1958 F600 HP rating
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Trailering
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1958 F600 HP rating
Hey all. Trying to figure out what engine we have. Truck is a 58F600, It has a 2bbl Y block installed. The data tag says NET 136hp@3600rpm, which is less than what the 6 cylinder was rated at for 58. Is this engine the same as the 205hp@4500rpm GROSS rated engine listed every where else?
I did the math, and the 205hp version seems to correlate with reality. 78% VE at 2400 results in 295ft/lbs, 78%VE@4500 results in 205hp. To get to the 136hp rating on the placard, VE drops down to 60%. Even flatheads could rival that VE. Is the 136hp PTO hp at 3600 rpm for some kind of farm implement rating? It doesn't line up with any Y block I can find listed. Or maybe this truck had an engine swap in the stack of decades its been rolling around and the data plate is for a 6 cylinder?
I know the gross vs net debacle of that era was all over the place. Everything from crank hp in a cold dyno cell with tuned headers to dyno at the transmission tailshaft with full actual exhaust and all accessories installed and operating(i think this was much later than 58 though)
I did the math, and the 205hp version seems to correlate with reality. 78% VE at 2400 results in 295ft/lbs, 78%VE@4500 results in 205hp. To get to the 136hp rating on the placard, VE drops down to 60%. Even flatheads could rival that VE. Is the 136hp PTO hp at 3600 rpm for some kind of farm implement rating? It doesn't line up with any Y block I can find listed. Or maybe this truck had an engine swap in the stack of decades its been rolling around and the data plate is for a 6 cylinder?
I know the gross vs net debacle of that era was all over the place. Everything from crank hp in a cold dyno cell with tuned headers to dyno at the transmission tailshaft with full actual exhaust and all accessories installed and operating(i think this was much later than 58 though)
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When I decoded your truck:
https://www.ford-trucks.com/forums/1...l#post21158246
The warranty tag shows a 292 4V HD engine, but the numbers on the tag do not agree with the MPC figures for the HP.
Since there's a good chance your engine was changed, nothing on the warranty tag matters.
The plate isn't for a six as the 292 HD is indicated.
As I told you before, no engine shows those numbers in the '57-'63 MPC.
It's a typo or other mistake.
As to doing the math on volumetric efficiency, you're way off. "Certified Net HP" is an SAE standard for trucks to measure the net HP as the engine is installed in the vehicle--air cleaner, stock exhaust etc etc. You could search it out for the specific test proceedures, but it will not lead you to an answer about the numbers on your warranty plate.
The Net vs. gross was most visible in '72 for passenger cars and light trucks. Everyone blames the smog equipment, but some engines had no changes year to year and the numbers dropped like rocks anyway.
Many of the HP numbers were pulled out the air by marketing people who wanted something that would catch the eye of the buyer.
https://www.ford-trucks.com/forums/1...l#post21158246
The warranty tag shows a 292 4V HD engine, but the numbers on the tag do not agree with the MPC figures for the HP.
Since there's a good chance your engine was changed, nothing on the warranty tag matters.
The plate isn't for a six as the 292 HD is indicated.
As I told you before, no engine shows those numbers in the '57-'63 MPC.
It's a typo or other mistake.
As to doing the math on volumetric efficiency, you're way off. "Certified Net HP" is an SAE standard for trucks to measure the net HP as the engine is installed in the vehicle--air cleaner, stock exhaust etc etc. You could search it out for the specific test proceedures, but it will not lead you to an answer about the numbers on your warranty plate.
The Net vs. gross was most visible in '72 for passenger cars and light trucks. Everyone blames the smog equipment, but some engines had no changes year to year and the numbers dropped like rocks anyway.
Many of the HP numbers were pulled out the air by marketing people who wanted something that would catch the eye of the buyer.
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