Fun2Day

I have a dyno chart that says I have Max power of 323.1 and Max Torque of 349.1.

The engine is a 2001 LS1 350 Horsepower

What does this dyno mean and how many horse power do I have? Rear wheel and crank. Also how did you figure it.

Thanks for your help.

madmatt9471

This means you have this at the Rear Wheel - you look like you have a few mods done to go along with the tuning on your Vette so: A simple calculation will help you out to find you HP @ the Crank -

Here you go: and this is better than the 15% loss for MN6 and 20% loss for A4

For a MN6 you take your RWHP and Divide it by .86 (Do this for the RWTQ too)

For a A4 you take your RWHP and Divide it by .82 (Do this for the RWTQ too)

This will give you you HP and TQ @ the Crank!

So you actually have: the reason for the higher numbers @ the Crank for the A4's over the Manuals is that it takes more HP to make the same RWHP pushing it through a Automatic - basically you loose more HP and TQ through a Automatic

So "IF" you have a:

MN6 = 375.69 HP @ the Crank
MN6 = 405.93 TQ @ the Crank

A4 = 394.02 HP @ the Crank
A4 = 425.73 HP @ the Crank

Thanks,Matt
661-406-7516

ZZ06

thats good info right there. puts a smile on my face

madmatt9471

Do you have your Dyno sheet we can look at?

Can you take a pic of it and post it?

I am curious to see it too!

Thanks,Matt

madmatt9471

It is the best formula - way better than the loss factor of 20% for A4's and 15% manuals!

Thanks,Matt

WKMCD

Sounds like this may be an A4 car. The higher RWT could be converter flashing which will inflate the RWT reading.

Just my $02

Fun2Day

how do i download my scanned dyno?

chaase

A4's have 15 ft-lbs lower torque from the factor by default so I would suspect it is a manual.

lionelhutz

As given, the numbers really don't mean anything.

You didn't even post if it was a chassis dyno or an engine dyno.

WKMCD

Locked - I would agree.

Fun2Day

what do you mean?

Fun2Day

Yes it is a manual transmission

WKMCD

Post the chart

gsxnut

Fun2Day,

A couple questions.

1. Was the dyno test done while the engine was out of the car on an engine stand (engine dyno) or was the dyno test done where you drive your car up and then place it on a piece of equipment which is called a chassis dyno? If the test results you have are done on an engine dyno the measurement is taken at the crank. If it is done on a chassis dyno the measurement is taken at the rear wheels. Some power is used to operate the drivetrain so the measurment taken at the wheels will be less than the measurement taken at the engine. The calculation above provide a ways to calaculate the power at the engine from a chassis dyno measurement.

2. What do the numbers mean? The numbers you provided are the peak output of the engine over a range or RPM. Typically on a dyno test the engine is put under a load and then tested for a particular RPM range. The typical range is 2000rpm to 6500rpm. The test measures the amount of power (HP) and Torque (ft-lbs) the engine is producing. A graph is provided that shows how much power and torque the engine is producing across the RPM range.

The test basically give you the power characteristics of your specific motor. The peak numbers tell you what the maximum HP an Torque of the engine is over the range tested.

Hope that helps,

Mark

gsxnut

To answer the second part of your question. Your car makes 323.1 peak HP and 349.1 peak ft-lbs of torque over the range the dyno test was performed. Depending on the type of dyno used the engine is put under a known load and then collected data is run through a mathmatical calculation to provide a results. If you are a math geak and want to know more check out.

http://www.ajdesigner.com/phphorsepo..._factor_cf.php

If you are not overly interested in the math behind the number than know that the dyno program calculates the numbers and there is no addition calculation you need to do. The number provided in the result is the amount of power your engine is making.

Mark

gsxnut

Another question you may have is why does my 350HP motor only make 323.1 HP?

1. The 350HP motor is the rating that factory gave to the motor when they used a test case. Eventhough every motor has the same parts in them due to manufacturing tolerances the output of the motors will vary. Not every motor makes exactly what the factory rating is.
2. If the car has had modifications made to the motor it will alter the power.
3. The age and milage on a car will alter the power. As the motor gets more mileage and wear it will typically reduce the amount of power for a whole host or reasons like the injectors start to get build-up and don't flow as good as they did when they were knew.
4. The conditions the day the car was run including tempurature, humidity, elevations, octane of the fuel etc. These all have an affect on the engine. If the engine was heat soaked when the ran the test it may not perform as well. There are adjustments for these conditions in the calculation but each car reacts differently to these types of conditions.

Mark

Fun2Day

This was done on a chassis dyno.
Black wing
enlarged throttle body
corsa exchaust sytem with an x pipe

then tuned to these numbers