dlcentral Posted May 23, 2000 Share Posted May 23, 2000 Probably less than half the horse to run a gear drive. I have a 7.0hp Wonderboy that runs just fine and cuts a 32" path! All Fact. original Eng. and mower and tranny that is! dlc Link to comment Share on other sites More sharing options...
Good_Ole_JR Posted May 23, 2000 Share Posted May 23, 2000 If my 3 speed Allis Chalmers B-1 had 10 hp I would think I died and went to heaven. I used it for 20+ years with 7 1/4 hp pulling a 42" mower deck. Roy Link to comment Share on other sites More sharing options...
Al Posted May 23, 2000 Share Posted May 23, 2000 Also the "torque" of a cast iron single cylinder engine makes it feel like almost double the power of an aluminum single cylinder with the same HP rating. Link to comment Share on other sites More sharing options...
Guest Posted May 23, 2000 Share Posted May 23, 2000 SENSE YOU GUY SAID IT TAKE 2 HP TO TURN A HYDRO THEN HOW MUCH DOES IT TAKE TO RUN A GEAR DRIVE TRANNY? WILL 10 HP BE ENOUGH?? Link to comment Share on other sites More sharing options...
dlcentral Posted May 24, 2000 Share Posted May 24, 2000 The secret to the torque and longevity of these old cast iron engs. surely is the longer stroke and rod as compared to the bore size.The new alum versions have a more 'square'[equal] bore to stroke ratio,which makes more h.p. per cu. in. but less torque.Good if your racing but not good for longevity.That's the main reason Kohlers are used in the pulling circiut,they are more suited to producing h.p. than torque as they have a square bore to stroke ratio.In stock configuration that is! I know they do modify this for pulling engs.. Just my opinion of course! dlc dlc Link to comment Share on other sites More sharing options...
dlcentral Posted May 24, 2000 Share Posted May 24, 2000 The secret to the torque and longevity of these old cast iron engs. surely is the longer stroke and rod as compared to the bore size.The new alum versions have a more 'square'[equal] bore to stroke ratio,which makes more h.p. per cu. in. but less torque.Good if your racing but not good for longevity.That's the main reason Kohlers are used in the pulling circiut,they are more suited to producing h.p. than torque as they have a square bore to stroke ratio.In stock configuration that is! I know they do modify this for pulling engs.. Just my opinion of course! dlc dlc Link to comment Share on other sites More sharing options...
dlcentral Posted May 24, 2000 Share Posted May 24, 2000 The secret to the torque and longevity of these old cast iron engs. surely is the longer stroke and rod as compared to the bore size.The new alum versions have a more 'square'[equal] bore to stroke ratio,which makes more h.p. per cu. in. but less torque.Good if your racing but not good for longevity.That's the main reason Kohlers are used in the pulling circiut,they are more suited to producing h.p. than torque as they have a square bore to stroke ratio.In stock configuration that is! I know they do modify this for pulling engs.. Just my opinion of course! dlc dlc Link to comment Share on other sites More sharing options...
DaveL Posted May 24, 2000 Share Posted May 24, 2000 Its also the heavier rotating mass. Link to comment Share on other sites More sharing options...
ka9bxg Posted May 25, 2000 Share Posted May 25, 2000 And how about better heat dissapation? I don't think you will ever find a perfect 100% contact between a cast iron liner and an aluminum bore,even if iron does have a higher expansion ratio. Kohler made one of the only 2 cycle snowmobile engines with 100% cast iron cyls. I never saw one in a basket from over heating. Detonantion mabey. I've seen plenty of 2 cycle iron bore aluminum air cooled sno-mo engines burnt from to much heat. Also, just my opinion. Link to comment Share on other sites More sharing options...
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