Do you believe SLP's hp gains?

[sledheader]

Do you think the 9 hp gain with no fuel controller is believable? I feel like something else is going on on their test sled to see that from a pipe alone.

Also, I like the throaty sound of a GGB can vs the sound of the SLP. Can I order just the SLP pipe and get a GGB can to go with it?

 

[richracer1]

Do you think the 9 hp gain with no fuel controller is believable? YES

I feel like something else is going on on their test sled to see that from a pipe alone. I doubt it.

Also, I like the throaty sound of a GGB can vs the sound of the SLP.

Can I order just the SLP pipe and get a GGB can to go with it?
Yes you can order just the pipe, but using a different silencer can possibly require the use of fuel controller.

SLP spends an enormous amount of time developing and dialing in their pipe systems, on the dyno and in the real world.

 

[SRXSRULE]

Do you think the 9 hp gain with no fuel controller is believable?

Not for a second. There is no way that polaris would leave the stock fuel mapping that rich and still meet EPA requirements. I also feel if you could gain another 9hp with just changing the pipe, polaris would have done it already. A GOOD gain from an aftermarket single pipe would be 2-3 hp.
I would have to see the dyno results with the O2 readings before and after the pipe swap.
I have about 75 hours of hands on tuning with a chassis dyno and have never seen a 6% gain in HP where the fuel trim numbers were correct before and after. Eric

 

[mountainhorse]

Regardless... Changing the pipe will and should void the warranty...Regardless of what your "dealer" or mfg tells you.




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[sledheader]

Regardless... Changing the pipe will and should void the warranty...Regardless of what your "dealer" or mfg tells you.




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Would a can void the warranty?

 

[icr]

They use a resistor to add fuel on the top end, which is the only place they claim gains.

It amazes me how many people will say something is impossible without even reading the part suppliers web page explaining how it works.

 

[damx]

Go read dtr. They have a few new dyno updates on the axys. And the slp pipe. 4hp. Gain.

 

[richracer1]

FYI, an 09 700 RMK could run an SLP single pipe system and no fuel controller....and they claim +6 hp on that.

2011-2012 800CFI single pipe system +7.6HP w/controller
2013-2015 800CFI single pipe system +7.6HP w/controller
SLP 2015 Axys 800HO silencer only +2HP
SLP 2015 Axys 800HO single pipe system +9HP (7+2=9) w/egt resistor

Really not that hard to believe, but we are entitled to our own opinions.

 

[mountainhorse]

Would a can void the warranty?

If your sled came in with a blown engine and an aftermarket can... I say chances are good that you would get a denial on your warranty.




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[LPIdaho]

They use a resistor to add fuel on the top end, which is the only place they claim gains.

It amazes me how many people will say something is impossible without even reading the part suppliers web page explaining how it works.

That info is only provided in the product instructions, they don't just come out and say that's how they're achieving the improvement. They also don't provide dyno data of just adding the resistor to a stock pipe/can so it's impossible to say that their pipe/can does anything except shed some weight.

 

[richracer1]

That info is only provided in the product instructions, they don't just come out and say that's how they're achieving the improvement. They also don't provide dyno data of just adding the resistor to a stock pipe/can so it's impossible to say that their pipe/can does anything except shed some weight.

That is true

 

[mountainhorse]

SLP has a solid reputation... but adding almost 6% is a tall-order... plus... this is on the 2105 RUSH AXYS with the 800ho... nothing out for the 2016 Mountain sleds yet... Plus, "corrected" HP is not the real world on the mountain... with temp and altitude differentials.

Adding the EGT resistor is a way of "fooling" the ECU into thinking that the sled needs more fuel... so a "sort of" fuel mod is being done.

We'll see when an ACTUAL SLP pipe kit comes out in 2016 and hits the snow and independent dynos..

IMO... Polaris is not leaving much "on the table" in terms of reliable HP output on these sleds... the 13 lb weight drop IS, however, super impressive IMO.




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[icr]

That info is only provided in the product instructions, they don't just come out and say that's how they're achieving the improvement. They also don't provide dyno data of just adding the resistor to a stock pipe/can so it's impossible to say that their pipe/can does anything except shed some weight.

Putting your sled into ethanol mode adds the same amount of fuel. Try that and let me know if runs better wide open with the stock pipe.

 

[LPIdaho]

Putting your sled into ethanol mode adds the same amount of fuel. Try that and let me know if runs better wide open with the stock pipe.

Yes, but the resistor adds it to both the ethanol/non-ethanol map, depending on what you are running so that tells me nothing about adding 4% to the non-ethanol map

 

[Keith517]

They claim 8.5 hp gain on the Cats HO motor. This does require a fuel controller. But the hp gain is possible with a pipe. I have personally had a sled with SLP single as well as a stock sled and running them side by side I would not doubt they are getting every bit of that 8.5 hp.

 

[RMK-King]

Several axys rush owners on HCS with the SLP pipe/resister/clutching say it makes a night and day performance difference.

 

[Toad face killah]

From experience, I wouldn't put a pipe/can combo on my new sled without a fuel controller. I did it on my '10 800 Polaris and blew my motor within 5 miles. It was way too lean. SLP blamed polaris. Polaris blamed SLP. Either way, I wouldn't take that chance on a nice new expensive motor.

Adding just a can doesn't void warranty. as far as I've been told at least.

 

[Polaris RMK M.M.R.]

However if you blew your motor and put the stock can back on, how would they know?

 

[sledheader]

However if you blew your motor and put the stock can back on, how would they know?

I'm going to ask my dealer about it and expect him to say go for it. Like you said, if something drastic like a blown motor happened, I would throw the stock one back on. No way to tell.

 

[LPIdaho]

Would a can void the warranty?

I know for the PRO's there was an internal letter to the dealers, from Polaris, stating that any vehicle found with an aftermarket can would void the warranty.. unless it was an SLP can then the warranty was not affected