714banshee380 Posted August 26, 2008 Report Share Posted August 26, 2008 My friend just said he got his shee back and it had a 425cc stroked motor pushing 145HP! that is psycho. Is this even possible? Quote Link to comment Share on other sites More sharing options...
LS1Inferno Posted August 26, 2008 Report Share Posted August 26, 2008 drag bike yes, anything else no. Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted August 26, 2008 Report Share Posted August 26, 2008 not unless he is running big alky carbs, shooting a big shot is NOS and hooked up to a turbo Quote Link to comment Share on other sites More sharing options...
FMF (FAST MOTHER FUCKER) Posted August 26, 2008 Report Share Posted August 26, 2008 MY BALLS PUT OUT MORE POWER ON PUMP GASS Quote Link to comment Share on other sites More sharing options...
shanYE west Posted August 26, 2008 Report Share Posted August 26, 2008 Running on alky with a HUGE shot like Greg said.. Only way thats happening.. Quote Link to comment Share on other sites More sharing options...
714banshee380 Posted August 26, 2008 Author Report Share Posted August 26, 2008 drag bike yes, anything else no. explain? Quote Link to comment Share on other sites More sharing options...
shanYE west Posted August 26, 2008 Report Share Posted August 26, 2008 To get anywhere near those HP numbers the motor would need VERY extreme porting and it would make it all but useless except for drag racing... The motor would have no bottom/mid power.. Quote Link to comment Share on other sites More sharing options...
chevrolet banshee Posted August 26, 2008 Report Share Posted August 26, 2008 explain? Also you wood need alky. and the biggest carbs you could fit on the thing, with some really high end pipes. that guys running maybe 90hp on race gas. Chevshee Quote Link to comment Share on other sites More sharing options...
714banshee380 Posted August 26, 2008 Author Report Share Posted August 26, 2008 Can someone explain to me what stroking the motor actually is in detail? It's a longer crank than normal oem crankwhich causes a increase in displacement cc's??? Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted August 26, 2008 Report Share Posted August 26, 2008 the pin is moved x distance on the crank. this allows the piston to go farther into the jugs and create more displacement. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted August 26, 2008 Report Share Posted August 26, 2008 the pin is moved x distance on the crank. this allows the piston to go farther into the jugs and create more displacement. It also adds more torque because when you move the crank pin farter out from the center of the crank it gives the rods more leverage on the crank. It is like putting a cheater pipe on a wrench when you have a really tight bolt. Quote Link to comment Share on other sites More sharing options...
714banshee380 Posted August 26, 2008 Author Report Share Posted August 26, 2008 thanks alot banshee-man and jbookey makes alot of sense now. So tell me this for a 425cc displacement the pin would have to be moved.... (answer here) ??? Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted August 26, 2008 Report Share Posted August 26, 2008 thanks alot banshee-man and jbookey makes alot of sense now. So tell me this for a 425cc displacement the pin would have to be moved.... (answer here) ??? It is probably not a 425cc. A 421cc is a real common engine. Most of the time you see 421 cub. It uses a 68mm bore (+4mm over the stock 64mm Bore) and a +4 mill stroker crank. Stock stroke I belive is 54mm so a +4mill stroker crank would be 58mm. The Crank drops right in with no modifications to the cases. The cub cylinder is an aftermarket cylinder that is drag ported right out of the box. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted August 26, 2008 Report Share Posted August 26, 2008 i doubt he is getting 145hp out of it though. 100hp is a desent built 421 cub. After you bolt on a cub cylinder the HP you gain per dollar you spend drasticaly goes down. I am not real familiar with different drag setups and power out put. I am thinking that you would have to have a pretty worked up 10 mill stroker motor to hit 150 hp if you could even reach that. Isnt 130hp a desent number for a 10 mill? Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted August 26, 2008 Report Share Posted August 26, 2008 So tell me this for a 425cc displacement the pin would have to be moved.... (answer here) ??? It would have to be moved out 2mm farther from the center of the crank shaft. That 2 mm will cause the piston to travel 2mm farther up the cylinder, and cause the piston to fall down 2mm farther in to the cylinder. Grand total of 4mm. Quote Link to comment Share on other sites More sharing options...
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