Hello My Fellow Vintage Enthusiasts,
I have always been interested in horespower ratings for vintage sleds, especially the high horsepower performance sleds.
Let's start a list of vintage sleds, and their official horsepower ratings. Include any published data, articles, or stats if you have them. Let's see how many we can get.
I'll start. Here are the specs on the Merc Sno Twisters:
I missed out a chance to run my buddies vintage sleds on the island this weekend (wife had to work). He has a 77 skidoo 250 super stock ,77 skidoo 340 super stock and a 660 cat. Hope to go next year with my 78 RV 340 or 75 Moto-ski 340 TS (if there ready) . Hey there ready2race get us some pics will ya.
77/78 skidoo rv 340 rotax free air twin 34mm carbs and twin pipes 63 hp
This site has loads of great vintage info. I'm sure you guys know about it, but there are scans of original sales brochures and magazine articles, in case you haven't seen it. http://www.vintagesnowmobiles.50megs.com/BROCHURES.html
I missed out a chance to run my buddies vintage sleds on the island this weekend (wife had to work). He has a 77 skidoo 250 super stock ,77 skidoo 340 super stock and a 660 cat. Hope to go next year with my 78 RV 340 or 75 Moto-ski 340 TS (if there ready) . Hey there ready2race get us some pics will ya.
77/78 skidoo rv 340 rotax free air twin 34mm carbs and twin pipes 63 hp[/b]
To bad you couldn't make it,,hope to see your buds sleds there,, you guys have a nice line up ,, yeah, I'll try to get some Pic's should be fun to an otherwise DULL winter,, R2R
Does anyone know what the hp's were on these sleds?
1- 1981 polaris indy 500 centurion.
2- 1978-1984 eltigre 6000
3- ski doo blizzard 9500-9700
4- early arctic cat king cats and ext's
5- 1980's kawasaki 440 invaders and the 550 interceptor.
1977 Rupp Nitro 440 L/C is rated @ 85 HP and listed to achieve 80-85 MPH. Even the smaller Nitro 250 is listed at 45 HP and rated 60 MPH top speed. Those were the days!
Does anyone know what the hp's were on these sleds?
1- 1981 polaris indy 500 centurion.
2- 1978-1984 eltigre 6000
3- ski doo blizzard 9500-9700
4- early arctic cat king cats and ext's
5- 1980's kawasaki 440 invaders and the 550 interceptor.[/b]
Took a few pic's at the races on the weekend ,,hopefully get them posted later this week,,,here is a pic of my nieghbor 78SRX and his old 76' 340SRX(,top), can't find the big 300ET pic
Popular mechanics had a write up of sleds for the '75 model year and the '75 nitro f/a 340 was 65 hp and the 440 was 75hp. The host of the rupp message board just had stock '76 nitro's dyo'ed out the 340 was 73 hp and 440 was 93hp @ 8300 rpm. The '79 Kawi invaders where about 60-65 hp. The liquid cooled chapperals with the Xenoah 440's were 35hp.The Suzuki fury was 60hp. The 4 cyl. king cat mentioned earlier was probably low on hp. due to it probably had montana pipes on it. They don't make anywhere near the hp of tuned pipes. All the hp. ratings are going to be all over the place depending on the source, the factory ratings I'm sure will be exagerated or like the car companies of the era based on a blueprinted handbuilt unit.
john deere liquifire with a 440 kawasaki engine had a factory rating of 65 hp. kawasaki invader with the same engine made slightly more hp by virtue of more compression more ign timing.and better breathing. around 72
92 mach-1 617cc @109hp
5500 blizzard 497cc @55hp
69 alpine 50000newton/meters @500rpm lol
Some of these numbers crack me up! Some are right on the mark and some are way off in dreamland. The H.P. debate with old sleds never dies and the shit is waist high when the talkin' gets going! LOL!
The 76' Sno-jet SST factory rating is a big overkill at 52 and a single 34mm Mik. I think it's more around 42-45hp IF they can even run decent beyond 5000 RPM with their shitty points magneto. I'm not saying all points were crap but that year SST has a particularly flimsy magneto!
WoW .I always thought they were closer to @70/75 hp. The 67 hp not much higher then the 63 hp the 340 FA RV made, but the Fee Air was only 350 lbs compared to the 420 lbs Blizzards. Can any one else confirm these #.
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