Thread: How to get 400Nm from RRC

Originally Posted by Dougal

Surely 400Nm of smooth v8 petrol would would easier on a gearbox than 300Nm of TD5?

Just about every upgraded TD5 in a Disco2 has a ZF 4HP22 behind it, not even the HD 24 version. They will last if they're not overheated (ie keep the ATF cooler clean). These put out 400Nm.

Originally Posted by justinc

therein lies some of the problem, the black 5 litre was the most gutless and inefficient of them all...in one of the worst cars, too. I remember driving a 5 litre auto VK ex pursuit car and manual shifting from 1st to 2nd at hard revs, only to have the vehicle almost swap lanes and twist the shell to the point where I was 100% sure I heard the drivers door creak/ pop

Not a good comparison at all.

And the ZF autos in the RRC cannot handle large torque numbers from large 4 cylinder diesel engines, either

jc

A few mates had these with mild 308's, the rear doors hardly shut as the body had twisted so much, what a pos they were, and so very detuned . Then I had mates that had 11-12 second HQ monaros with 308's that were there daily drivers and very street able cars.

Originally Posted by justinc

Yeah but the Lans weighs more than 6 range rovers, and steam, well yes monstrous torque at zero revs so I concede that would be by far the best bang for buck for RRC engine upgrade


JC

And wasn't it fun starting a Lanz on a cold morning. Bode & Co. in Winton built a crane for their engineering works on one. Normal practice was to use the shop oxy-acetylene set to warm up the vaporising bowl. If it was to be used throughout the day then you would turn it down to low idle and let it shake away all day rather than go through the starting drama again. Mind you, the pre-chamber diesels of that era were pigs to start.

Jose from TD5inside told me that they were getting 500nm with the standard turbo
Let alone a VNT

Originally Posted by Slunnie

Just about every upgraded TD5 in a Disco2 has a ZF 4HP22 behind it, not even the HD 24 version. They will last if they're not overheated (ie keep the ATF cooler clean). These put out 400Nm.

Originally Posted by djam1

Jose from TD5inside told me that they were getting 500nm with the standard turbo
Let alone a VNT

Absolutely. Chip and Intercooler. I hear two lines of opinion on whether that can be put through the auto (and I do run chip and intercooler), some saying that the auto will fault with too much torque, but I'm not sure if that is based on actual torque or a calculation by the ECU.

Originally Posted by djam1

Jose from TD5inside told me that they were getting 500nm with the standard turbo
Let alone a VNT

You'll need 30+psi to make 500Nm on a TD5. The standard turbo CANNOT do that safely.

Dougal just repeating what he said no idea really
I have 25 PSI running on mine no idea what its producing although it does have VNT.

Originally Posted by djam1

Dougal just repeating what he said no idea really
I have 25 PSI running on mine no idea what its producing though it does have VNT though.

You can make the numbers with less boost, but only by putting EGT through the roof.