440 engine speed

Metallica19991 · Post by **Metallica19991** » Tue Dec 11, 2007 8:58 pm

How fast do anyone of you guys think i any 440 could go? like i dunno any JD with a 440 in it... My friends say it wont go faster then 40mph... which i think is Bull... so i was wondering if anyone has tacked there sled out. and what was the top speed...? Thank You...

harleysportster · Post by **harleysportster** » Tue Dec 11, 2007 9:20 pm

unofficially, my 440 liquifire tops out around 75 or so. This is with ideal snow conditons and properly tuned.

bob15 · Post by **bob15** » Tue Dec 11, 2007 9:22 pm

What sled? A Trailfire will hit 55-60. I have gotten my Liquifire to around 75 before I slowed, and the sled was still pulling. Reason for braking was a stone wall coming up very fast. My brother was doing about the same (he was running another LF next to me). This was on private land open to us only. When I am trail riding on state land, the speed limit is 45, so that's how fast my sleds go. Too many game wardens with radar guns and too many idiots that want to go 75 on twisty trails to make going any faster worth it. Been almost hit more times than I can remember by people not respecting other drivers and obeying the law.

As for speed, besides gearing, trail condtions (ice, powder, deep snow), how well the sled is tuned (pig rich or tuned well), how heavy the driver is ( is the driver 150 or 225 pounds?), and how much nerve the drive has; all makes a difference.

bob

Metallica19991 · Post by **Metallica19991** » Tue Dec 11, 2007 9:30 pm

well im 150ish... and i just bought a 1978 polaris Cobra with a kawi 440 engine in it... does anybody think this sled could go over 70 mph? if you need some pics then please go to this link:

http://nh.craigslist.org/rvs/495845792.html

Thank You!

S_Kyle · Post by **S_Kyle** » Tue Dec 11, 2007 9:35 pm

I little off topic, but we clocked by buddies 400 @ 65 MPH last winter. In a ditch running along the highway

Metallica19991 · Post by **Metallica19991** » Tue Dec 11, 2007 9:37 pm

ok so you guys think a 440 could def go 70mph? if its all right. snow etc..

S_Kyle · Post by **S_Kyle** » Tue Dec 11, 2007 9:38 pm

As far as I am concerened, The right conditons and you can

Metallica19991 · Post by **Metallica19991** » Tue Dec 11, 2007 9:42 pm

yeah thats what i thought... i mean 40mph... NO WAY! people are on crack if they truly think that...

JDFanPa · Post by **JDFanPa** » Tue Dec 11, 2007 11:09 pm

theres a kawi motor in a polaris???

440 invader · Post by **440 invader** » Tue Dec 11, 2007 11:26 pm

Is it a fan motor or a liquid motor? My '79 Kawi Intruder will do 75 mph all day and thats a 440 fan,my 440 Invader will do 80-85 all day ....both on nice hard packed snow,with my 160 lb butt on them.....and both will go even faster on ice.

b00stinGTP · Post by **b00stinGTP** » Tue Dec 11, 2007 11:31 pm

My 340 cyclone will do 60. Back in the early 80s my dad said his buddies 81 liquifire 440 would breeze right by him top end on the lake.

JoeRainville · Post by **JoeRainville** » Tue Dec 11, 2007 11:35 pm

Met,

Have you not read any threads on this page, specifically the one about the fastest Deere? Yes, 340 Liquidators were in fact clocked at 100 MPH on ice.

Also note that 440 cc sleds ranged in HP from the mid 20's in the early 1970's, to the high 80's during the early part of the 1980's. SnoCross 440cc racers ranged in HP from the high 90's in the late 1990's to about 110 from 04-07.

Even 1973 JDX-8's were about 42 hp, and would hit 65 plus on snow. Cyclone 440's were about 45 hp, while 70's LF were 55, and the 80's LF were about 65 hp, and could crack the high 80's to low 90's set up properly. So quit worring about what some uninformed teenage "expert" think about sled motors.

-Rainville

B)

JDFanPa · Post by **JDFanPa** » Tue Dec 11, 2007 11:58 pm

Joe thats why I made the kawi in a polaris statement wrong motor in wrong sled could be bad for speed and if its an early cat motor with a tillitson carb etc he might be lucky to get 45mph.

Metallica19991 · Post by **Metallica19991** » Wed Dec 12, 2007 1:07 am

alright! well sounds good.. i mean 440 will prolly have like 45- 50hp as you just said... im def going to try it.. Thanks for the info!

Deleted User · Post by **Deleted User** » Sat Dec 15, 2007 8:54 pm

Just today i had my liquifire at 100 mph and it still had more left in it