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3.5 to 3.9 motor swap

Tech Talk for Rover owners.

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Posts: 160
Joined: Fri Nov 08, 2002 7:55 am
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3.5 to 3.9 motor swap

Post by madrangie »

Hey guys was wondering if anyone knows if i was to replace a 3.5 injected motor out of a 87 range with a 3.9 from a 94 disco, will the motor ecu just plug straight in or is the pin/wire configuration different ?
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Re: 3.5 to 3.9 motor swap

Post by Loanrangie »

madrangie wrote:Hey guys was wondering if anyone knows if i was to replace a 3.5 injected motor out of a 87 range with a 3.9 from a 94 disco, will the motor ecu just plug straight in or is the pin/wire configuration different ?
which ecu do you want to use ? the later disco one will be wired differently, you should use the complete 3.9 loom and ecu.
Saddle up tonto, its the not so loanrangie! . 98 TDI DISCO lightly modded with more to come.
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Post by GRIMACE »

or keep the 3.5.
honestly to date I still think my 3.5s were better than any of my 3.9s. :roll:
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mtor swap

Post by big dave »

just take the injection manifold off youre 3.5 and bolt it on youre 3.9 they have the same heads .
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Post by madrangie »

With the early model injectors thou will it run lean on the 3.9 ?
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Post by Loanrangie »

madrangie wrote:With the early model injectors thou will it run lean on the 3.9 ?
I think they should flow enough for a 3.9.
Saddle up tonto, its the not so loanrangie! . 98 TDI DISCO lightly modded with more to come.
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