1303 Mythbuster -> 2,4 ltr T4Turbo

[bill77]

Must be quite satisfactory !!! Congrats !
Big grin on your face ?
After all the hard work and deep thinking ...

[Airspeed]

Thanks for keeping the thread alive mon amis!

A moment je suis constructer noveau moteur: 102mm Deutz x 74mm = 2,4 ltr
JPM camshaft.
Alors peut etre encore plus de CV..?

Greetings,
Walter

[bill77]

415 was not enough ?

[Airspeed]

415 was not enough ?

Its not of course and the engine would have made 500 easy, if it wasn’t for a building mistake (switched pistons) of me that resulted in engine damage...
So I had to rebuild it again.

[bill77]

Bad luck !
But that's what winters are for, rebuilding the new beast that will dump everybody out there next spring !!!

[ElPax]

The vw aircooled that run and the most powerful to my knowledge.

The subaru engine are aircooled...

[Airspeed]

Almost ready to be installed:



I'll try to run it N/A first, so I have a baseline again and because I want to try a new (patented) idea on the exhaust

[Superflo]

Keep the pictures coming

[coxy-ben]

[ElPax]

Nice engine

[Alex]

[kevin]

Nice job Walter, congratulation
Did you cut the Deutz cylinder under clamping load similar to an installation on the engine?
While cutting mine to bore size of 105mm I measured a deformation of 0.03 to 0.04mm with the 4x 35Nm torque which represents a significant part of the operating clearance. Therefore I machined my cylinders under pre-load as they recover 100% shape (elastic deformation)

Did you by any chance measure how they behave with a 102mm bore diameter?

[Airspeed]

Nice job Walter, congratulation
Did you cut the Deutz cylinder under clamping load similar to an installation on the engine?
While cutting mine to bore size of 105mm I measured a deformation of 0.03 to 0.04mm with the 4x 35Nm torque which represents a significant part of the operating clearance. Therefore I machined my cylinders under pre-load as they recover 100% shape (elastic deformation)

Did you by any chance measure how they behave with a 102mm bore diameter?

I understand and you did good practice with that!
These were however new german cylinders (not the china copies) and were already 102mm to start with. So, I didn't bore them and machinework for shortening was done elsewhere. They are extremely thick and sturdy (very good hard iron), so making them shorter only won't distord anything.

[Airspeed]

Keep the pictures coming

Ok

Repaired the damaged head:


Crank assembly goes back in with same bearings and all:


With the Deutz cylinders, I wanted some extra cooling.
This is for a little lower engine bay temps:



and this for some extra oil cooling reserve:

Top one is my old cooler I had in there for over 15 years or so...
Bottom one is Mercedes as well (from ebay ) but obviously just bigger thus better and fits just behind the front valance grill!

[Airspeed]

Apres N/A assembler exhaust with anti-reversion chambers: