Thread: 4.6 into '81 two door

The only part of the P38 you will be able to bolt in your '81 is the assembled engine block and heads. You need to fit your manifolds, cam, front cover, sump etc. Everything else is entirely different.

If the 4.6 is a known good engine (hasn't been hot) then it would be a good power upgrade for the Rangie. As Bee Utey said, you'd need to bolt on a lot of stuff from your old engine but it is all doable.

Can you isolate the injection computer and move the entire thing over ( you would need a fuel tank from an injected car). Surely you can just bolt the whole engine to the existing gearbox.... and work out the electrical side (I'd love to megasquirt & megajolt something ...).

seeya,
Shane L.

.......what about the diffs.....are they a better set up ?....is it worth the mucking about ?...will the 4.6 bolt to the existing integral gearbox/transfer ?

Roger

When I said only the basic engine I meant only the basic engine. Diffs are on the opposite sides to the RRC, suspension, bolt patterns etc are all totally different. Oh and the starter motor is the same. That's it. As for stuffing around fitting up all the P38 fuel injection, that's a way to waste thousands. There are easy upgrades and there are totally nutz upgrades guaranteed to drive you bonkers with electronic security work arounds. Far better to just drive and fix the P38.

Sounds like you're running the LT95 4 speed box? It should bolt straight up - the bolt pattern on the 3.5 and the 4.6 are the same I believe. Maybe the spiggot bearing will need to be done?

Not sure about the diffs - they certainly aren't a bolt in job, but no idea what is actually involved - they are very different to the earlier Rover diffs.

Originally Posted by bee utey

When I said only the basic engine I meant only the basic engine. Diffs are on the opposite sides to the RRC, suspension, bolt patterns etc are all totally different. Oh and the starter motor is the same. That's it. As for stuffing around fitting up all the P38 fuel injection, that's a way to waste thousands. There are easy upgrades and there are totally nutz upgrades guaranteed to drive you bonkers with electronic security work arounds. Far better to just drive and fix the P38.

Surley putting megsquirt on a land rover V8 has been done thousands of times.... grab some transformer coils build the kits ... download the maps others have already created on dynos (should be near enough) and have fun You could run it on LPG too ... and do away with the injection.

I'm guesisng your swapping the cam etc...to gain a dizzie drive. I'd treat it as a project and fit a trigger wheel and transformer coil/megajolt. I'm betting there is step by step instructions to do this on a rover v8 out there if you look You could run oxy sensors etc quite easily that way too and get some really nice fuel maps running.

A much bigger project than just sticking another engine in there .... But I reckon it would be fun for a project car.

seeya,
Shane L.

Originally Posted by DoubleChevron

Surley putting megsquirt on a land rover V8 has been done thousands of times.... grab some transformer coils build the kits ... download the maps others have already created on dynos (should be near enough) and have fun You could run it on LPG too ... and do away with the injection.

I'm guesisng your swapping the cam etc...to gain a dizzie drive. I'd treat it as a project and fit a trigger wheel and transformer coil/megajolt. I'm betting there is step by step instructions to do this on a rover v8 out there if you look You could run oxy sensors etc quite easily that way too and get some really nice fuel maps running.

A much bigger project than just sticking another engine in there .... But I reckon it would be fun for a project car.

seeya,
Shane L.

No harm in your ideas, wasting thousands and thousands on an old 2 door, if you have them to waste. Not withstanding anything else, there's a near 100% chance a wrecked non driveable P38 has a cracked block and slipped liners so you're up for say $6K before you can even bolt the block in. I can think of more practical ventures for $10K myself, like a 4BD1T for example.