read this steve. So is this the same for the VP fueled trucks?
The compression ratio's on 3rd Gen's are all the same.
The 17 vs 16.3 numbers only apply to 2nd gen ISB's.
All 3rd Gens are typically 17.3 to 1 ratio: SO's, HO's, And 600's, 610's etc.
They ALL have oil cooled pistons.
The SO's did not have the j-jets to shoot oil into the internal cooling chamber that is in the HO pistons.
The SO's retained the earlier upper bearing saddle based piston cooling nozzles.
On each engine the oil passage that is not used for cooling and lubrication is blocked off to retain oil pressure.
Its either one or the other: J-jet vs. Piston cooling nozzle
http://www.turbodieselregister.com/forum...difference.html
The compression ratio's on 3rd Gen's are all the same.
The 17 vs 16.3 numbers only apply to 2nd gen ISB's.
All 3rd Gens are typically 17.3 to 1 ratio: SO's, HO's, And 600's, 610's etc.
They ALL have oil cooled pistons.
The SO's did not have the j-jets to shoot oil into the internal cooling chamber that is in the HO pistons.
The SO's retained the earlier upper bearing saddle based piston cooling nozzles.
On each engine the oil passage that is not used for cooling and lubrication is blocked off to retain oil pressure.
Its either one or the other: J-jet vs. Piston cooling nozzle
http://www.turbodieselregister.com/forum...difference.html
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