Do you believe SLP's hp gains?

[Reg2view]

At what RPM is the SLP setup getting the hp bump?

I know they couldn't spec it for the 14/15 catalog, and have never seen it. I would guess at least +200 to 400 RPM. I've run SLP pipe/can combos before - they bump the max hp RPM to get the results, which is why they almost always need more fuel. And it works at WFO. They proved it with their pro setups.

FWIW, their pipes are designed for their cans - I've seen peeps try to run cans designed for the stock pipe with the SLP singles - but not for very long at WFO. The rule has been - you can run a SLP can on a stock pipe, but you shouldn't try to run a stock-pipe designed can on a SLP pipe - way too tight, regardless of fuel.

 

[mountainhorse]

...

 

[mountainhorse]

Strange... they don't post actual HP numbers though.


.

 

[JUDGED]

The SLP pipe with either stock can or the slp can makes about 9hp. Bumping the sled from about 154 to about 163.

The speed shop pipe mod bumps is about 8hp.

SLP ads a resistor that makes the ecu think it is running a different temp and fooling the ecu.

Not sure what speed shop is doing fuel wise.

 

[tincuprider]

Have you seen this ?https://m.youtube.com/watch?v=QhtitJgqf6Q

 

[Sheetmetalfab]

Have you seen this ?https://m.youtube.com/watch?v=QhtitJgqf6Q

I like slp products but i've seen gains like that from clutching alone.
I want to see a test like same sleds same secondary setup same primary spring, and with the pipe pulls x more grams of flyweight.

 

[pura vida]

I like slp products but i've seen gains like that from clutching alone.
I want to see a test like same sleds same secondary setup same primary spring, and with the pipe pulls x more grams of flyweight.

Exactly what I was going to say. If everything else is equal, does the pipe require more primary weight? If it does then IMO, it's a noticeable gain. I've ran a lot of SLP singles in the past. (All sleds mentioned are 155 RMKs) On my 09 Dragon (Mine actually ran pretty darn good overall, without any issues in the 1500 miles I owned it) the SLP single, no fuel changes required, did not seem to show much of an improvement. No clutch weight was added. Except it moved the "unsolvable" CFI-4 mid range stumble to a MUCH less annoying spot in the RPMs. On my 11 pro it absolutely made a noticeable difference. 2 gram increase on the clutch weights (66s to 68s). Have to say I was very unimpressed with SLPs supplied mapping for the PC-V. WAY too fat! It run much better with zero issues, with the stock mapping and just a slight octane bump. On my 13 pro I didn't notice a huge difference. Maybe a little more consistent with a slight bump in RPMs but not enough to jump 2 grams. Also put one on a buddies very good running 12 Pro Assault and could not bump up the clutch weights. Still runs super strong with just a little more RPM. could probably use 0.5-1.0 more grams in the clutch. Not sure if all this is very relevant but has been my experience. Not buying a new Axys next year so I'll have to find out from other sources if I think the SLP pipe is worth the money.

PV

 

[Stroker Customs]

Lol the ole more weight = more HP trick comes out.

 

[Vern]

I know this is the poo section so some will claim this is irrelevant, but if more clutch weight = more power then why did the 140hp m7 come with 68g weights and the 160+ hp m8 h.o. Come with the same 68g weights. More power don't always mean more weight.

 

[Sheetmetalfab]

I know this is the poo section so some will claim this is irrelevant, but if more clutch weight = more power then why did the 140hp m7 come with 68g weights and the 160+ hp m8 h.o. Come with the same 68g weights. More power don't always mean more weight.

So the m7 and the m8 ho had the same primary and secondary springs and helix?????
Also the same gearing and track?????

Its not really hard to grasp.

IF EVERYTHING IS THE SAME EXCEPT THE WEIGHTS THEN IT makes more power. (^^^^^read that again ^^^)
Including using the same sled!!!!!!!!

Trust the butt dyno!
Test on the hill.
Change parts at the bottom.

Comparing clutch weight to someone else's sled has no relevance whatsoever!!!! Too many variables.
But changes made incrementaly on one sled.......

 

[TheBreeze]

Unless you need to achieve higher rpm to get the gains. Clutch weights work in the realm of squared, so if you need to gain rpm to increase HP it is not unusual to run lighter weights.

 

[mtncat]

M7 geared taller than M8, M8 also has larger diameter secondary.

 

[Stroker Customs]

Just because you are running more clutch weight does not mean you are building power. That is what some people justify as a dyno. This makes me laugh cause same helix same spring ect ect is BS in mountain riding in my opinion. Let's put some numbers out here just for the ease of understanding. Remember this is mountain riding not lake racing

If I were to take a sled that made 160 HP stock and it was running 60 gram weights with 140/340 primary spring 140/240 secondary spring and a 60/40 helix. Ok this setup runs up a test hill at 40mph track speed and in let's say 3rd gear taching 8400 RPM. Now let's take the same sled and add a big bore and that is the only thing we change. Same clutching same gearing and we go to the same test hill now we are doing 60mph track speed and now we were able to pull the hill in 4th or 5th gear while still taching 8400 RPM. But you say oh that big bore didn't build any more HP because we didn't add and weight to the primary. everyone has theories and there seem to be a million of them on clutching.

 

[Vern]

So the m7 and the m8 ho had the same primary and secondary springs and helix?????
Also the same gearing and track?????.......

For the most part yes

 

[TheBreeze]

And they run similar weights. Know why? The M7 makes power at 7800-7900 rpm, and the HO runs 8100-8200.
Squared forces add up quickly, and you almost always need to lower weights when spinning a motor faster to make power.

 

[RMK935VA]

I have already placed an order for a Diamond S Quiet Muffler for the Axys. 18 lbs. weight savings and not too noisy. I heard one running on a Ski Doo T3 and I could not tell the difference between it and the stock muffler. As far as the warranty goes, I don't believe that the ECU can tell the difference between the stock muffler and an aftermarket one. They can be swapped out in minutes. I will keep my stock muffler in case I ever have a problem with the motor in the Axys but I don't think that I will. 18 lbs. is a lot of weight to remove from an already very light sled. It will put the dry weight of the 163 by 2.6" under 400 lbs. That is what I am after. You will also have the corresponding greater horsepower to weight ratio. For me, the $575 for the muffler is a great deal all the way around. It is $31.95 per pound. You can't find a much cheaper way to reduce weight than that.

 

[sledheader]

I have already placed an order for a Diamond S Quiet Muffler for the Axys. 18 lbs. weight savings and not too noisy. I heard one running on a Ski Doo T3 and I could not tell the difference between it and the stock muffler. As far as the warranty goes, I don't believe that the ECU can tell the difference between the stock muffler and an aftermarket one. They can be swapped out in minutes. I will keep my stock muffler in case I ever have a problem with the motor in the Axys but I don't think that I will. 18 lbs. is a lot of weight to remove from an already very light sled. It will put the dry weight of the 163 by 2.6" under 400 lbs. That is what I am after. You will also have the corresponding greater horsepower to weight ratio. For me, the $575 for the muffler is a great deal all the way around. It is $31.95 per pound. You can't find a much cheaper way to reduce weight than that.

I think I will go with the GGB can for 255 and just sacrifice the 2 more lbs it weighs than the diamond S lol

 

[Sheetmetalfab]

fair enough, sounds logical.

If i hit good rpm and then overev after adding a mod usually i add wieght to the arms to use the power available.

Knee jerk reaction i guess.

 

[Kraven]

At what RPM is the SLP setup getting the hp bump?

I know they couldn't spec it for the 14/15 catalog, and have never seen it. I would guess at least +200 to 400 RPM. I've run SLP pipe/can combos before - they bump the max hp RPM to get the results, which is why they almost always need more fuel. And it works at WFO. They proved it with their pro setups.

FWIW, their pipes are designed for their cans - I've seen peeps try to run cans designed for the stock pipe with the SLP singles - but not for very long at WFO. The rule has been - you can run a SLP can on a stock pipe, but you shouldn't try to run a stock-pipe designed can on a SLP pipe - way too tight, regardless of fuel.

On the bold, call SLP, they'll confirm that you CAN run the STOCK can on the AXYS 800 HO in conjunction with their SLP pipe

 

[diamonddave]

On the bold, call SLP, they'll confirm that you CAN run the STOCK can on the AXYS 800 HO in conjunction with their SLP pipe

I don't think Reg2View was talking about running the stock can with an SLP pipe. I believe he is referring to running other aftermarket silencer's with the SLP pipe.

but you shouldn't try to run a stock-pipe designed can on a SLP pipe - way too tight, regardless of fuel.