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Tractor Pulling Discussion Forum

Building a fire in my 70

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Ellis Pulling

07-05-2004 17:17:29




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I would like to know if i could put a 730 head on my 70 D.Then putting lp injection to it.If anyone knows wat i can do tell me plz, thanx




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upperpinecreek

07-06-2004 08:39:32




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 Re: Building a fire in my 70 in reply to Ellis Pulling, 07-05-2004 17:17:29  
that is good advice from buickand deere, i have a 70d puller that is completely redone and has all the hp needed to pull 7-9000lb classes running on diesel, but only works well when the combo of weight, balance, hitch, air pressure and tires are correct.



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buickanddeere

07-06-2004 08:00:04




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 Re: Building a fire in my 70 in reply to Ellis Pulling, 07-05-2004 17:17:29  
The very same 70 modified into a 720/730 with LP added question have been posted several times before. Do a search to find many replies. Remember the G and 70's have a very fast 2-1/2+MPH 1st gear. Why not get a 720/730 instead of pouring $$$ into modifying a 70 into a 720/730? If she will spin out in 1st, don't waste your time and money. Work at the weight,balance, hitch and tires to get traction. That's what wins pulls, not HP.

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haha...

07-06-2004 10:12:32




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 Re: Re: Building a fire in my 70 in reply to buickanddeere, 07-06-2004 08:00:04  
i dissagree....if you can run second or third, then your gonna win over the 720d. if its a speed limit, if you can run the speed limit of 3 or 4 mph....then do it, don't go 1.5 or 2....at a dyno pull, it would be good, but them ain't worth a nickel...i would get 100 outta it and then go pullin..2 gear or maybe even 3rd in the 7500 would be good....



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buickanddeere

07-06-2004 11:49:09




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 Re: Re: Re: Building a fire in my 70 in reply to haha..., 07-06-2004 10:12:32  
It's a two cylinder Deere turming 1100rpm, not a modified Oliver turning 3500rpm.DIV II at most. More power or not and particularly on a hard clay power track which is the norm around here.Traction pulls to the end of the track which is farther than spinning out at midway with double the power that isn't kooked up.



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all i'm saying..

07-06-2004 13:20:20




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 Re: Re: Re: Re: Building a fire in my 70 in reply to buickanddeere, 07-06-2004 11:49:09  
all i'm saying is that if you can jump a gear and keep up with the speed limit, do it.



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G-MAN

07-06-2004 13:57:47




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 Re: Re: Re: Re: Re: Building a fire in my 70 in reply to all i'm saying.., 07-06-2004 13:20:20  
It takes a good strong tractor to pull 2nd gear, and a VERY strong one to pull third gear, at least as far as non-creeper Deeres are concerned, and pretty much any other tractor for that matter. Buickanddeere is right - it's not how fast you go, it's how far.



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but.....speed

07-06-2004 21:03:37




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 Re: Re: Re: Re: Re: Re: Building a fire in my 70 in reply to G-MAN, 07-06-2004 13:57:47  
but speed creates momentum..and momentum carries you through the holes and such..y do you think the go fast classes are seperate from the normal? it depends on the weight class on how much power it takes..i nteh 7000, i agree..3rd is almost unspeakable..but 2nd is definately not...and 1100 aint' nothin..i'd be turnin it at 1500..or better....especially if it had a center main..



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G-MAN

07-08-2004 10:43:11




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 Re: Re: Re: Re: Re: Re: Re: Building a fire in my in reply to but.....speed, 07-06-2004 21:03:37  
Yes, speed creates momentum, but the amount of momentum is in proportion to how much speed. Get on a tractor that will run 2 mph and one that will run 5 mph. Get to the same point 3/4 of the way down the track, clutch them both and see if the 5 mph tractor goes 2.5 times as far before stopping dead. I have a $100 bill that says it won't. The only Deere two-bangers with center mains are the 70/720/730 Diesels and the 80/820/830 tractors - not too many of those pulling in the big-boy classes, but they can put a hurting on a lot of iron in heavy-weight stock classes. Sure, you can turn one 1500 rpm or more, but you may not gain much HP because it gets hard to fill those big cylinders well at those engine speeds. I don't really think much of MPH limited-classes myself and all the other b.s. rules that seem to go along with antique pulling these days, which is why I like plain old farm pulls where you pull what you brought in whatever class you can get it in and go as far as you can. In those types of pulls, I've seen stockers beat the pants off souped up tractors. And vice versa.

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buickanddeere

07-08-2004 13:59:33




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 Re: Re: Re: Re: Re: Re: Re: Re: Building a fire in in reply to G-MAN, 07-08-2004 10:43:11  
Last issue of Two Cylinder Magazine plotted the HP and torque graphs. Very intersting look at those HP/torque curves. Makes it easy to see how many operators think they can do more work by letting her lugg down to peak torque and pull a heavier load.Instead of running at the rpms for peak HP to do max work per hour. The 190 cu" and 2-53 were the exceptions with suprisingly flat torque curves. I lean towards a speed limited event if the rules are simple,sensible and enforced. Reduces the advantage and dangers of the III,VI & V class tractors sneaking into the "stock" classes.

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G-MAN

07-08-2004 15:43:04




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: Building a fir in reply to buickanddeere, 07-08-2004 13:59:33  
I agree that speed-limited classes have their place, but it seems like more and more people want more and more rules in order to build a niche that their particular tractor fits into. As far as the upper division tractors being retired and dropping down into the stock and near-stock classes, if those guys want a $3 trophy that bad and really feel big beating up on stockers, more power to them.



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that is why

07-08-2004 21:56:30




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Building a in reply to G-MAN, 07-08-2004 15:43:04  
you have a speed limit of 4mph or 3mph and bring waht you got....and go..no tire limits or nothin...2-300 dollar purse..jump whatever classes...and go..15 or 20 a class in entery fee..its simple. keep the ppl back and they can't get hurt from idiots rappin them too hard



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JDGnut

07-06-2004 12:43:12




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 Re: Re: Re: Re: Building a fire in my 70 in reply to buickanddeere, 07-06-2004 11:49:09  
Most of the pullers in our area are starting to drop the creeper geared tractors in some of the classes now that they are getting the HP out the tractors..
I like the 70D over the 720 and 730.. (I like do the the styling of the later tractors..) I like the lighter weight of the 70D.. and the gearing... If a G can hack it in those weight classes so can a 70D.. with some mild work.. (mild compared to a G..) JDGnut

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JDGnut

07-06-2004 07:31:24




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 Re: Building a fire in my 70 in reply to Ellis Pulling, 07-05-2004 17:17:29  
The 730D head is the replacement head for the 70D.. other things that would help would be the pumps and injectors out out of the 730D.. (pistons too.)Lots of other little things that will help.. Make sure the rack is opening up all the way... The LP will help.. a little.. but not really worth it.. works better on a turbo charged engine... JDGnut



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