Sled: Arctic Cat

Right now i'm running a D&D orange spring ( 170-305 ) with 10-64 weights and a 60/46 helix revs around 8400rpm.It jumps out of the hole good but seems to stuggle to find its legs after 85 mph woundering if I should got to lighter weights and helix change?I have a powerbreather on it and v force reeds and monoblock head .It tops out in the low 120mph range I can outrun a 03 XCR 800 by about 3mph.Should this sled be quicker or is that it?Its a 2002.

A T Cat that runs low 120 mph, is a strong running T Cat in my opinion. I have a few of them so I know what I am talking about. And being a cat guy I respect the performance of an XCR 800 . They are very fast sleds. I would say you have a good running T cat and should be proud of what you got. I have yet to see very many of the new  sleds beat your marks.

Thanks.You just hear stories of guys doing 130 on fairly stock setups.Still think I can get more pull on top.Will try some different setups this winter.Found lots of info on hardcoresledder.com

Hey Greenpants, what year is your t-cat? In my experiances, this should not even be a race with a well clutched and jetted Tcat. I would definetally throw some more weight at it as you are running to high on your rpm, i believe all the 1000 tcat should run at 8250? Check your manual. Also these motors run the best when they are loaded down, out of the hole you should be hitting around 8100-8150 and slowly climbing up to 8250. The helix you are running is going to get you  a very good hole shot, but will lose a few mph on top. I think the tcats are geared at 119, so what you REALLY want to do is get to 119 as fast as possible. I run a 60/40 in my 99 tcat, and love it.

Good luck.

you can also try softing up the primary spring 143/290  to pull the top rpm down

higher engagment can be done by tucking the weights or remvoving a shim

behind the spider  . You may also want to add timing  2 degrees a timing key

or slotting the timing sensor   . just food for thought  ,

The manual says to run it at 8500rpm.Yea this thing should run like a bat outa hell.I have the monoblock head on it with high compression insert,powerbreather,v-vorcereads,down jetted one size,not sure about the timing key bought it used but not gettin top end

I would try a steeper helix at the top....if you go from a 46 to a 40, your RPM's will actually go up....try a steeper helix....like a 48 or 50......should help find her legs a littler quicker.

I have a 01 with a D&D 60/40 clutch and run a purple spring in the secondary and orange in the primary also D&D trail pipes V foece reeds power breather changed gearing to a 41 / 22 and can walk away from alot of sleds on the big end believe it or not run around 8500 RPM and run 64 gram weights have ran against alot of T Cats with stock gearing and they cant believe I changed my gearing and have the big end.

too bad black magic is out of buisness, they great clutch kits for 93 t-cats up through 02. i always ran 60/40 or 60/42 when i went to 1098 bigbore, i went up in weght as i had pipes and head cut, then bored carbs and ported cylinders. started out with 63 or 64 weights and ended up at 67 on the bigbore. i ran black and red primary and black and orange secondary if i remember right. i have the spring part #'s and spring rates written down, i'll look for them. ran this on my 2001 with black magic pipes that where suppossed to run best 8600-8800, but ran best coming out at 8400- and reving up to 8600 no more. for radar runs i tried adding 3 extra grams weight and i went 114 in a 1000ft. on a 45-48* weather. i was doing from 110-113 before that the sled always ran better 2nd and 3passes even when back to back. when i went to the side and ran against ther other sleds i found the sled was quicker with the lighter weights which we switched back. i always used 24/39 stock gearing, i would'nt go up more then 1 tooth, unless you want a pig down low.

note: we found the t-cat tachs always read around 1500 rpm,s fast when we tested them. so 8750 on the arctic cat tach was actually 8600 on the digital i ran, and when tested.

Hi Greenpant

 Did your cat run 120 on radar?   If so that's good.

Never the less I installed a D&D Big Dawg clutch kit in a T-Cat and it was spot on.

One of the very few kits that were.

Good luck Link

i would say d & d or cpr clutch kit is the way to go. i ran against a few t-cats with the d &d setup. at least one of them was setup exactly like mine as far as porting and carb bore and the other one was setup too, just not sure of the particulars. always jumped them off the line,  the sled with the same engine work was equally fast on top but consistently 2 sleds off in the first 100ft. almost the same with the other except we were 1 to 2 mph faster running 660 and 1000ft.

bm and cpr pipes are vary similar in design, just the bm are a tad shorter and make power a little earlier.