|
ABAD72 Jul 26th, 07, 9:35 PM got th 350 tranny,, 373 rear with 235/70 15 rear ties,,,,,can soembody pleasse calculate my RPM at 70mph and 55mph. thanks http://i192.photobucket.com/albums/z135/abad72/picscarszoo050.jpg fishhead Jul 26th, 07, 10:07 PM Thats really kind of hard. There are allot of factors that cause your R.P.M. to be what they are. What is your problem? Gary Anderson Jul 26th, 07, 10:27 PM @2500 at 55 @3200 at 70 Jerry70 Jul 26th, 07, 10:32 PM The calculator I used said 2472 @ 55 and 3147 @ 70 but your actual rpm is likely a little higher due to converter slip. Jimmyhotrod Jul 26th, 07, 11:46 PM mph x gear ratio x trans ratio x 336 ÷ Tire Diameter = RPM Tire Diameter Example: 70 mph x 3.73 (gear ratio) x .67 (trans ratio) x 336 ÷ 27(tire diameter) = 2176RPM 70 mph with a 3.73 ring and pinion over drive transmission in 4th gear with a 27" tire will perform at 2176 RPM Chevy 70 SS vert Jul 27th, 07, 12:44 AM Lots of calculators out on the internet. Here's one: http://www.csgnetwork.com/multirpmcalc.html | ||