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How 'bout a little more low end grunt in a 70?

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Pete

02-12-2001 15:28:07




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I saw the message pertaining to the gears in a '49 A and how to slow it down or give it a little more low end punch...man if he thinks he has a high speed low, try a 70. Actually, haven't ever powered out YET, always spins, but the draw bar has been reconfigured for this year and we're hopin'! Usually pull in the 7500# class, and stock except a .40 overbore. It's never embarrassed us, couple of 2nds, but no wins.
thanx, Pete

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Don

02-12-2001 19:21:40




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 Re: How 'bout a little more low end grunt in a 70? in reply to Pete, 02-12-2001 15:28:07  
Has anybody tried to put 70 diesel pulley and reduction gears on ? I have a 70 but dont pull and have alway's wanted to try this. The diesel pulley gear is smaller so would slow you down. You would have to use the reduction cover as well . There is a gear in the bottom of the diesel cover you would have to leave out. Just curious. Don



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Bruce

02-12-2001 19:02:24




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 Re: How 'bout a little more low end grunt in a 70? in reply to Pete, 02-12-2001 15:28:07  
Hi Pete, I'm the guy with the 49 "A". Here's a couple of my secrets:
1. I run tire pressure low (8# on 12.4's - varies with tire size & type construction). Why? Because it gives me a lower gear to the ground (smaller effective tire diameter). Of course I have to plan my hitch setup for this to keep max hitch height.
2. I slip the clutch ALOT when starting (JD clutches are Built Tough) and try to keep my RPM about 1/2 to 2/3 on startup. If I have enough traction I'll open it up as I get moving (kinda tricky). All this depends on track conditions. These suggestions are for static sled pulling (stone boat).
Bruce

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Pete

02-12-2001 19:48:29




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 Re: Re: How 'bout a little more low end grunt in a 70? in reply to Bruce, 02-12-2001 19:02:24  
Thanx Bruce, I try to get three tread bars on the ground prior to hook up, always get a good start, but end up spinning out on end. Never tried a boat. Biggest problem was that several of the pulls I attend don't weigh,allow liquid ballast which I use or 1 set of stock weight per rated plow bottom. Several pulls I ended up pulling against 720's and 730's...no fun. They finally put the G's and 70's in a new class, "Big 3 bottom " against Super M's and such...much better!
I like weighed pulls as I make 7500# class...several 2nds, always lost to the same souped up Super M, once by 6" and once by 4", gotta change drawbar height a little and get out of my throttle a little sooner. Let flywheel momentum finish for me. Pete

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BigJ

02-12-2001 17:14:43




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 Re: How 'bout a little more low end grunt in a 70? in reply to Pete, 02-12-2001 15:28:07  
I put mine on a hard shiney track once and the front wheels got about two inches up and it just about quit and I had to clutch it.But that was the only time it ever done this.I also went from 14.9's to 15.5's and the shorter tire helped a little since.What size tires are you running and is yours a gas or all fuel?Jack(TN).



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Pete

02-12-2001 18:04:02




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 Re: Re: How 'bout a little more low end grunt in a 70? in reply to BigJ, 02-12-2001 17:14:43  
Jack, It's a gasser, running new 14.9-28 Titans. probably a better tire to pull with, but the $'s were short when the tires were needed. Thanx, Pete



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jdeere70

02-12-2001 17:12:12




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 Re: How 'bout a little more low end grunt in a 70? in reply to Pete, 02-12-2001 15:28:07  
Here`s how I describe the gearing in a G or a 70. They don`t have a low gear, just first gear!



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G Taylor

02-12-2001 21:18:04




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 Re: Re: How 'bout a little more low end grunt in a 70? in reply to jdeere70, 02-12-2001 17:12:12  
That 70's reverse is also good for getting home quick if late for supper. Gets interesting backing a hay wagon up the gangway into the barn.



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clooney

02-13-2001 12:46:12




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 Re: Re: Re: How 'bout a little more low end grunt in a 70? in reply to G Taylor , 02-12-2001 21:18:04  
G Taylor, I hear you on that reverse. I have the reverse hi/lo pin removed from my 70 so I have both hi & lo range reverse & reverse in high range is faster than a sane person should ever attempt to go backwards.



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DP

02-12-2001 18:57:32




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 Re: Re: How 'bout a little more low end grunt in a 70? in reply to jdeere70, 02-12-2001 17:12:12  
I know what you mean, I run 18.4-38 8 plys on my 38 G. It moves right on down the track.



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Pete

02-12-2001 18:04:49




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 Re: Re: How 'bout a little more low end grunt in a 70? in reply to jdeere70, 02-12-2001 17:12:12  
How true 70!



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