If i get my truck dyno'ed on a "Mustang Dynamometer" and it says that my HP is 376.0 and my Torque is 458.8, what is my RWHP ? ? ?

I dont no how these dynos work??

 

That is your Rear Wheel HorsePower and torque.

 

You got 376 rear wheel horsepower (RWHP). What mods do you have?

 

The Mustang dyno's show lower horsepower when compared to a Dynojet. The Mustangs place a load on the vehicle while on the rollers. I dont know what the correction offset is, maybe 15-20%. REM should know.

 

My mods are

4lb pulley
REM Air intake
Ported plenum
Ported T/B
Magnaflow muffler with 2 cats cut off

 

I'm guessing you got Dyno'd at REM's shop..............When I had my truck dyno'd there, with the exact same mods you have (except K&N filter with open airbox instead of open air filter), I was around 365 RWHP, but 490 RWTQ...........Basically, if you wanted to know what you would get on a dynojet, add about 12% to your current #'s on HP..........your torque numbers will be the same.

Your tune is a little different than mine as can be represented by the numbers...........You can always have Paul play with the parameters and see what you like better...........I personally preferred to have the higher torque numbers.

JC

 

so if i add 12% to 376 that would be about 420RWHP...I dont think i have 420 RWHP...that seems way off for my mods...???

 

The 12% is a rule of thumb........There is no exact formula, although Ed Zerbe from the SVTOA came up with the closest one I've seen to date...............run a search over on the fla svt site, for which I can't write the link here, but I'm sure you know where it is.

And dont' be so sure YOU DON'T have that type of power on your truck...................It is possible..............Some have put down that type of power with only a 4#'er..............like I said B4, it's all in the tune.

Hey, you were at the Mustang Roundup Show a couple weeks ago weren't you......................I had the red Mach 1 a couple of spots down from you...............I didn't get to meet you, but I love the flame job on your truck

JC

 

I had 430hp on a Mustang Dyno wit ha 2lb pulley (and lots of other stuff)

Your numbers sound right on.

Coldie

 

It's only about 5 to 10% on average, if even that, depending on the dyno.

 

Paul will be able to answer this one.

A few weeks ago I saw someone posting either here or at nloc about this. And the number they used was 9%. (based on much experience)

WOT