Attac Systems

[fargineyesore]

Anyone know much about these. I bought a sled with one on and it seems to burn an awful lot of fuel. Driving it around Edmonton area. From what I was told they are supposed to compensate for altitude without jetting. Do they actually work the way they are supposed to?

 

[carguy]

What sled? What year? Year of Attac?

You'll get every type of answer on the forum for each side, good & bad.

Imo, I've had one for 5 years, installed it myself and after getting my baseline jetting done the sled has operated flawlessly. My brother has had an Attac on his machine since 2002 I think. He talked with Holtzman who said he should remove his and send it back for recalibration (or a new one) I think just due to age. I do not believe mileage has suffered or decreased with the Attac installed. The biggest problem I've had in past was engine flodding when the sled ended upside down and running till it quit...the fix is either one way valves you can buy from Holtzman, which I have but never installed. Or just make sure you stop the engine asap after a rollover.

His sled, a 2001 Polaris RMK600/700ves (Polaris 700ves kit installed)
My sled, a 2004 Polaris RMK 800

 

[Grinny]

I got one installed on my sled at APP in St. Albert and it's ran flawlessly since...both on flat land and in the hills. I do have the same problem with flooding if I put it on it's side or roll it over...no big deal though.

 

[E-Zmoke]

Anyone know much about these. I bought a sled with one on and it seems to burn an awful lot of fuel. Driving it around Edmonton area. From what I was told they are supposed to compensate for altitude without jetting. Do they actually work the way they are supposed to?

Mine just came in for my 02' Edge, Was going to install it this weekend. From what I've been told its as close to EFI as your going to get. If its diled in correctly sled should run like a dream. I ordered the drain so hopefully I won't have the same flooding issue as the other guys are reporting. As for your fuel consumption...you can start by having a look at your plugs and see what colour you are. What kind of sled is this??

 

[fargineyesore]

Thanks guys. Sled is 08 Polaris IQ Shift. Seems to run good, but since there's no room for a gas rack (Polaris doesn't even make one for these) I'm a bit concerned when doing a long trail run because it seems to go through a lot of gas. From the comments above though, seems the systems are a good thing. Plugs are new, so I'll do another plug burn and have a look. First time plugs looked okay.

 

[BIGHORN1]

Thanks guys. Sled is 08 Polaris IQ Shift. Seems to run good, but since there's no room for a gas rack (Polaris doesn't even make one for these) I'm a bit concerned when doing a long trail run because it seems to go through a lot of gas. From the comments above though, seems the systems are a good thing. Plugs are new, so I'll do another plug burn and have a look. First time plugs looked okay.

08 iq? wouldnt this be fuel injected?

 

[fargineyesore]

08 iq? wouldnt this be fuel injected?

No this model is not.

 

[geelak900]

Installed one myself on an 07 600 RMK and it works fantastic, no issues whatsoever. Make sure to follow the instructions to the letter. In my case I also leaned out the pilot circuit and fuel screw as they were way rich and it improved my starting, off idle performance and mileage substantially.

 

[BigBuckHunter]

I had one on an '04 700 RMK - I had to jet it when I got to +5000' or it ran rich (real boggy, couldn't climb). After it was jetted for the mountains it seemed fine - never had to touch it again - I gave it to my dad & he rides it mainly @ ~2000' & hasn't had any issues.

 

[Blake Dirt]

I've had one on my 04 900 Cat since new. Ride between 2000'-7000' mostly and have never had to jet. Runs like a dream!

 

[sledhead_2002]

Im running it on a 900 UBR and have twin pipes, no issues works great.

 

[fargineyesore]

I didn't get any instructions.

 

[Grinny]

You can get instructions from the SLP site or from the Holtzman site.

 

[geelak900]

If it was installed correctly which I assume it was, it's easy to recalibrate it. You should get the instructions as suggested above but it's really as simple as checking your main jet to make sure your base line is correct and disconnecting and reconnecting the blue tube at your home base (lowest) altitude. The default setting on them is for -29C so if your main jet is correct for that temp and your base altitude, do the blue tube deal and you should be good to go.

 

[E-Zmoke]

A few issues I was having with my ATTAC last season...set it up at my home elevation. Took it to Revy sled ran like crap on the way up, but seemed ok once I got up but was not right. Next day unplugged the blue hose at the bottom of the hill let it sit for 10 mins then plugged back in. Ran good on the way up and a huge improvement from the prior day. Sled ran good in small climbs, problem I was having was when climbing chutes and going from the bottom of a hill to way up high it would sputter near the top. It ran great if I wasn't changing elevation quickly. Has anyone else had a problem with the ATTAC not compensating quick enough or could it be I'm jetted to high? I will try going down in jets this yr but if it bogs during a big climb again this yr its getting removed.

 

[geelak900]

Something is off for sure. Even if the Attac was not compensating well it should not effect a single climb if all else is correct. The altitude change on most climbs is not enough, unless your climbing for 2000' + type thing.
Start with a good review of the install, make sure all hoses are attached and routed correctly, make sure there is no fuel in them from being upside down.
Your baseline jetting must be right or close. Perhaps clutching is a contributor?
I installed my own Attac on a 07 600 RMK and it has been perfect, ride around Edmonton or have had it to 9000' and it runs flawlessly everywhere. Don't give up on it (unless you like jetting) I don't think that alone is your issue, not saying its not possible you have a bad unit but very unlikely.
What is your basic jetting now and what is your clutching specs, perhaps we can at least confirm all that? For you to have it run like crap down low and improve as you went up indicates it is lean down low, usually it goes the other way, good down low and gets pig rich as you climb forcing you to jet down. Lean down low means DANGER so worth confirming all this.
Cheers

 

[CatMan16]

You should make sure you have your main jets set for the lowest altitude that the blue hose in connected at. The parking lots in Revelstoke are way lower elevation than around Edmonton. So it might be as easy as increasing the main jet size.

When I installed mine on a 01 MC 800 I jetted it for 1000-1500 ft and connected the blue hose in the parking lot in the morning at the Hotel. It worked perfectly at all altitudes for me.