Did it do it before you replaced muffler? I’m assuming you put an aftermarket exhaust on?

 

Stock everything except new slip on exhaust. Ran perfect before

Ran perfect before. New after market exhaust, yes

 

Zane, we need more info to be of assistance. IE: stock motor? stock exhaust? Aftermarket exhaust? Etc.,...

 

Stock everything, except new muffler. Ran great before

 

May need to run a fuel controller or a tune with your particular exhaust then

 

If you took the cat exhaust off and put any other exhaust on you’ll need a tune! I recommend AA stage one kit,...great price, great instructional video and the result is remarkable.

 

Where, online would I find the kit?

 

Not to be too contrarion, but muffler replacement isn't likely to be it. Nor would that explain rough idle. Before you drop $500 on a tune try slipping the old muffler back on. If that's it I'll stand corrected, and you'll need to consider the $500 tune. I'm not too sure a non-turbo gets enough value for any of this, but...

Otherwise, any chance you banged into our hurt the o2 sensor? got too close to a spark plug wire and it's now arching? etc...

I'm a little late, but you might want to glance at this too:

AfterMarket Mufflers Don't Help HP?? Or? An Analysis

It seem to be generally accepted that for a stock Turbo and/or 1000xp, replacing the muffler has little to no value. In fact, very few of the replacement vendors make HP inprovement claims. Instead most report better sound and less heat. A few claim a HP or two. Meanswhile AA reports one...

www.rzrforums.net

Luck to you none the less.

-d

 

AA = Aftermarket Assassins
”DaFish” has a point and I assumed your O2 sensor is intact, my RS1 ran like crap right after my muffler modifications, AA tune solved all.

 

A more free flowing exhaust of course lets more air flow through then engine. ecu cant compensate enough fuel for the added air flow and that causes the engine to run lean. So there’s where a tune or fuel controller corrects the situation.

 

Crash:
If in fact the exhaust was a significant bottleneck first. Lots of guys been down this road and reported little happening via a simple slip on change, but then LJrat says his RS1 did the same things, so maybe something is unique with that. Still, rare would the time be that you'd be thinking "look at all that flow" at idle. Idle.

OP:
What does the slip on mfg say? Most will tell you if they require a tune. Evo's EVP does not. In fact I know of none that do.

Take a look at this thread:

Slip on exhaust with no tuning.

Getting ready to pull the trigger on one and wanted to hear from those with experience. Looking for actual experience on 2015 and later 1000's. Any issues? Thanks.

www.rzrforums.net

Now again, there may well be something special about the RSI, and I accept LJ's experience, but common experience is otherwise. This really is a "call the vendor and ask if they require a tune" time.

Good luck!

 

+1 on what has been said already. Put back on the OEM exhaust. Problem go away? If yes, then 'backpressure is a thing' and a tune is probably required (you might try pulling the battery lead first, and letting the ECU reset to factory, in case its done some learning over time that no longer applies). If no, then you might have banged the O2 sensor. Although, in the latter case, I would expect a code to be thrown.

 

Just bought a left over 2020, and I was going to gut the muffler. Then send it and the header to get ceramic coated. Guess not now.

 

Good call. So many upgrades that will make a bigger difference in your enjoyment. Like suspension, tires. lights, winch. On a turbo it's a "gut it asap", but on a NA motor there isn't much, arguably nothing. Somewhere along the line Joe made the comment that most tunes, on an N/A motor, really only feel faster because the change the throttle by wire sensitivity. They make little more actual power.

In any event, it's for sure a tough thing to think about dropping $1k into a slip on and tune on a NA machine when compared to the results the turbo guys get.

Then there is the whole "don't make it louder" conversation too.

Another little gotcha is vendor claiming "4 more hp". Which most will think "peak". But often isn't.

YMMV.

 

All I was considering was the drop in temps. I would put a programmer on it but I don’t want to effect the warranty. Heck we still have our 900xp and it has plenty of power so I’m sure the rs1 will be more than enough as it’s just a secondary machine.

 

Hey Folks, nice chat but I wonder if the original post - Zane, ever sorted his issue? Put his muffler back or what he ended up with?

 

Walker2: If you change your mind on moving forward with true-tuning of your car, message myself or “Lou” or “Sarge”. I’ve been tuning my 1-up for close to 3years.

To Dafish’s point; best money spent is in other areas!