Thread: diesel into P38

Why not consider a TD6, gearbox, tfr case unit out of an early RR L322. If you have the compete unit then not so many electronic compatibility issues.

Oh - a few months back there was a low mileage RRS TDV8 engine and gearbox/tfr unit on ebay for $5000 and I don't think it sold as it was listed quite a few times.

Garry

Originally Posted by garrycol

Why not consider a TD6, gearbox, tfr case unit out of an early RR L322. If you have the compete unit then not so many electronic compatibility issues.

Because those gearboxes have very expensive issues. That's why I've been talking X5/X6 manual box which is the closest to interchange.

L322 also has a centred rear driveshaft, P38 is offset. Centred will interfere with fuel tanks etc.

Originally Posted by garrycol

Oh - a few months back there was a low mileage RRS TDV8 engine and gearbox/tfr unit on ebay for $5000 and I don't think it sold as it was listed quite a few times.

Garry

Major undertaking. But would be awesome if ever finished. The world is full of unfinished engine conversions turning good vehicles into scrap.

The world is full of unfinished engine conversions turning good vehicles into scrap.[/QUOTE]



This is why we do our research and ask our questions now, and why the 4BD1T with a suitable auto will hopefully be simple enough to make it work.

That's easy to say though.

Originally Posted by finallyrangie

This is why we do our research and ask our questions now, and why the 4BD1T with a suitable auto will hopefully be simple enough to make it work.

That's easy to say though.

How about the legal side of the conversion?

I believe that the engine needs to have been road legal in something at least as new as the vehicle it goes into.

This may mean an older P38a is the only option, I am not aware of any gearbox limitations, but am happy to be corrected if I'm wrong.

Originally Posted by finallyrangie

I believe that the engine needs to have been road legal in something at least as new as the vehicle it goes into.

This may mean an older P38a is the only option, I am not aware of any gearbox limitations, but am happy to be corrected if I'm wrong.

I don't like your chances of finding a 96+ 4BD1T.

Personally I don't see the issue running either the Td6, or the TDV8 through the 4HP24, JE and Nene Overland use them (with some of the Ashcroft internals upgrades) with the supercharge AJV8 conversions (480bhp and 550nm) along with the TDV6 (245bhp and 570nm) conversions.

I know there's differences in torque delivery between Petrol and Diesel engines, although 6 and 8 cylinder engines are a lot less likely to shake the box to bits, but certainly it's capable of handling the torque figures.

Obviously doing these conversions requires some knowledge to get everything to work correctly (unlike the example below) but again it's something that with a bit of time and research you can achieve.
The $5k TDV8 isn't a bad price, but the other $5k required to purchase the Simtek management system, and $650 for the adapter plate does push the cost up some.

Be an awesome car when it was done though.

Originally Posted by Dougal

I don't like your chances of finding a 96+ 4BD1T.

Just had a look, you are quite right, looks like 1995 is the limit of the 4BD1T, so that puts a limit on that option. I don't have a problem with a 1995, after that I Think the 4BE1 is next and they are supposed to be pretty solid units too, and maybe a little bit cheaper than the 4BD1. Yet another new thing to consider!

As always, open to suggestions