New Vortech supercharged dyno sheet posted....
06-25-2002, 06:06 AM
#11
Jimbo and Mack430 - could you clarify why you both think this is bogus? The SC numbers cross at about 5300 and the NA numbers cross at 5350 - not perfect but pretty close. If you do the math at any point the HP is pretty close. Yes the numbers are low but that is (probably) more due to the equipment. It's also possible that they tested in 5th gear which would drive down the torque numbers.
If you scale the % increase, as Rasputing said, you're looking at well over 300 RWHP - pretty damn good!
If you scale the % increase, as Rasputing said, you're looking at well over 300 RWHP - pretty damn good!
06-25-2002, 06:33 AM
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Originally posted by infinitebass
Not that you can scale it and validly claim that its what they meant....
Blake
Not that you can scale it and validly claim that its what they meant....
Blake
06-25-2002, 07:14 AM
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KAMcDonald says that Mustangs read 20-30hp lower than Dynojets. He doesn't say "20% lower" or "25% lower", he gives a constant offset value.
1) This still only gets us to 175-185hp, still way below normal stock values.
2) If you have a constant offset (20-30hp) then you can't just scale everything up. You can add the offset to the SC dyno graph, if you really want...but if the manufacturer gives a dyno chart showing 260hp, you can believe that you won't get more than 260hp, IMHO.
This reminds me of that bogus Aussie site that got 30% power gains, which brought the car from 150hp to 195hp.
Tanq
1) This still only gets us to 175-185hp, still way below normal stock values.
2) If you have a constant offset (20-30hp) then you can't just scale everything up. You can add the offset to the SC dyno graph, if you really want...but if the manufacturer gives a dyno chart showing 260hp, you can believe that you won't get more than 260hp, IMHO.
This reminds me of that bogus Aussie site that got 30% power gains, which brought the car from 150hp to 195hp.
Tanq
06-25-2002, 07:22 AM
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These Mustang dynos can be far off from a Dynojet. I have personally seen a '02 Z06 make 291 RWHP on a Mustang dyno....that over 100 hp less than the factory rates the car at the flywheel...What does the typical S2000 make at the wheels on a Dynojet???
06-25-2002, 08:23 AM
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Guys, there is nothing strange at all about the shape of the stock curves (pink, light blue) in this graph!
The only thing that is odd is the Y-scale numbering. Overlay a dynojet plot on the stock curve and it is more or less identical! Wes, exactly what power loss are you referring to? Neglect the numbers on the Y-scale and just compare stock curve against supercharged curve.
However that is easily explained by the fact that the MD-250 is a loading dyno vs. the more ubiquitous dynojet inertial dyno. To subtract numbers like 20 or 30 hp, or even apply some universal percentage, is naive. That is why you have to reference the stock dyno.
When the vortech SC goes on a Dynojet 248 or similar with SAE corrections, I won't be suprised at all to see peak HP of 330HP +/- 10.
The only thing that is odd is the Y-scale numbering. Overlay a dynojet plot on the stock curve and it is more or less identical! Wes, exactly what power loss are you referring to? Neglect the numbers on the Y-scale and just compare stock curve against supercharged curve.
However that is easily explained by the fact that the MD-250 is a loading dyno vs. the more ubiquitous dynojet inertial dyno. To subtract numbers like 20 or 30 hp, or even apply some universal percentage, is naive. That is why you have to reference the stock dyno.
When the vortech SC goes on a Dynojet 248 or similar with SAE corrections, I won't be suprised at all to see peak HP of 330HP +/- 10.