Well what'd'ya know. I cleaned out my closet last weekend, and what popped out but a scanner.



This was done at around 80 deg in Tempe, AZ (not high altitude).

 

ACoder,
Do not let that dyno reading let you down,there is no way that is correct unless your truck was running on 7 cylinders!There has been alot of bad dyno posts lately that are giving dyno readings a bad name.There must be alot of people dynoing vehicles that are not doing it the correct way therefore getting false readings as in your case!I saw several 01's that had been dynoed at 400 HP and 500 pounds of torque and can only run 13.30's at the track,if they were really making that kind of power they would be running mid to high 12's all day long even in 90 degree heat!Go fiqure!!Take your L to the track and see what it turns that should give you an idea,if its in the 80's out there you should be running 13.70's to 13.90's stock in that heat!

Matt

 

80's? Try a buck-ten!

 

As an aside, what the hell is this about the HP and torque always meeting at 5400 RPM?

Didn't I read that somewhere?

Someone said it's a law of physics, but I'll be damned if I can figure that one out.

I don't believe it, personally, but it seems to be the case, nonetheless.

 

Mine met at 3700.


------------------
The truck:
Teal 1997 XLT flareside with 4.6L, auto tranny, electronic shift on the fly, 3.55LS and 4x4 ORP.

Performance mods:
Gen. 2 K&N FIPK
Superchip(removed until further notice)
True dual exhaust exiting out the back
2.5" pipe with 18" glasspacks and 18"x4" round chrome slash cut tips

Appearance:
White face gauges
Euro clear corners
01L headlights
Covercraft tonneau cover
Billet pedals
16" Modern© wheels
265/75r16 Wild Country Radial TXR tires
Factory tinted rear windows
Bug deflector
Euro clear corners

Sound system:
Clarion ADX5655z Double Din Cassette & CD
4 Pioneer TS-A6865 speakers

Other:
Bedliner
Bulldog keyless entry/remote start

n6260k@cs.com



<A HREF="http://www.f150world.com/v8speeddemon" TARGET=_blank> </A>

[This message has been edited by King James (edited 06-12-2001).]

 

I am sure someone here knows the details better than I but here goes. The Dyno measures torque and calculates Horsepower from the torque reading, which is why the lines should cross at the same point

Next ?

Doug

 

5252 RPM

------------------
Red '00 Lightning,
Power Surge Performance enhanced,
375 RWHP,
445 RWTQ,
12.974@104.818
Track Videos

 

Silver: What?! So there's some function such that you plug in torque and you can determine HP?

Looking at the graphs, it's difficult to guess what that function might be.

Don't make me come over there.

 

EASY, the definition of Watt's horsepower is:

HP = Pound-Feet per Minute/33,000

so

HP = (Torque*2*pi*RPM)/33,000

work through the constants and you get:

HP = (Torque*RPM)/5250

so by definition:

(Torque*RPM)/HP = 5250

and when HP = Torque, RPM = 5250

------------------
Joel.......
99.5 White Lightning,
SVT # 0056

 

JoeLightning: You smart sumgun.

But why didn't King James' cross at 5250?

 

They did (if he rev'd that high). If you look at the left and right vertical (Y) axis, the scale for HP and Torque are different. If you look at the HP and Torque values at 5250 rpm (which you can't because the run was cut short), they would be the same.

 

Here is a dyno form another 01. Me and a few other guys from Washington and Oregon got together one day to do dynos. This is from the only 01 there. Looks like he let off the gas at 5600.


[This message has been edited by King James (edited 06-12-2001).]

 

If mine crossed at 3700 how are they going to cross again?

 

King James.

.... and at 5250RPM, the torque and HP values look to be about 325~330.

 

The point you are missing is that the HP and torque VALUES are the same at 5250RPM. Where they cross is a result of the HP and torque scales. If the scales are the same, they cross at 5250.

[This message has been edited by JoeLightning (edited 06-12-2001).]