Thread: Has anyone compound turbocharged a TD5?

The 3 litre Iveco is a great example of just the type of engine that I believe should be in a Defender.

• Enough torque off idle to pull away with a load without boost pressure
• Best configuration for obtaining high efficiency, i.e. four cylinders with 16 valves and injection on the centreline.
• Compound or sequential turbo charging for that fat torque band.
• Four cylinders to reduce cost, both initially and over the life span.
• No need to spend $$$$ for performance upgrades, and economical fuel consumption.

Originally Posted by isuzurover

That is a bit unimpressive, we all know the TD5 can get 500 nm with just a remap

With a smoke-screen thrown in free and no EGT measurements ever taken.

Imagine the TD5 with a four valve head and compound turbo's....

Shame they aren't a more popular engine as some enterprising engineering company like Harrop have the means to model and have cast a new assembly.

meh, its only $$$$ im sure if you had the bucks you could even get someone like KOneingseggggggggg to build you a cam less head

Originally Posted by rick130

Imagine the TD5 with a four valve head and compound turbo's....

Shame they aren't a more popular engine as some enterprising engineering company like Harrop have the means to model and have cast a new assembly.

Toyota doubled their 4cyl 2.2 litre diesel to form the 4.4 litre V8 in the current Landcruiser. My imagination inevitably forms one half of the V8 Duramax.

Originally Posted by rick130

Imagine the TD5 with a four valve head and compound turbo's....

Let's see.
Solid bottom end (sharing crank dimensions with the Nissan TD42).
4 valve head that flows well.
3 litre displacement.
Possible fitment of a VE rotary injection pump. Cummins 4BT pumps can do ~180cc/1000 shots (enough for ~800Nm)

Guess who!

Originally Posted by Bush65

Toyota doubled their 4cyl 2.2 litre diesel to form the 4.4 litre V8 in the current Landcruiser. My imagination inevitably forms one half of the V8 Duramax.

I've been wondering this for years. Solid 3.3 litre 4 cylinder commonrail. But the yanks don't have the market for it and the Japanese probably consider it tainted.

Originally Posted by Bush65

Toyota doubled their 4cyl 2.2 litre diesel to form the 4.4 litre V8 in the current Landcruiser. My imagination inevitably forms one half of the V8 Duramax.

And entirely do-able (with enough $$, time and enthusiasm!)

I think I may have mentioned in the past me ex-JRA engineer mate who I worked with in motor racing was building a Leyland 4.4 based TD using Tdi Landy pistons and twin VW/VE pumps in the mid nineties.
He had the truck block (forged crank, 4 bolt mains) pistons and pumps but it never progressed past the mock up.

He works on design/electronic integration for a truck manufacturer nowadays and gets to play with all these nice, modern diesels.

I try not to let the mind wander like that anymore, it inevitably leads to frustration !

Originally Posted by uninformed

meh, its only $$$$ im sure if you had the bucks you could even get someone like KOneingseggggggggg to build you a cam less head

I drew up a rotary valve head years ago, but the problem with them has always been sealing which I reckon I could overcome, but smarter heads (pardon the pun!) than mine were never able to properly solve that little issue.

Solenoid activation of poppet valves opens a lot of possibilities!