p40 engine info

[MQ MAD]

I have a G60 with the P40 engine and it is one of the better 4wd engines that I have driven. It will pull away from 100 rpm and can be idled over a rock at that speed. almost imposible to stall and awesome internal inertia for poping up that rock face.
I had to fit a holden carby for the steep stuff as the original Nissan kept overfueling with the nose well up. the holden does as well but not as much. The combo of the small bore and long stroke gives usefull torque at bugger all revs, Put a chalk mark on the flywheel and play with the idle screw and you can count the revs by eye. (doesn't charge the battery much at those revs though)
As mentioned elsewhere I now have a couple of MK's with the L28 engines and am strugling to get usefull low torque and subsequently keep stalling them. The LPG engine needs 1000 rpm to get going wheras with the P40 starting off at idle throttle and 400 rpm was a doddle.
IMHO the L28 was a very poor choice for the MQ/MK . The L28 is just too undersquare. --Nice engine , loves to rev, great for the skyline, but wrong for the MK. A revamped P40 would have been much better. I am contemplating a transplant.

The L28 MQ/MKs dont have anywhere near the torque of the turbo diesel , and the P40s have more torque again
But the L28 will out rev both,and do it all day
Ive got both the turbo diesel and the L28 and on the same rather steep river bed, the little L28 has to scream to pullout, but the diesel is just over idle