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View Full Version : RPM/SPEED/BOOST of our 8V, 1992 500 HP



Coloradobus
11-25-2011, 08:40 AM
According to our buildsheet our coach has a 3.58 rear gear ratio.


These speeds were judged from the GPS, not the Speedo. The only Speedo reading that was same as GPS was at 70 mph. The rest were 2-3 miles slower.

Here's the poop from our test run out on the plains east of Denver with little wind.
1ST gear topped out at 2500 RPM at 28 mph
2nd gear topped out at 2500 RPM at 39 mph
3rd gear topped out at 2500 RPM at 50 mph
4th gear topped out at 2500 RPM at 62 mph
5th gear Topped out at 2480 RPM at 78 mph

At 60 mph at 1950 RMM Boost was 5
At 65 mph at 2075 RPM Boost was 6
At 70 mph 2220 RPM Boost was 7
At 75 mph 2390 RPM Boost was 9-10 a little wind/hill
At 76 mph 2420RPM topped out Boost was