Lynn D. Brown
New member
Believe it or not, but I actually skimmed thru the directions that came w my 140 A Powermaster Alt. And I'm sorry to inform U guys that R going all out. But they have a Warning that their unit is not to be run above 18,000 RPM.
Guess that ruins my plans for running my engine at 20 K.
Wait a minute, I just reread it since it didn't make sense. I guess U have to divide that by the Pulley ratio. I'll go out and measure that - it looks to be ~ 2.1" on the Alt. pulley and 7.56" on the crank. So that would make the ratio ~ 3.6. So, then I guess we shouldn't be running it over 4998, say 5000 RPM ?
That seems kinda ridiculous - weren't our car designed to run 5500 RPM Max ? And I'm sure that alot of our guys want to run ~ 6000 RPM. In fact, I was hoping to run that. So then we R supposed to change out one of the pulleys ? So then I would need to raise the Alt pulley to ~ 2.27", say 2¼" ?
I wonder if our stock Alts have a similar RPM limit ? I'll give them a call.
Guess that ruins my plans for running my engine at 20 K.
Wait a minute, I just reread it since it didn't make sense. I guess U have to divide that by the Pulley ratio. I'll go out and measure that - it looks to be ~ 2.1" on the Alt. pulley and 7.56" on the crank. So that would make the ratio ~ 3.6. So, then I guess we shouldn't be running it over 4998, say 5000 RPM ?
That seems kinda ridiculous - weren't our car designed to run 5500 RPM Max ? And I'm sure that alot of our guys want to run ~ 6000 RPM. In fact, I was hoping to run that. So then we R supposed to change out one of the pulleys ? So then I would need to raise the Alt pulley to ~ 2.27", say 2¼" ?
I wonder if our stock Alts have a similar RPM limit ? I'll give them a call.
