| Author | Message | ||
     peter nova (Peter) New Member Username: Peter Post Number: 23 Registered: 07-2003 |
after the 4.0 goes dead, i would like to put in a 4.6 in a 97 d1, can i still use most existing parts from the 4.0. has anyone down it and is it worth doing. | ||
| gp (Garrett) Senior Member Username: Garrett Post Number: 2384 Registered: 10-2001 |
there are several people that have done this. trevor g. on this board has done this and i am considering it, since my 4.0 shit the bed. | ||
| eric johnson (Eric2) Member Username: Eric2 Post Number: 164 Registered: 05-2003 |
Peter, Worth doing. gp, Do you, in fact, have pictures of the bed? | ||
| Jim Reynolds (4x4xfar) Member Username: 4x4xfar Post Number: 212 Registered: 05-2003 |
Trevor's side sticker says it all ... 4.6 off a Range Rover. Very cool | ||
| peter nova (Peter) New Member Username: Peter Post Number: 25 Registered: 07-2003 |
can you still use all the existing parts from the 4.0 to the 4.6, or do you have to get a new transmision and computer etc.. | ||
| trevor griffiths (Trevorgriffiths) Member Username: Trevorgriffiths Post Number: 190 Registered: 11-2002 |
The main mechanical differences between a 4.0 and a 4.6 are the connecting rods, crankshaft, and pistons. Other than that, it's a pretty straight forward swap, on a 96 and newer. My Autologic diagnostic equipment allows me to switch engine mapping from 4.0 to 4.6 with the push of a button. My Disco is a 94 , which is a distributor engine, and that required some other minor mods. Feel free to contact me with any questions. | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 127 Registered: 04-2003 |
I am in the early stages of converting a 3.9 RRC to a 4.6 torque monster myself. The 4.6 block is the essential ingrediant. Will assemble the entire engine before dropping it in. Also converting from fan belts to serpentine belt engine front. You need a large, clean, well equipt workshop. Need reference books. Lots of late night hours keeping me out of trouble. Randall | ||
| Alyssa Brown (Alyssa) Senior Member Username: Alyssa Post Number: 365 Registered: 01-2003 |
"allows me to switch engine mapping from 4.0 to 4.6 with the push of a button" Does this work on GEMS discos? Ron | ||
| gp (Garrett) Senior Member Username: Garrett Post Number: 2385 Registered: 10-2001 |
eric. here is the poopy diaper  | ||
| gp (Garrett) Senior Member Username: Garrett Post Number: 2386 Registered: 10-2001 |
the sleeve dropped about 1/8"+ and the top of the piston has been falling apart for some time. still ran good, but with low compression=less power. looks like the surface of a greasy diner grill. | ||
| A. Ali (Alia176) Member Username: Alia176 Post Number: 137 Registered: 03-2003 |
Randall, I'll be doing teh same thing shortly. Trying to come up with another engine stand so that I have both side by side! Let me know your progress. Ali | ||
| eric johnson (Eric2) Member Username: Eric2 Post Number: 168 Registered: 05-2003 |
gp Awesome diaper. | ||
| BRETT TRAVIS (Brettfromokla) New Member Username: Brettfromokla Post Number: 11 Registered: 11-2003 |
4.0 to 4.6l is a direct drop in as far as installation. However you wont have any extra power until you change the gems ecu to 4.6l parameters. You will need to find someone near you with a Rovacom and they can adjust the ecu for the 4.6 fuel mapping. The programming is in the ecu it just has to know which engine you have. Brett | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 130 Registered: 04-2003 |
There have been other comments lately indicating that the GEMS computer can be switch to 4.6 mapping. This is entirely possible. My Optimax chip(which is for the earlier CUX system) has two programs on it(3 if you count limp home mode). You really need the computer custom programmed to match the mods made to the engine. Also the main purpose of OEM fuel injection is to meet govt regulations. A lot more can be accomplished with these systems than satifying the feds. Randall | ||
| Mike Shoemaker (Shoe) New Member Username: Shoe Post Number: 26 Registered: 05-2003 |
I did it last year to my 96 disco and love it. worth every penny. Must do the chips so it runs right or you will go lean and burn up the motor again. The head bolt on, but check the rockers for any damage. The old ones tend to wearout and metal flowing around a new engine, Bad. | ||
| peter nova (Peter) New Member Username: Peter Post Number: 27 Registered: 07-2003 |
where would be the best place to order a new 4.6. I know I checked out ECR and theirīs goes for around 6,100. Is there a better place to go. | ||
| Mike M (Rangeroverhp) Member Username: Rangeroverhp Post Number: 119 Registered: 09-2003 |
I may be able to help. I sent you an email. |
