Wastegate ?

[SlowerCivic]

Im going to buy a tial 38 mm wastegate and I can buy certain bars to put in it.If I buy a bar that is 0.7 (10.15psi) does that mean its adjustable all the way from 0 to 10.15.

[oxide7]

it would seem so, but ive seen some that only adjust like 5-10.15 you might have to call and ask them for info...

[JoeWagon]

No, it means that the minimum boost you can run is 0.7 bar. A boost controller can add to spring pressure, but not take away from the spring's rating. Choose a spring for the LEAST amount of boost you will ever need to run. That said, you don't want to go too extreme

Originally Posted by 95 GSXracer on [url

www.racingknowledgeonline.com[/url]] The higher the force on the back of the valve, the stronger the WG spring must be to hold it closed. Above I mentioned that you should choose as large a spring as you can based on the lowest amount of boost you plan to run. You will have some problems if you have a 6 psi spring, and try to run 25 psi on that WG. It will blow open most likely. You'll know because you will turn up the boost controller and boost wont increase. Or, as in my case, boost would be higher where it should be but around 6k rpm, it would drop the same 23 psi every time. The larger internal flapper (39mm) and 14-15 pound spring that couldnt hold it closed allowed it to open and leak exhaust past the turbo. While your airflow may go up, the system efficency goes to hell. When I switched to an external gate that could hold boost, my ariflow dropd back down, but power went up

[oxide7]

i thought he meant like a bar like s pice of metal, not atmosphere..

[JoeWagon]

Well, it's a spring that is rated in how much force it takes to open. a 1 bar spring in a wastegate opens the wastegate at 1 bar (14.7 psi)

[oxide7]

i knew about the spring, i just didnt know what he meant lol.

Oh well your right tho.