Vehicle & Technical > Range Rover

engine swap

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discodee:
Good luck and once you get on the road again can you please tell me how you get on if they hold up as id like a bigger engine you know what they say you cant substitute horsepower or some pish like that,cheers the noo

Range Rover Blues:
I might suggest that the 4.2 would be better suited to an auto box but if you have one it will be fine.  The Borg-Warner T-Box and ZF 4-speed auto were used on the LSE 4.2 along with standard axles, props etc.

My LSE has a 5.0 TVR derived lump :twisted:  and the drivetrain is still standard LSE.  It has been for 10 years and only the rear diff has needed swapping.

As for the ECU you definitely need a 4.2 ECU or better still get the RPI Tornado chip upgrade, suitable for 5.2L or the John Eals ECU, again suitable for far bigger engines than yours.

The 4.2 was famous for running lean which can fry the engine, one reaosn you don't see too many secon hand/you see so many LSEs with 4.6 engines.

discodee:

--- Quote from: Range Rover Blues ---I might suggest that the 4.2 would be better suited to an auto box but if you have one it will be fine.  The Borg-Warner T-Box and ZF 4-speed auto were used on the LSE 4.2 along with standard axles, props etc.

the RR I have has an auto box in it im not sure what kind its the standard one how can I tell what it is is there a mark or number on the gearbox anywhere and any idea where I can get the ecus from that you mention in your reply thanks for your time, :D cheers
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Range Rover Blues:
Simple, how many gears does it have?

In truth the early (chrysler) 3 speed is reputedly stronger than the 4 speed ZF (which has lock-up in 4th) but I regulary tow 2 tonnes plus and mine is fine.

There's an ECU on flea aby at the moment, I've seen them go for £150  (like 3.9 ECUs used to) but I think it's up for less than £100
Otherwise the RPI website will have details of getting a remapped chip fitted to your ECU.

There is a number on the auto box but I'd expect if it were a 3.5/3.9 unit the only difference is that it might rev a bit more than the 4.2 box, otherwise it's the same thing IFAIK.

Chris Kelsey:
It is common in Australia to put 5L chevs in the older RR without doing anything to the drive line and providing ur not dropping the clutch you shouldnt have a problem
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