Dyno's
#1
11-23-2006, 06:45 PM
Dyno's
I have seen G-man write that you can get a decent truck for about 20 grand and some with rebuilds, and I have been checking and he is right. I know not to buy a truck without getting a dyno, my question being! What exactly does a dyno tell me?
#3
11-24-2006, 12:57 PM
Re: Dyno's
Originally Posted by jiptwoo
I have seen G-man write that you can get a decent truck for about 20 grand and some with rebuilds, and I have been checking and he is right. I know not to buy a truck without getting a dyno, my question being! What exactly does a dyno tell me?
HP to the ground ; chassis dyno. Flywheel HP ; engine dyno.
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Bob H
#4
12-04-2006, 03:03 AM
Most dyno's can gather a whole bunch of data. It depends on what you want to spend for the Dyno run. When buying a used truck you would want a power run with blowby and horsepower. You should also make them give you a print out with ecm miles if it is an electronic engine.
#5
08-30-2007, 06:28 PM
I am looking at a truck with C-12. Need help reading Dyno.
As I put in my other post. It has .2 - 1% blow by. Is this decent for a 2003 with 500K miles. At 1550 rpm it had 371hp & .775 blow by. 37.5 psi oil pressure and 20.8 lbs of boost.
#7
09-01-2007, 03:24 AM
When you piston rings or cylinder liners wear, a small amount of compression will get past the rings and go into your crank case. And this is called blow by. This is ussaully piped out of the valve cover and then headed down towards the ground with a steel pipe and then a rubber hose.
#8
09-01-2007, 11:18 AM
Originally Posted by 9200IH
When you piston rings or cylinder liners wear, a small amount of compression will get past the rings and go into your crank case. And this is called blow by. This is ussaully piped out of the valve cover and then headed down towards the ground with a steel pipe and then a rubber hose.
a small amount of blow-by is normal the rubber hose is often added by... someone after it leaves the manufacturer. the extra length can pull a lower than desired crankcase pressure that can cause a sort of "backdraft" intermittently which causes road debris ingestion..... not recommended. i've seen dusted engines refused warranty due to this add-on..... course, i've also seen the hoses added by certified dealers as a method of getting the blow-by oil drip off the i-beam, so...................
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Bob H |
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