Posted by Dean on November 06, 2012 at 08:12:16 from (67.172.15.77):
In Reply to: Re: True Horse Power posted by MarkB_MI on November 06, 2012 at 07:53:51:
Bingo!
I learned this lesson from my father when I was about 17 or 18. At the time I had a 1964 Impala SS with the 327/300 (SAE gross), which, by the way, was underrated and quite competitive with the run of the mill 389 tri power GTO of the day.
My father was an engineer for GMC Truck and Coach and a Detroit Diesel expert. I was learning about fuel injection, roller cams, blowers, etc., at the time, all of which were incorporated into the Detroits. Curious, I asked my father how much HP the 426 CI 6/6V 71 Detroit made. He told me that, depending upon configuration and options, around 180 net crankshaft HP as configured for transit bus (hydramatic) applications.
I was stunned and asked how my carbureted 327 V8 engine could make well over 100 HP more without FI, roller cams, blower, etc. Well, he said, your car engine might make 300 HP at 5,000 RPM+ for a short time but the Detroit will make its 180 HP at 1800 RPM 24 hours each day, seven days each week, indefinitely, stopping only for routine maintenance.
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