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- #121
My experience is the Landcruiser axles will handle a 40 PSI efficiently intercooled 4BT with a stickshift and aggressive driving. That's about 250 HP 550 lb/ft. That's spinning 33" tires in 3rd and 4th with 3.73 gears on dry pavement, but not dropping the clutch.
I feel like the factory automatic would not have the line pressure and shift firmness to handle a full throttle shift with that kind of power. If simple modifications/transmission tuning were done by a competent transmission builder the Landcruiser axles would probably be the weak link.
The Aisin transmissions have the clutch surface area and shaft sizes to handle these power levels, but just as all other OEM transmissions are set up for soft smooth shifts they will need some help past a certain point.
I think going into a Landcruiser diesel conversion with the idea of roasting tires is going to empty your wallet in a hurry unless you are thoroughly experienced in fixing all your own stuff.
If you want a level of diesel HP/TQ that moves the vehicle around a lot better than the gas engine did you have nothing to worry about. You can probably get into the pretty darn fast power range if you don't flog the hell out of it.
This stuff is ideal if you want a cool, practical, super MPG SUV. If you want monster power it's going to be expensive and completely impractical. More than factory power, no problem, but superfluous power and a heavy foot will cost the same as doing it with anything else.
