AuthorTopic: Anyone Swapped a 4.6 long block for a 3.9?  (Read 869 times)

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Offline kjj0506

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Anyone Swapped a 4.6 long block for a 3.9?
« on: January 02, 2007, 04:55:44 »
I have an icreasingly ticking , tired motor and am wondering if this swap is worth considering. I would probably try to find a motor out of a wreck to save some dough instead of a reman.
Ken
1990 RRC in constant flux
95 4.2 , Carter Fuel Pump , Powermaster 130 Amp Alt. , 2" OME Springs , Pro Comp ES9000HD's , 1.25" Spacers , Zirgo Elec Fan ( no more clutch fan ) , Remote Start , Aux Ligts , 110 A/C , Nice Stereo , Custom Bumper , Mostly New Bushings

Offline Range Rover Blues

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Anyone Swapped a 4.6 long block for a 3.9?
« Reply #1 on: January 04, 2007, 15:59:23 »
I've bought an LSE for parts and it has the later 4.6 lump in it with the '93 LSE front end/pulley anciliaries so they must fit.  IIRC the end float of the camshaft is controlled by a plate on later engines and the chain cover on early one but it's no big issue.

If you find a 4.2 that's another option.

The one problem to get over is that the EFi won't cope with the bigger engine, according to RPi, who are trying to sell the chip, you need a Tornado ECU upgrade at about £300 :shock:

Anyway, the RPi website is a mine of usefull information on the tuning up of the Rvoer V8.

try WWW.rpiv8.com
Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.

Offline kjj0506

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Ticking motor
« Reply #2 on: January 05, 2007, 04:06:51 »
I think I may just freshen and match port the heads , swap lifters and cam ( very mild - i hear there are some that actually liven up the mill while not decreasing mileage or drivability ) , put a chain on and a water pump and go drive places. Instead of spending a bunch of down time with the 4.6. I have been looking for a dead donor and have found nil.
Ken
1990 RRC in constant flux
95 4.2 , Carter Fuel Pump , Powermaster 130 Amp Alt. , 2" OME Springs , Pro Comp ES9000HD's , 1.25" Spacers , Zirgo Elec Fan ( no more clutch fan ) , Remote Start , Aux Ligts , 110 A/C , Nice Stereo , Custom Bumper , Mostly New Bushings

 






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