Will EVOLS from IQ work on the PRO?

[Timbre]

I have Fox Evols off of a IQ chassis and want to use them on my new PRO....if possible. Here are the questions i have...

1) Will this work? I know they are about 5/16" shorter than the stock Pro shocks, and will lower the ride height a bit, but what will that affect?

2) If this will work, what other "adjustments" will be required...if any? Sucking up the limiter strap to "level" things back out to how they were with longer stock shocks?

Dealer says they wont work on the Pro.

If anyone has experience with this or a great theory/idea to make it work....i would appreciate your input.

Thanks!

 

[AndrettiDog]

The only difference is the bolts and bushings. Polaris went from standard to metric (or maybe it was the other way around) on the Pro. So the bushing and bolts will be too tight for the Pro. You just need to get the right size.

 

[mountainhorse]

The Pro RMK uses 10mm mounting bolts which are just a hair bigger than the 3/8" bolts on the IQ-RMK's...

IMO...If you have them...Try them out.. Go to the hardware store and buy 4 3/8" grade 8 bolts, 8 washers and 4 nylock nuts in the same length as the 10mm.

5/16" IS a fair bit on a suspension...but with the evols, you may be able to air up the main up a bit while still not having a harsh bottom of travel if the EVOL pressure is set correctly.. and get ride height close to your factory height, measured on flat ground...

IF you find that you like the shocks and want to ride them long term... Put the 10mm back in.... I suggest drilling the Fox Bushing inserts just the hair required to 10mm so that the stock bolts will fit... The factory 10mm bolt will fit in a 3/8 Fox Bushing... It wont.. Tried it already.
Those little fox Stainless Steel bushings are pricey little suckkers.

I could theorize all day if the 0.30" diff will in fully extended legth will make a difference...But diff in design and function may play a bigger role than I have experience with.

Bolt them up and run them to see if you like them.

This costs maybe $8 in bolts/nuts.

 

[KAWGRN]

I was wondering about the static sag as my pro sits on the floor at about 15 and 7/8 length as it sit on the floor so if a stock shock was like 18 and I used a shock like 17 and it sat at 16 where would I notice the problem valving being equal?On a side hill with the sway bar in it would still equalize the spring rates ,,and climbing the shorter shocks will hold the front end down easier,as I didnt have to change the limiter strap, I did this drag racing for years ,so mabe some track spin is the only real drawback?

 

[AndrettiDog]

5/16" IS a fair bit on a suspension...

Agreed, any difference is negative in the opposite direction. But...that same difference should exist on the IQ right? Unless you are measuring when the shocks are on with the weight of the machine compressing the shock. The IQ is heavier. Is the 5/16" measured on the sled (sitting) or off and compared to the difference of the Pro shocks off?

 

[Matt McFerran]

Hey Timbre-
I did the same thing this spring, put IQ Fox Evols on my Pro. The Evols were a little shorter, but noticeably lowered front height. I really liked the feel of the Evols on the Pro, but the lower ride height made it harder to initiate turns, especially on the downhill turns. I messed with the Evols on a few rides, then switched back to the stock Pro shocks.
The Pro felt better when I put the stock shocks back on. I am going to send the stockers in to revalve them, and leave the Evols on the Dragon.
I did not have the sway bar on the Pro.


Matt

 

[mountainhorse]

Matt, Thanks for that... can't beat hands on experience!

Here is my opinion for what it's worth.

KAWGRN: I was wondering about the static sag as my pro sits on the floor at about 15 and 7/8 length as it sit on the floor so if a stock shock was like 18 and I used a shock like 17 and it sat at 16 where would I notice the problem valving being equal?

You would notice it in more preload on the spring to get to the desired ride height (which greatly affects overall sled balance) and less sag which is also a component of a properly functioning suspension. If you crank more preload up you change the ride characteristics.

KAWGRN: ,and climbing the shorter shocks will hold the front end down easier,as I didnt have to change the limiter strap, I did this drag racing for years ,so mabe some track spin is the only real drawback?

Shorter shocks do not keep the front end down more... lift is dictated by the rear skid, HP and how much the sled is "hooking up" Starting slightly lower with a shorter shock does not change the lifting force... Also, less ski pressure will change the steering effort and how the sled pushes thru the turns. Less evident in deep snow.. but really there when you are in firmer conditions.

 

[KAWGRN]

Matt, Thanks for that... can't beat hands on experience!

Here is my opinion for what it's worth.



You would notice it in more preload on the spring to get to the desired ride height (which greatly affects overall sled balance) and less sag which is also a component of a properly functioning suspension. If you crank more preload up you change the ride characteristics.

Yes if you had to increse pre load but if they were both the same only one was shorter I think it would be the same

MH the ride height would be the same short shcok or long shock the diff would be in initial sag the compression would be the same on both shocksShorter shocks do not keep the front end down more... lift is dictated by the rear skid, HP and how much the sled is "hooking up" Starting slightly lower with a shorter shock does not change the lifting force... Also, less ski pressure will change the steering effort and how the sled pushes thru the turns. Less evident in deep snow.. but really there when you are in firmer conditions.

yes it does the free sag would help the reatr transfer faster befor it has to lift the whole front of the sled

 

[mountainhorse]

I'm sincerely open to learn.

Can you describe that in more detail?














.

 

[KAWGRN]

I shortened the shocks one inch on my turbo dragon when I went to SLP 3.0 pitch drivers and a timbersled rear and the attack angle on the track got way better ,,not as good as a drop and roll but better, I didnt think my dragon handeled worse or better than one with floats at the stock height but it shure got on top quicker, in the powder it felt like the center of gravity was lower in the sled,,, and it acted narrower??Yes I know this is SW and Not HCS but When I was drag racing a lot, I always tied the front of the sled down to help it not transfer as much.But these are just my experiences as an old man,,LOL

 

[Timbre]

Great information gentlemen!

I am leaning toward trying these EVOLS on the new '12 Pro just to get a feel for the difference as compared with the stock shocks. I also have access to a stock '11 Pro that i can compare side by side with. So that should give me a pretty good test to see if i want to leave them on or put the stockers back on and get them re-valved.