Moderators: Greenleaf, BC847, Richie O
cmann250 wrote:Let me run this by you all. My dyno graph is plotted against mph instead of rpm.
The background information: 235/85/R16 tires (99.59" circumference), .69 O/D, 3.07 rears, and I'm arbitrarily saying the converter is 89% efficient .
The equations: (miles/hour)*(5280ft/mile)*(12in/ft)*(1rev/99.59in)*(1hr/60min)= wheel rpm
(wheel rpm)*(rear end ratio)*(O/D ratio)/(converter efficiency)=engine rpms
At 60 mph that's about 1515 rpm and every 20 mph is another 500 rpm.
Reasonable? By that math, 120 mph is right at 3000 rpm.
DMan1198 wrote:That's why I started clicking the unread posts button
Philip wrote:Caleb
The first time my truck was on a dyno. I forgot to tell the guy to lockout OD. He did the first pull in OD. He almost fainted when the guy on the computer told him he spun the rollers at 132 MPH.![]()
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