Originally Posted by Bosch Dealer
...then dougs spec is not suitable...
Not suitable for what?
Originally Posted by Bosch Dealer
maybe different cam timing or camshaft to eliminate that 2bar surge or ported shroud would sort it...
Ported shroud would compromise the top end potential, and altering the cam timing to avoid surge is likely to adversely effect the low down torque of the engine, how are those two options "right" and capping the boost slightly for a small portion of the rev range is "wrong", that makes no sense when ALL are compromises surely?
Originally Posted by Bosch Dealer
your engine should be able to consume what the turbo can give at any rpm otherwise you are having to compromise by getting round it.
What are you having to compromise? and why for example is it better to make the engine waste boost by pumping it straight down the exhaust with lots of overlap?
Do you not understand that EVERYTHING about building an engine is a compromise?
Cam choice for example, if you want it up top you lose it down below, thats a compromise, CR, thats a compromise, exhaust size, thats a compromise, why is a slight boost cap ove a limited RPM range on an engine a worse compromise than any of those other factors?
Originally Posted by Bosch Dealer
..i will say my MAD engine didnt have any surge at 2bar on the gt35 non ported shroud..but i cant say what cams or timing it had.
...be interesting to know wether Rod has had to map around or compromise on his new turbo?
Rods new engine is one enormous compromise, just like his last one was, his engines have never been anything but compromise, thats the whole point of his car, to be both a top speed car AND a road car, you cant get a bigger compromise than that!