what is the rpm calculator??

[sapper]

i used it before but forgot what all your supose to add or multiply. im trying to figure out what i can get for crawl ratios and highway rpms with defferent setups ie something like a 700r4 with a doubler and 4:88s and what the diff would be with other gears. thanks!! /forums/images/icons/wink.gif

 

[Blazer_Boy]

Just multiply everything. My '82 w/ 700R4, NP208, and 3.73s would be...... 3.06 x 2.61 x 3.73

A torque convertor makes things a little higher too.