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Old 07-11-2019, 09:55 AM   #11 (permalink)
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You're exactly right Frankie. The mods you have on your sled, I think I've read all your posts, are what I would call optimizing the factory setup. You should have a great running reliable setup. I wouldn't hesitate adding the flowrites or some frogskin material. A fuel controller will bring it all together.
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Old 07-12-2019, 06:45 AM   #12 (permalink)
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we mod. every sled we get. bolt on mostly. and all these little mods make a huge difference. the best thing anyone can do is make sure everything is straight and true. balance everything that spins. the clutch would be #1 these can be way off. we see it all the time. and when every piece is balanced you don't have to worry about aligning it. shim your drive clutch to the belt you use. we run .005 clutch to belt clearance with a new belt. because theses wear in and them become .010-.020. make sure your drive shaft is straight to the tunnel and chain case. run your track loser than the factory spec. but don't over do it or you lose performance. same with the chain. the biggest gain on our pro-stock sled was using ceramic bearings. on ice we push the sled by the handle bars to the line. it's just like it has wheels on it. we are big fans of making a stock sled better. and it pays off. we win or run up front everytime we go racing. and put our stock sled in mod. classes and are still competitive.

so yes all these little things make a big difference in the end. our 18 assault pulled 158 h.p. three back to back pulls no pipe no motor mods at all. and i don't care about feeling h.p. we see it on timers. even 2 h.p. so every gain is a gain.
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Old 07-12-2019, 08:43 AM   #13 (permalink)
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I found shimming a clutch to .010'' is a bit extreme...have had belt issues when switching. When installing some new belts they don't have enough clearance. Max i go with is 015'', .020'' is always safe.
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Old 07-12-2019, 04:45 PM   #14 (permalink)
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I might try stuffing this in it. Think it will fit? J/K. This is the kind of stuff I work on.
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Old 07-13-2019, 07:27 AM   #15 (permalink)
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Quote:
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I found shimming a clutch to .010'' is a bit extreme...have had belt issues when switching. When installing some new belts they don't have enough clearance. Max i go with is 015'', .020'' is always safe.

on our pro-stock. if we get it to the final with .005-.010 clearance we tighten it up to 0. it's made the difference in our wallet or putting back into the trailer. this always improves the 60' time. and in very close racing it's hard to get back by someone in 500' but it's hard on the belt and clutch heat. that's why we wait to the money run to do this.
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Old 07-13-2019, 07:48 AM   #16 (permalink)
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on our pro-stock. if we get it to the final with .005-.010 clearance we tighten it up to 0. it's made the difference in our wallet or putting back into the trailer. this always improves the 60' time. and in very close racing it's hard to get back by someone in 500' but it's hard on the belt and clutch heat. that's why we wait to the money run to do this.
How its changed. Back in the day with our piston port 650 wedge pro stocks we ran at least .060'' belt /sheave clearance with those high engagements to pinch the belt leaving the line. Tried those lower clearance amounts, and it'd smoke the belt. At that time our guys didn't lose very many races over a few years with that much clearance. As far as these case reed trail sleds go, i like to stick to around .020'' or a bit less. You have less hassles, and a smooth working clutch
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Old 07-14-2019, 08:20 AM   #17 (permalink)
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How its changed. Back in the day with our piston port 650 wedge pro stocks we ran at least .060'' belt /sheave clearance with those high engagements to pinch the belt leaving the line. Tried those lower clearance amounts, and it'd smoke the belt. At that time our guys didn't lose very many races over a few years with that much clearance. As far as these case reed trail sleds go, i like to stick to around .020'' or a bit less. You have less hassles, and a smooth working clutch
911 cover with adjuster. to much belt clearance and you jump the belt up the drive clutch. @ 7500 rpm engagement this would bog like a bitch. timers don't lye. our sled has done 4.89 @ 99 mph in 500'. and has beat 800 pro-stock sleds. Nate McCoy motor jaws pipes. pretty impressive for a short stroke 600 ves.
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Old 07-14-2019, 08:39 AM   #18 (permalink)
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911 cover with adjuster. to much belt clearance and you jump the belt up the drive clutch. @ 7500 rpm engagement this would bog like a bitch. timers don't lye. our sled has done 4.89 @ 99 mph in 500'. and has beat 800 pro-stock sleds. Nate McCoy motor jaws pipes. pretty impressive for a short stroke 600 ves.
You can't compare those old piston port fuji triples with the liberty case reed twins...different animal. The only good thing about those old piston port motors is they could turn some good rpms quick.
The liberty 600 twin was an overachiever when it came about, and it still performs well.
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