Bigdogtrucker Posted April 10, 2012 Share Posted April 10, 2012 My B75 has a 673,quad with main direct in 4th.Tires are 11R24.5's,rear is stamped 5.74.Any ideas what the speed will be at 2100? Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/ Share on other sites More sharing options...
leversole Posted April 10, 2012 Share Posted April 10, 2012 With a 43 inch tire height and a .70 overdrive in 5th Hi split....you will see 66.9 mph at 2100 rpm... Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/#findComment-113592 Share on other sites More sharing options...
Bigdogtrucker Posted April 10, 2012 Author Share Posted April 10, 2012 That works for me,thanks! Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/#findComment-113596 Share on other sites More sharing options...
slpwlker Posted April 10, 2012 Share Posted April 10, 2012 I think that might be alittle much. I have 5.60 in the low side of the rears. Now mind you Idk what my od is in 18th is but 60 flat out at 2000.rpm is all I can get out of it. 4.11 on the high side and it is a upper 90's truck then Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/#findComment-113651 Share on other sites More sharing options...
Bigdogtrucker Posted April 10, 2012 Author Share Posted April 10, 2012 Heres a pic of the stamping,cleaned it off better.Would it have 4:33's or 5:74's? Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/#findComment-113669 Share on other sites More sharing options...
leversole Posted April 10, 2012 Share Posted April 10, 2012 I think that might be alittle much. I have 5.60 in the low side of the rears. Now mind you Idk what my od is in 18th is but 60 flat out at 2000.rpm is all I can get out of it. 4.11 on the high side and it is a upper 90's truck thenThat wasnt a guess! It is simple math... Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/#findComment-113713 Share on other sites More sharing options...
Bigdogtrucker Posted April 10, 2012 Author Share Posted April 10, 2012 Anyone know what all the numbers mean in the stampings? Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/#findComment-113715 Share on other sites More sharing options...
slpwlker Posted April 10, 2012 Share Posted April 10, 2012 That wasnt a guess! It is simple math...Wasn't trying to step on anyones toes. I just know on 24.5 rubber with the rears in low on the 5.60's 60 is it for me but this is with a Eaton 18. Flat out foot to the fire wall, even trying the Flintstone shuffle. Quote Link to comment https://www.bigmacktrucks.com/topic/24425-top-speed/#findComment-113739 Share on other sites More sharing options...
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