difference in 4.2D and 4.2TD

[sturra82]

just wondering what differences were between the 4.2D and the 4.2TD. And how will a 4.2D take and aftermarket Turbo and what sorts of boost has people been running in it with out a problem.

[roverrat]

whoa whoa whoa cowboy too many variables be more specific.

diff between 4.2 and 4.2TD

4.2TD 114kW @ 3600rpm Torque 360Nm @ 2000rpm
4.2 85kW @ 4000rpm Torque 264Nm

aftermarket turbo 4.2 specs vary

safari quote 120kw 375Nm from intercooled kit

boost is another question all together it is a depends type answer

[sturra82]

sorry, im looking at a GU Ute 4.2D and wasn't sure how it went with an aftermarket turbo if i wanted to turbo it later on down the track. a mate at work told me the pistons were different after 95 in the 4.2D compared to the 4.2TD. I was also trying find out if the CV joints and diffs were different because i was told that the GU had tougher Front diff and CV joints then the GQ and wasnt sure if it made a difference with the different motors.

[mr_wonderful]

the difference is on a non turbo 4.2 out of a gq has cast pistons and the vacuum pump is on the alternator and 4.2 turbo out of a gu has forged pistons and the vacuum pump is on the timing case below the injector pump
but you can turbo a gq motor with out any dramas its only when you get into high boost pressures that you need better pistons

cheers

[azzad]

What do you call high boost pressures?

[mr_wonderful]

anything over about 15 -25 psi but i say that mine runs 28 psi in a standard engine and had no complaints but i know of others running about 17 that have buggered there engine

[PGS 4WD]

The factory TD42 turbo engine has an oil cavity under the piston crown that is fed by the oil squirters in the block for piston cooling, it also has a larger rod and piston pin than the non turbo engine.

Cheers

Joel