yea ill speak to monk about it
Also my gramper just got a good deal on headbolts £17
and £70 odd for head gasket
What about new mani guys,what you recommend
Autobahn stainless steel from Dave Burwash. £125 alone, or £150 with the toyota manifold gaskets inc. less then half the price of any other manifold
Whoever modified the car was obviously a right tit. the CT-9 turbo becomes inefficinent after 1 bar. this is due to the size of the compressor, after 1 bar it starts to generate a massive amount of heat. Hot air from the turbo reduces performance drastically, as well as increasing the air temperature inside the engine.
As people have already explained, the 3rd runner in the stock manifold has a big restriction, so the engine struggles to shift the air into the exhaust at high boost which is the reason why your 3rd piston is fucked.
Even with a new manifold, the maximum boost your car should be running is 1 bar. Monkfish's car is a very good example of how it should be done
With a hybrid/Blitz K24 etc turbo you can run a little more, between 1 and 1.2 bar. At this point you should be looking to forge the engine (pistons and rods) becasue your newly rebuilt engine won't last very long at that boost
I still can't believe your car is running 1.3 bar. i'd go back to the person who you bought it from and give him a massive slap across the face.