 4
| | Re: Rush vs Cobra slip-on muffs?
I am happy with mine. It feels like it has more power and is more responsive. Since these engines are restricted to satisfy the EPA, when you make these kinds of changes you enable the bike to perform at its full, or at least improved, potential. I think one reason for an aftermarket fuel management system is that it is an alternative to a download from HD. |
09-07-2009, 12:47 PM
| | Senior Member | | Join Date: Aug 2008 Location: Northern Alberta Canada
Posts: 650
| | Re: Rush vs Cobra slip-on muffs?
Scruffy, are you happy with the fi2000, adjustability and performance, and would you buy it again?
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