k i just got my clutch done yesterday and while i was there the mechanic said that since i put on a BOV that i should un hook the vaccum line on the wastegate cuz i could get more constint boost. just checking here before i went and did it. also what cons would there be from doing this ???
I asked the same question at work and basically was told not to do it. The wastegate prevents overboosting which could destroy your engine. A friend of mine told me once that he had put a small valve in the vacuum line so that he could cut down the amount of vacuum but still have some protection for the engine. I really dont see how this could work, vacuum isnt like pressure where you can "turn it down" but I may be wrong. Maybe someone else on here has heard of or used the valve trick.
I plan on living forever... so far so good
the function of the wastegate is to controll the boost. the wastegate has a spring in it, and it takes a certain amount of pressure (manifold pressure) to move the actuator. the actuator in turn pushes open a valve (the wastegate itself) and exaust gasses to bypass the turbine, therfore not allowing the turbo to continue spooling. without a wastegate, you would always be running the maximum amount of boost the turbo will produce, around 19psi on the stock turbo.
now a blow off valve has a completly different job. when you are in boost and you close the throttle plate (let off the gas), you have a lot of pressure build up in the charge pipe, and this pressure can actualy stall the turbo (make it stop turning). now to prevent this, you have a blow off valve (or recirculator valve). when the throttle snaps shut, you have vacume in the manifold and pressure in the charge pipe, and this forces the BOV open and vents the pressure in the charge pipe. this keeps the turbo spinning and reduces lag when you get back into the throttle.
both things do 2 different jobs. dont unhook anything. even if you did unhook the waste gate you would get more boost, but only for 2 seconds. the factory tuning has overboost protection. if the ecm detects more than 12psi for more than 2 seconds, it shuts the injectors off till the you are back out of boost.
As Stated, do not unhook the wastegate. Rather,get a manual boost controller, as the stock ECM programming bleeds boost in 1st and 4th/5th gear to limit wheelspin and top speed. You'll pull a lot harder at low speeds with a MBC for this reason. Plus the stock ECM leaves the wastegate open all the time just a little to prevent power surge etc... so you'll spool the turbo faster in any gear.
how about a dual boost controller would that do the same cuz planning on doing that on saturday
Um What? I only speak english...
Protonus wrote:Um What? I only speak english...
lol k i have a turbosmart daul Boost controller (electronic boost controller) that would do the same plus some better then a manual boost controller right. i ask cuz i am planning on hooking it up on saturday
chris servos wrote:Protonus wrote:Um What? I only speak english...
lol k i have a turbosmart daul Boost controller (electronic boost controller) that would do the same plus some better then a manual boost controller right. i ask cuz i am planning on hooking it up on saturday
Assuming you're comparing a dual setting electronic boost controller, to a manual adjustment single setting boost controller, and neither controller leaks and bleeds ok, then the only difference is:
1. The electronic controller if installed well/designed well, could be adjusted from in car, instead of underhood
2. The dual setting allows you to set a low and high boost, either for 1st gear, or for street/strip etc.
So it's only superior really in "Features"... the horsepower you'd get from either would be the same.
