Don't forget that the N9tea engine had a bigger oilflow threw the bearings, and the turbo needs oil too
Accomplished by a different relief spring for the oil pressure...all other parts are the same.
The oil for the turbo is taken from a hole in the block that is simply plugged in the murena... an easy task drilling it out and fitting the n9te banjo bolt.
exhaustvalve's are sodium cooled
Only on the very first engines..all the later "TE" and the most powerful "TEA" engines have standard solid exhaust valves.
other compression
Hence the forged pistons.. the con rods and crank are the same.
I agree with you on that point... however... my car is already fitted with fuel Injection and a programmable engine ECU.. so it will just be the matter of adding the extra couple of sensors and have it all run in again.
and also there are thin pipes between exhaust manifold and cyl.head = there is bigger diametter of all exhaust holes in the cyl.head
Indeed... I saw that on Hans's engine. I have no Idea why these pips are there, but I have heard from people using the Peugeot manifold on the murena with no proplems.. and even of murena heads used in Pug's..
I take it , thats its just a matter of grinding the recesses in the manifold down to smooth it out..should not pose any problems as all.
I mean that the result will be absolutely unreliable.
If anything the superior pistons, and better ECU programming, will make it More reliable then a standard 505TI.Pistons always seemed to be one one of the Ti's weak spots. Especially if overboosted.
And the peugeot injection was just a big bowl of spaghetti with "piggy bagging " control boxes everywhere.. just ask Matra Hans.
If done properly, I have no doubt that the standard Murena 2.2 parts, with the mentioned alterations will easily produce 200 reliable horsepowers.
If cooling/intercooling is adequate, and revs are kept below 6000/rpm
In the end its (as with every kind of tuning) a matter of being realistic, and not go too far... as is often the case... ESPECIALLY with regards to turbos.. where some people just tend to turn up the boost without any other modifications.