28 10.5 tires

[bigboybodry]

thank guys I going to need all the help I can get going from a 31x10.5w to a 28x10.5. I was thinking along the lines of a 3.50 gear to start?

[kpeztruck]

Originally Posted by bigboybodry

thank guys I going to need all the help I can get going from a 31x10.5w to a 28x10.5. I was thinking along the lines of a 3.50 gear to start?

What kind of class you running? Heads up, index, bracket? If heads up, I would not switch to such a tall gear. I plan to run the same tire on my truck, with a 540 BBC on one fogger with a large tune up. I have the MSD 7531 to help manage power, as well as some chassis and engine tricks. The converter will also have to be correct for the combo, but you can fly on a 28x10.5 tire, and still run the proper gear to pull hard through the finish line. Paul
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[bigboybodry]

Originally Posted by kpeztruck

What kind of class you running? Heads up, index, bracket? If heads up, I would not switch to such a tall gear. I plan to run the same tire on my truck, with a 540 BBC on one fogger with a large tune up. I have the MSD 7531 to help manage power, as well as some chassis and engine tricks. The converter will also have to be correct for the combo, but you can fly on a 28x10.5 tire, and still run the proper gear to pull hard through the finish line. Paul
Posted via Mobile Device

heads up. my combo ended up being a 512 with a pro shot fogger on bottom and sportsman up top, th400 with brake custom, bte custom nos converter and still running a 12 bolt 35 spline axles full spool and 390 gear.

[hotrod 80]

Originally Posted by bigboybodry

heads up. my combo ended up being a 512 with a pro shot fogger on bottom and sportsman up top, th400 with brake custom, bte custom nos converter and still running a 12 bolt 35 spline axles full spool and 390 gear.

The 2.48 over the 3.90 is alot of mechanical advantage . Did they specify 28" or just say true 10.5 ? If just a true run a 29.5 . I would test with the 3.90 , but your on the right track . I came up with 3.40 with a 28 " tire and 400 . I had a 3.60 in the garage , so i'll probably be heading that direction .

X2 on the ignition box and pulling timing .

[bigboybodry]

Originally Posted by hotrod 80

The 2.48 over the 3.90 is alot of mechanical advantage . Did they specify 28" or just say true 10.5 ? If just a true run a 29.5 . I would test with the 3.90 , but your on the right track . I came up with 3.40 with a 28 " tire and 400 . I had a 3.60 in the garage , so i'll probably be heading that direction .

X2 on the ignition box and pulling timing .

they said max 28x10.5 no w's