Manual Boost Controller


Building a boost controller is a “slippery slope” sort of mod. Once you complete this you’re just going to want/need to modify something else in the system. A turbo-charger improves the performance of an engine by cramming as much air and fuel into the engine as possible. The engine exhaust drives an impeller in the turbo which drives the compress wheel in the intake path. Engines can’t handle extreme pressures so once the intake pressure reaches a factory set point a “waste-gate” opens to let the exhaust gas bypass the drive impeller so the turbo won’t produce any more boost. Factory boost settings a usually very conservative (otherwise, they’d be doing a lot of repairs) so there is a lot of potential for improvement.

A manual boost controller is placed in the path of the waste-gate’s sensor. The controller bleeds off some of the pressure in the line so that the pressure measured at the waste gate is lower than actual. This tricks the waste gate into staying closed longer than usual so a higher level of boost is reached. They’re really cheap to build, but the most important expense in this project is to getting accurate boost gauge. A little bit of bleed goes a long way and there is no way to tell where you are at without a proper gauge. DSMtuners has quite a few articles on how to build these devices and should work on almost all turbo cars.

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Hackaday Links


ahh, finally back to some good old links. fresh off the grill of course. i’m working on new meeting space for philadelphia, and keep sending other meeting locations in so I can post them!

as for the guy who demands a t-shirt and wants to buy one: they are not for sale. these will be prizes. but maybe we can arrange something with a charity. then i’d see no harm in you paying an outrageous price ;)

breakout on a dot-matrix display sounds pretty good to me. [barbobot]