ive been told one way to give the old slug a bit more oompf to 'turn up' the screw on the injector or fuel pump. to give it more fuel. just to turn it till get black smoke then back it off a little. i am just wondering what/where this screw is, do you turn it in or out. i'd imagine this would have to be 'turned up' when turboing the bus aswel. pictures would be great.
TIA
TIA