Vintage Sled Horsepower Ratings Thread - Page 3 - HCS Snowmobile Forums

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Old 03-13-2007, 01:51 PM   #21 (permalink)
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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
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Old 03-18-2007, 08:24 PM   #22 (permalink)
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Current Sled(s): 1998 Arctic Cat Thundercat
Previous Sled(s): 1970's consumer track/trail sleds, mostly Sno-Jet and Yamaha
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1974 Yamaha GPX 433F, 62 HP

1975 Yamaha GPX 433G, 65 HP

1975 Yamaha GP 433 F, 40 HP

1978 Yamaha Exciter 340, 38 HP

1976 Sno-Jet SST 440, 52 HP

1976 Rupp Nitro 440, 84 HP stock
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Old 03-29-2007, 01:43 PM   #23 (permalink)
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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!
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Old 03-29-2007, 05:45 PM   #24 (permalink)
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1979 Ski Doo Blizzard 7500+ / 1979 Moto Ski Super Sonic 340 LC 67 HP ( Per Snow Goer Magazine back in the day)
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Old 03-29-2007, 06:27 PM   #25 (permalink)
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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!

Alot of my info is "factory" ratings.
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Old 03-29-2007, 08:27 PM   #26 (permalink)
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Quote:
1979 Ski Doo Blizzard 7500+ / 1979 Moto Ski Super Sonic 340 LC 67 HP ( Per Snow Goer Magazine back in the day)[/b]

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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Old 08-07-2007, 02:48 PM   #27 (permalink)
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From my sled collection.

1981 SRX 440(E) Std. 88 Hp 9000 Rpm (Race Tuned 95+ Hp)

1982 SRX 500(F) Std. 93 HP 9000 Rpm ( 100+ Hp. Former Race sled)

1982 Interceptor 550 Std. 84 Hp 8400 Rpm (Aaen Stage Tuning 9000 Rpm 100+ Hp)
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Old 08-08-2007, 08:08 PM   #28 (permalink)
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stock 77 srx 440 . jetted for drag racing 660' 102 hp , full mod 77 srx 440 120+ hp all measured on a good dyno. these are not trail rideable..........
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Old 08-11-2007, 07:27 AM   #29 (permalink)
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Sorry. Im correcting myself from my last reply. On the Hp Rating to the Kawi Interceptor 550. It should be 94 at 8400Rpm. not 84hp. that Hp should be closer for the Kawi 440 Ltd 4/6 W/Dual plug head.
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Old 08-11-2007, 09:00 AM   #30 (permalink)
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Quote:
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 #.[/b]
Type Ski doo Motor 245 Free Air Rotary Valve 42 HP, Type 76 -77 345 48 HP,1978 Type345 (340cc) Had 5 port cylinders My guess is NO more than 53 HP. So the 67 HP in the Type 354 liquid was a improvement over the 78 345 type. The RV Guy
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