shanYE west Posted February 5, 2006 Report Posted February 5, 2006 Has anyone seen or heard of a turbo mod done to the crank webs? here's a link http://www.snowtechmagazine.com/articles/2002/turbocrank.php I talked to the guy and he said it makes pretty good hp gains on the banshee. just wondering if anyone tried it and if it was worth it? Quote
AZ Olie Posted February 5, 2006 Report Posted February 5, 2006 I had a Turbo crank in my old 88 TRX 250R, couldn't tell if it worked or made any difference, cause I tricked the whole engine @ one time by PR Racing from Toledo OH... It would be interesting to know if it really work's... Olie Quote
rocketboy Posted February 6, 2006 Report Posted February 6, 2006 thats not really where the power is being made ,all thats gonna do is drain the bank account iMO Quote
shanYE west Posted February 6, 2006 Author Report Posted February 6, 2006 The sled had about 9% increase in HP on the dyno. On my banshee thats like 6-7 hp if the banshee yeilds the same gains as the Polaris sled. Depending on price, and if gains are similar.... Might be worth looking into... Quote
1000dollabill Posted February 7, 2006 Report Posted February 7, 2006 that's wild. i'm sure it has a lot to do with rotating mass and mixture rates. did they say how much it cost? really intresting none the less. Quote
shanYE west Posted February 10, 2006 Author Report Posted February 10, 2006 I dont know what he charges I thought he said like $300, but I dont know if that was for a triple or twin. He claims that it generates a turbine affect that throws more fuel up the transfer ports. Quote
FASTOYS Posted February 10, 2006 Report Posted February 10, 2006 Might check Trinity racing as they used to be big into that. Dont know if they still do it or not.... Quote
lowriderb Posted February 11, 2006 Report Posted February 11, 2006 (edited) i read about this a few years ago, it seems that the rotational mass is cut down which will let you increase the rpm's giving you a sleight gain.. but they only tell you the hp numbers after their whole engine has been worked out.. the gains from just the crank were like 8% according to their site.. which isnt much, you can spend time tuning your bike in better and gain that.. oh yeah, its almost deffinitly not good when they start out saying that the builder of these cranks and such isnt really sure on why it work also... Edited February 11, 2006 by lowriderb Quote
Fireroad Express Posted February 11, 2006 Report Posted February 11, 2006 ask any successful snowmobile racer that runs a prostock race sled if he runs a "turbo" crank .(no will be the answer).or maybe call any reputable builder-( The Crankshop or Hooper Racing). Racers routinely rev there sleds between 9-10,000 rpm(tripples).if this mod works better with high revs, it would be of the most advantage and produce the most HP in this type of application. if there was any advantage to a mod like this, every racer would run one. anybody can produce "showponies" on a dyno. bring it to the track and see what happens. spend your money on porting or other proven mods if you are after more power. Quote
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