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#1
05-17-2005, 11:31 AM
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Top End RPMs
I have a 2002 ProStar 209 Sammy with the LTR engine. Just took it in for the Spring Tune/Clean. Before the service, last weekend, I was running around 4900 RPM top end with a speed around 50 MPH. Now after the service I am running around 4700 RPM with the top end speed still at 50 MPH.
Does this make sense? Why would my RPMs go down and speed stay the same? Thanks for any input.
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2002 ProStar 209 Sammy Duvall 330 HP 133 hours (that's funny...) Last edited by sten76; 05-17-2005 at 01:37 PM. 
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#2
05-17-2005, 12:01 PM
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Not to me, 200 RPM's isn't much, but I would call the service manager and see what he says.
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#3
05-17-2005, 12:30 PM
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What are you using to check your speed with?
If it is the speedos, the calibration could have changed on them. They also are inaccurate above 39 mph. If it is with the Perfect Pass or GPS, I got nothing. Leroy has the best idea, call the manager and find out what new fangled gas saving device he installed. 
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2003 ProStar 209, 2 flags, 8 cup holders
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#4
05-17-2005, 01:25 PM
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I'm not at all familiar with the LT-1, but every 350/351 motor I've driven, in boats or cars, usually topped out at 4500-4600 rpms... 4900 seems high to me. Maybe the tach isn't all that accurate as well?
Let us know what you find out.
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Scott FitzGerald 1984 Stars & Stripes w/454
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