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I was wondering, what is 1 dyno hp compared to real rear wheel hp?
I know there is different transmission, tyre and rear ends ec, but still is the a guide line, for "normal" street fighter cars?
Not sure I fully understand your question, but there are far too many variables for a simple or accurate answer.
Dynojet vs. Mustang dynos will give the same car different results. I would guess that Lab (engine) Dynos also vary in results from one brand to another.
A 400hp (gross) engine installed in a no option Corvette with only the water pump, alternator and a 4spd will give better RWHP results than the same 400hp engine installed in a highly optioned Corvette (PS, AC, A.I.R., Automatic).
I dynoed both my engine before and after rebuild and I also dynoed the chassis before and after the engine rebuild. I used the same engine and chassis dynos for both results.
285hp (gross) / 217 rwhp, a 23.85% loss
341hp (gross) / 245 rwhp, a 28.15% loss
You'll notice the weaker engine had less performance loss (23%) between gross and rwhp. That's because the standard Corvette exhaust can only flow X amount of air. The new stronger engine was capable of pushing more air, so the very same exhaust created a larger performance loss (28%). Had I installed a 600hp (gross) engine, the performance loss would have been even larger.
If I added headers after the rebuild, my performance loss would have been less. The variables are endless.
I'm curious to see this. Mostly to see the side by side with DDawson within actual and inputted. I'm sure there would be other contributing factors such as elevation, humidity and all but I want to see how close it is.
Also I don't have a dyno anywhere near my town and I have a similar build to DDawson.
If there's time, throw my numbers in there only if you have a chance please
I will try, can you tell me the manufactor part number for the cam and the heads?
Originally Posted by Ryan Menzies
I'm curious to see this. Mostly to see the side by side with DDawson within actual and inputted. I'm sure there would be other contributing factors such as elevation, humidity and all but I want to see how close it is.
Also I don't have a dyno anywhere near my town and I have a similar build to DDawson.
If there's time, throw my numbers in there only if you have a chance please
My LS3 with 495hp/478tq advertised at crank just put down 409hp/400tq on dyno. A lot of factors to consider as you pointed out, but mine ran through a t56 Magnum and a HD clutch which certainly added a little more to the loss.
Dyno hp -v- real hp
