Re: [ihc] RPM, Gearing formula needed

["Allan Ericson" <lowvolt@xxxxxxxxxxxx>]

Try the RPM wizard on the binderbulletin. Calculate at 60 and multiply times
1.333

http://www.binderbulletin.org/techlib/wizards/rpmwiz.asp


----- Original Message ----- 
From: "ROCKY LEAR" <rockylear@domain.elided>
To: <ihc-digest@domain.elided>
Sent: Monday, September 08, 2003 4:06 PM
Subject: [ihc] RPM, Gearing formula needed


> I am trying to figure out my gearing questions. Maybe someone here can
help. I know that there used to be a formula for calculating oversized tires
that used to be in some of the 4x4 mags but darn if I can find it now. I
want a truck that will run 80 mph without too much winding. Here is what I
have:
>
> Two gearing options I have are 4:88 and 6:17
>
> 44" tall tires, actual measurement may be closer to 45"
>
> An OD out of a 71 t-all...what is that model number any way? T34?
>
> Is there any way to determine what my RPM will be at 80 mph in OD?
>
> I am simply guessing from past experience that the tires alone will put
the 4.88's in the equivalent of a 3.50-3.70 range.
>
> Is ther any way to figure out this?
>
> A free 6 pack of your choice to anyone who can give me definite answers!
>
> Rocky