Calculating Instantaneous Net Power

[dbaxter_ss]

Something I think you guys forgot about to get an accurate HP reading is the amount of gas your car has. Without that your kinda robbing yourself of hp.

Adding in the gm.fuelrem pid to the formula * 6.350 ( weight of 1 gallon of premium gas ). Sorry metric guys I didn't lookup that weight.

So you need car weight, you and the amount of gas your car has: Since the car does somewhat accurately keep the amount you can get this by adding the gm pid.

HP = (((3554+({GM.FUELREM}*6.350)+195)*{SAE.VSS.mph})*d x({SAE.VSS.mph},12))/8226.63

compared to without
hp = (((3554+195)*{SAE.VSS.mph})*dx({SAE.VSS.mph},12))/8226.63

I would assume this would closely relate to a mustang dyno, so to get dynojet numbers /.9 ( mustang is 10% lower then a dynojet but supposed to be more real world load ) then /.85 drive train loss.

So in mine below.
381 /.9 = 424.2
423/3 /.85 = 499 fwhp ( AHHH SO CLOSE to 500 )

[dbaxter_ss]

Since I was bored, I figured I would just put down the HP, then the HP formula like I put above but put down all 3 change offset of 6, 10 and 12.

From waht I can see 10 and 12 dont make a much of a difference although over the given one and at 6 it makes a big difference.

[joecar]

That's very true, accurate mass is critical to the accurate calculation of HP.
8)

[joecar]

Quite impressive: You're spinning to 6900 RPM...!! 8) 8) 8) 8) 8) 8)

Edit: corrected spelling of "RPM", oooopsy.... :oops:

[dbaxter_ss]

The rev limiters are set to 7000. On that run it hit 7003

I am happy with that run more because it was climbing in HP up to 6900.

[Blacky]

Tips and tricks:

I know you are probably only displaying a temporary chart config to illustrate your point, but...

In the chart properties, try checking the "Split units" checkbox for each series. That way the "HP" will appear on it's own line and (depending on the height of the chart) long captions may become a little larger and easier to see.

Regards
Paul

[dbaxter_ss]

Kewl will try that next time Today was better anyway with .25 less saturday and .1 less wot today kicked her up from the 380 to 393

[joecar]

How close is this calculated power curve to what the dyno says...?

[dbaxter_ss]

Ha, to be honest I haven't been to a dyno with the SS in a while, most of the time I have been going with the GTO.

[joecar]

Derrick,
How many seconds does your SS take to go from 43 to 83 MPH on the chart that you posted here...?
What about on the street 0..60 MPH...?
I wasn't paying attention, does your SS have M6 or A4..?
Joe 8)