machz830 said:what is your gearing now?......My mach z stock was 26/44.I can change anywhere from a 24 to a 27 on top.Don't be afraid to try changing..............Dynamo Joe has done hours of testing on this and will tell you by dropping several teeth on top DOES NOT MEAN you'll lose top end.alot of it is based on clutching as well.Don't believe all that you'll lose top end stuff.try it.you should gain acceleration.
So your sayin when you ice drag and drop your gears 4 teeth from stock, you take off like a bat out of hell and still get your same top end? So a 20/44 tooth configuration that hits 108 on the 1000ft and 110mph max, will be just as fast as the stock 23/44 config that hits 121mph on same lake 1/2hour after gear change? Your out of your mind. Once you hit your maximum rpm range the rotating assembly cannot go as fast as higher gears than lower gears that slow down the secondary, or lower gear. So when your top gear rotates 1.91 times to make 1 revolution of the bottom gear it will be faster than 2.2 times per 1 revolution? Come on now, think about it. When your sittin at 8900 rpms and your sled goes 108 then you bump up gearing back to stock and your hittin 121 at 8700rpms, thats basic arithmatic my friend, not a few hours of testing. I went through 2 gallons of gearlube changin gears and trying different ratios, and it took way more than hours more like weeks and lots of moola.JoeyO said:Yup, right on. I've seen ppl dropping 4 teeth smaller on the top gear and still hitting there same top end speed. I've droped 2 teeth and i'm still getting the same top end i've always gotten. I just get there faster.
What you need to do is trade that 670HO for a Skandik.cgies said:My reasons for a gearing change are:
1) There is a drastic power band hit right at the speed that I like to drive at on the trails (25-30 mph) and I would like to change that spot. I don't need any more top end.
2) I pull a sleigh and haul all the fire wood to heat my house so lower gearing wouldn't hurt!
Thanks for the posts.