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truck with 2150 rpm eng 13spd od trans lp22.5 tires 2.93 rockwell rears.assuming the od trans is pretty much the standard ratio what should the road speed at 2150 in od be?

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100-105 mph using .78 over with a 38-39 inch tire variable.

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i came up with 115.8 mph

2150 rpm

using .73:1 transmision ratio

2.93 rear end ratio

and 19.2 as the loaded tire radius witch is what i came up with on a online search for 11r22.5's

used this online cacluator found threw a quick internet search

http://wahiduddin.net/calc/calc_speed_rpm.htm

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i came up with 115.8 mph

2150 rpm

using .73:1 transmision ratio

2.93 rear end ratio

and 19.2 as the loaded tire radius witch is what i came up with on a online search for 11r22.5's

used this online cacluator found threw a quick internet search

http://wahiduddin.net/calc/calc_speed_rpm.htm

think this one is right i don`t know exactly what my over ratio is but i gave up at 1950-60

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Yes but running in 11th or direct at 60 mph you should be just under 1500 rpm. You should get killer fuel milage. Drive correctly of course.

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Wow, I wish mine was like that. I get a top speed of 53 MPH in the top 6th gear (overdrive) at 2100 RPM !

its really quite useless unless you like high speed driving awards. i`d like a little more than 53 though :loldude:

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the ratio more then likely a direct or not a long legged od. Had an old swift truck I drove the boss took the lopro 22's off and put tall 24.5's the 13 wasn't direct but was an .86 od. to long a leg for it's own good. 90 bobtail flat out. Not due to reaching the top gear it didn't have enough ass to get past that

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that tall of gearing you probley run out of motor before you do rpm's in the high hole and you will run out of clutch and drive shafts trying to get a load moving out of a field road

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that tall of gearing you probley run out of motor before you do rpm's in the high hole and you will run out of clutch and drive shafts trying to get a load moving out of a field road

true on all counts must be very careful where you go with this thing 440 cat will wring a shaft in a heartbeat especialy backing up a grade cc

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My B model has enough gear for 85 mph. Only way it will get there is off a cliff :tease:

I have had it near 80 bobtail once.......on a few miles of level ground. Any kind of grade and it slows it right back down.

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My 01 pete 550 cat 18spd 3.25 rears would go 108.

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its really quite useless unless you like high speed driving awards. i`d like a little more than 53 though :loldude:

Yeah, it used to be a municipal truck that never went out on the highway so they probably didn't need the speed.

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I have turned this thing loose only once` one night in nevada I decided to see where it would go so on one long straight run with a little downgrade to it I ran the 90 mph,speedo.out of numbers and to a straight down position where it stuck` had to replace the speedo head when I got to vegas . from all the answers i have gotten here I think the( doubting thomas) is convinced that it will get into triple digits thanks for all the comments guys.

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I have turned this thing loose only once` one night in nevada I decided to see where it would go so on one long straight run with a little downgrade to it I ran the 90 mph,speedo.out of numbers and to a straight down position where it stuck` had to replace the speedo head when I got to vegas . from all the answers i have gotten here I think the( doubting thomas) is convinced that it will get into triple digits thanks for all the comments guys.

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