read alecs thread on turbos ,
basically you can only use a little bit of boost on a lot of engines without doing some engine mods ,
ie lowering compression uprating head gasket for starters ,
the more boost and power you want , the more engine mods you need ,
basically how fast you want to go , is directly in relation to how deep your pockets are ,there is no such thing as cheap power .
I dont see why a bolt on turbo is a bad idea though alec? You can run about 220 bhp on stock internals on a D series. As long as the engine will handle it (if you upgrade it etc) why not boost? as long as you dont skimp and get it mapped properly you would have any problems
You can run a low amount of boost on stock internals and it will be fine! However if you were to just buy a turbo kit off ebay and slap it on without any ECU mapping and try run as much boost as humanly possiable then yeah ofc your going to have problems!
A turbo build is not something for the faint hearted and most people that do them know what they are doing so they will upgrade internals and get it mapped properly.
I was concidering turboing my EK at once point and even got to the stage of bidding on a few kits but decieded against it as the engine had done a lot of miles and thought it might raise some complications with the LPG as well
they dont but if ur properly boosting an engine (built engine-pistons etc) then you need to change the camshaft. if ur thinking about bolt on stuff then most people use stage 1 cams with the kits anyway.