Easiest way is off the vacum/boost solenoid etc ,might need a boost controller to progressively bring it in. Diesels produce a lot of torque low down ,so big boost low down standing start etc isnt best for the slushbox.dandywarhol wrote:Like adding a light spring to he actuator rod (assuming the boost isn't already at max)veebug74 wrote:Bigger isnt always better,you will more than likely introduce lag ,The gains will if any be marginal .
Whacking up the boost pressure would make the biggest difference ,providing the fuelings there.
Most cars are detuned for reliability100k plus milage,emissions etc and for all weather conditions meaning theres improvent to be had in a engine remap/boost pressure increase .Turned the boost up on my mitsubishi evolution rally car from 0.9 bar to 1.3 and the gains are huge fuelling is ok at that ,base maps for most car ecus are safer( ie richer) for safety and above reasons. 
providing u dont go too far 1.4 bar plus etc . .I now run 2.25 bar on an evo with a group a engine and gems ecu management .Look how vw and audi alter there hp and torque audi tt 180 bhp or a 22obhp option reflashing ecu ,chipping .vw T5s again the same.Need to rig up a boost guage to the turbo vac pipe my moneys on around 0.6-0.9 bar for a standard bongo. Should be a tag on the turbo giving id ie gt35 garret ,t25 etc ,would look at what other engines use that spec turbo etc as well
