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This is a very easy swap. No need to lengthen frame rails. Done a couple of these and can send pictures if you would like.
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4020 Farmer
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Last run before we broke.
by
4020 Farmer
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We generally pull the sled @ 20 mph or just a little more according to the sled with 20.8x38. This is at 3000rpm.
With 18.4x42 we go a little faster because they are bigger around. Regardless we could use a little higher gear.
I post a video tonight so you see what it runs like.
by
4020 Farmer
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466 cid
S-366 turbo- 2.66
cam
P-pump with 4-28 dual feed injectors
simpson water injection
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4020 Farmer
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Thanks J&R!!!
I can see how to figure it now.
I was only counting one of the two 28 tooth gears for 7th. This what was throwing me off .
by
4020 Farmer
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J&R Thanks for the help.
Can you show me how to figure this? I'm doing something wrong.
What would the ratio be if I put the 4020 finals back on???
I am planning on pulling in our 3000 rpm pro field class this year with 20.8x38 151's uncut.
What ratio do most pullers in this type of class run?
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4020 Farmer
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Does 25:1 sound right????
by
4020 Farmer
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Have been pulling a 4020 with a stock transmission with 4010 planetaries. We have been pulling in 7th gear.
The transmission let go so we have decided to get a 3 speed.
I am having trouble figuring what final ratio I have right now. How is this figured?
Thanks for the help!!
by
4020 Farmer
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