Dyno Test
 

Hey Guys I purchased a 2002 Volvo with a Series 60 Detroit last week, and of course thanks to this valuable forum before I bought it, I had a dyno test
run and here were the results...


443 Hp @ 1520, Engine Load 100%, 1520Ft Torque, Pre EGR Boost 29PSI

Coolant Temp 194F, Oil Pressure 50 PSI, CCP In H20 1.4

The engine is rated at 435/470 Hp. The Tech seemed surprised at the readings. He said the Hp numbers were really strong for this engine.. I was wondering what some of the numbers mean???? are the Horsepower ratings to the wheels?? and if so, what percent drop do you expect from the engine to the wheels......Thanks for your help


Chris

Re: Dyno Test
 

15% drop. it's probably tweaked... did the exhaust manifold glow red when she was loaded ?

Thanx for the reply... I wasn't there when they ran the test so I
didn't see the manifold.

The Mechanic that ran the test wrote this "Crank Case -3.5 In. Water"
does anyone know what that means??...I know, its true im a NOOB!! :oops:

Thanks again for your replies, this forum has been a BIG help.



....Chris....

The inches of water is a pressure measurement. So the -3.5 would be negative crankcase pressure (Running in a vacuum).

-3.5 in hg = -1.72 psi
-3.5 in h2o = -.13 psi (Thank you for correcting me bob h)

careful with your math; in. of hg (mercury), and in. of water (h20) are 2 different things... 1.7 psi of base pressure is a severe blow-by condition, 0.13 psi is not


negative (-) base pressure is not possible, it was probably a dash

Thank you for correcting my math. But you are mistaken with your opinion about negative crank case pressure. The fact is it is possible.

under what conditions would you expect to measure crankcase vaccuum?

1. a closed crankcase ventilation system, like you might see on a gas engine (or, an '07 diesel) places the crankcase under a vaccuum whenever the pcv valve is pulled open by low (negative) intake manifold pressure

2. this system MUST be disabled during a crankcase pressure test... for obvious reasons

3. this post is in reference to an '02 series 60 with an open crankcase

...again, negative pressure readings are impossible

Thanks for the replies; I really appreciate your responses.

So is there any thing I need to look out for?? The funny thing is the computer was supposed to print it out on the paper! But the print out failed... so he just wrote it on the paper