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Old 11-18-2011, 08:39 PM
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Dyno sheet...

Here's the dyno sheet for My 383sbc w/ 6-71 blower.
Crazzzzy hp for My '32 coupe.{almost 615 hp}
How do the #'s look?
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Old 11-18-2011, 09:36 PM
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That's pretty stout!!! If you can get it hooked to the ground it will be barnburner.

Keep us updated.
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Old 11-18-2011, 10:21 PM
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Looks nice, but do you have one with the RPM line on the bottom?
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Old 11-18-2011, 10:31 PM
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That chart is B.S. Horsepower and torque ALWAYS intersect at 5250 rpm. This shows it at about 4750.
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Old 11-18-2011, 10:33 PM
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RPM is green line, looks like test was run between 4K and about 6225 RPM.

Now, why the TQ and HP didn't cross until about 5600 RPM instead of 5250 RPM I couldn't say...
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Old 11-18-2011, 10:46 PM
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According to what is printed on the chart, blue is torque and red is horsepower. Those lines intersect at about 4750 rpm.
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Old 11-18-2011, 11:08 PM
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Nah. Look again.
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Old 11-18-2011, 11:13 PM
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I'll stick by what I said. Maybe you need to take a second look, sir!
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Old 11-18-2011, 11:17 PM
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Sir??

Anyway, RPM is the far right vertical line marked "All Other Lines". The horizontal line across the bottom is "Run Time (Sec)" only.

Otherwise, using the bottom horizontal Run Time line (the only place I see where you could get your numbers from), it's making 430 HP/560 TQ at 0 RPM and the peak power would be at about 8700 RPM. The peak's stated to be at 6226 RPM...

MAIN point is, the lines do not cross at 5250.

Last edited by cobalt327; 11-18-2011 at 11:38 PM. Reason: Correct peak RPM.
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Old 11-19-2011, 08:10 AM
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Yeah, would be nice to see it though in a conventional format, starting from a lower RPM. Don't get me wrong, nice numbers! But if it were me, I'd like to see some in the RPM ranges I use 90% of the time .
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Old 11-19-2011, 08:55 AM
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Quote:
Originally Posted by Siggy_Freud
Yeah, would be nice to see it though in a conventional format, starting from a lower RPM. Don't get me wrong, nice numbers! But if it were me, I'd like to see some in the RPM ranges I use 90% of the time .

I will look into that and ask the engine builder!!!
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Old 11-19-2011, 12:00 PM
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Quote:
Originally Posted by cobalt327
Sir??

Anyway, RPM is the far right vertical line marked "All Other Lines". The horizontal line across the bottom is "Run Time (Sec)" only.

Otherwise, using the bottom horizontal Run Time line (the only place I see where you could get your numbers from), it's making 430 HP/560 TQ at 0 RPM and the peak power would be at about 8700 RPM. The peak's stated to be at 6226 RPM...

MAIN point is, the lines do not cross at 5250.
You are correct! I was reading it like it was a normal graph with the RPMs across the bottom. Anyway, it's hokey.
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Old 11-19-2011, 12:37 PM
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I agree w/you.
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Old 11-19-2011, 12:56 PM
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Quote:
Originally Posted by WDCreech
You are correct! I was reading it like it was a normal graph with the RPMs across the bottom. Anyway, it's hokey.

So what do You want Me to ask the Guy Who I bought the engine from when I call Him Monday morning????
Let Me know "exactly" so He can give Me answers to Your negative feelings about His dyno sheet.
I bought it from Big Al's toy box,,,,do You think He's a scam artist???????
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Old 11-19-2011, 01:11 PM
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Quote:
Originally Posted by 1bad32
So what do You want Me to ask the Guy Who I bought the engine from when I call Him Monday morning????
Let Me know "exactly" so He can give Me answers to Your negative feelings about His dyno sheet.
I bought it from Big Al's toy box,,,,do You think He's a scam artist???????
It may be something that is easily explained, and I don't think he's necessarily scamming you, but the question I would have is:

1. Why don't the torque and HP lines cross at 5250 RPM like every other dyno graph? (The formula for HP is TQ x HP divided by 5250. All this means is the lines cross at 5250 RPM)

2. Can a dyno sheet be supplied that has the power from the lowest RPM the engine will pull from, up to max power or redline, with the graph showing RPM across the bottom? (The lowest RPM is usually around 2000-3000 up to where the power falls off or the redline is reached)

EXAMPLES:





The printout can be configured in many different ways. The configurations in the examples above are the more common ones used (they both show TWO pulls on the same graph).

They show the full power curve with HP, TQ, and RPM. Simple and easy to read.
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