| Author |
Message |
    
Jason Johnson (Discomojo)
| | Posted on Saturday, July 27, 2002 - 07:36 pm: | 
|
Ok I know they are both the same displacement but my question pertains to the differences in the engines. I was wondering what would it take to place the long block of a 4.0 into a 95? Can it be done? Can the extra sensors in the 4.0 be ignored or looped so as to not effect the engine? Can I use the intake from a 3.9? I currently own both a 95 and 96 but I don't know if the 3.9 ecu can control the functions of the 4.0. Has anyone done this or know where I can find resources for it? |
Norm
| | Posted on Sunday, July 28, 2002 - 02:13 pm: |
|
Aside from displacement, all Rover v-8s (3.5, 3.9, 3.9"B", 4.2, 4.0 & 4.6) are virtually identical.
The main difference between the 4.0/4.6 motors and the '95 3.9"B" is that the 4.0 has a "short" camshaft, crossbolted main bearings, larger crank journals and uses the distributorless GEMS ECU, which uses the anti-knock sensors. The 3.9 runs on a distributor with a 14CUX ECU. Otherwise, the blocks are interchangeable. However, to put a 4.0 in a '95 and keep the 14CUX, you'll have to use a 3.9 camshaft to run the distributor.
If you're going to that much trouble, you might as well put in a 4.6 and rechip the ECU. It's a big power boost over the 4.0/3.9 and the cost is not that much more than a 4.0. Check the RPi website.
---Norm |
Jason Johnson (Discomojo)
| | Posted on Monday, July 29, 2002 - 10:42 pm: |
|
Thanks Norm- I'm on it. |
Mike
| | Posted on Tuesday, July 30, 2002 - 12:38 am: |
|
I know the 3.5ltr engine was a pushrod motor, is the 3.9ltr just a bored and/or strocked version of the same motor? Is the 4ltr a pushrod motor?
Mike
TAS, Australia |
Norm
| | Posted on Tuesday, July 30, 2002 - 02:20 am: |
|
They're all pushrod V8s -- I think Rover futzed with the old 3.9 stroke to make it into a 4.2.
Couple of other things:
If you do the 3.9"B" to 4.6 swap, you'll also use a 3.9"B" front cover/oil pump, timing gear, valve covers, oil pan and oil pick up tube. The 3.9 oil pan may need to be hammered out a little on the inside of the shallow end to make room for larger crank journals of the 4.6.
---Norm |
|
Closed: New threads not accepted on this page