buying on spec

John
a well recognised conversion that gives more power & torque than the original motor, great for towing, a bit thirsty sometimes, and SOME have temperature control problems.

I looked at this conversion before putting the 1 HT FTE Toyota engine in my GU.
Check my blog on this subject.
Project TONI

John, I have a 6.5 Chev/Patrol in NA form too. Mine pulls very well from idle, but it is a slow and low revving engine, so I often joke that I can easily beat a B-double in a traffic light drag!!! However, I am a bit older too (at 55), so my days of flogging an engine are well and truly long gone.

I try to drive mine like I drive a large truck....slow and deliberate clutch action, steady pressure on the LOUD pedal etc. You need to keep in mind that these engines are literally "agricultural" by design.....they were meant for tractors and trucks.

On the other hand I have a mate who also has a similar rig (except his is still a GU wagon, whereas mine is a dual cab) and he tends to drive his a bit harder...accelerates harder etc.

One factor that will have an effect is what diff ratios are in it? Mine is fitted with 3.9:1 diffs.

They are a great engine, but do have their "issues". Here is a link to a great deal of information: 6.5 Chev Diesel info

Hi John

I'd have to say I could see no valid reason for such a choice but we all have different priorites I guess.

I have seen some V8 petrol coversions (on gas) though and the thing that gets me is the NHV that usually comes with them.

You would need to be comfortable with that side of things as this vibration can get very annoying, and you sort of wonder about clutch life.

What I have observed with the normal 4.2 is a body resonance developed by the engine vibration at around 100-110kmh and its quite annoying in the standard diesel - much less in 3lt and non-existant in the 4800 petrols.