Question about wastegates and springs
Question about wastegates and springs
Say I get a Tial 35mm or 38mm Waste Gate. There are a couple different spring choices. I'm thinking I should get a .4 bar(5.8psi) or .5 bar(7.25psi) for daily driving on a t3/t4 setup. Is that right?
ill explain what a boost controller does. a waste gate runs off of a vaccum line and if u run a 5.8 psi spring the wastegate will open when it "senses" that the vaccum line is at 5.8psi. when u add a boost controller, the boost controller is attached to the vaccum line that the wastegate is attached to. when u raise the boost with the boost controller the controller is altering the boost in the vaccum line that the wastegate reads off of. example: u are running a 5.8 psi wastegate and a boost controller, when u turn the boost up with the controller it is weakening the pressure in the vaccum line that the waste gate senses. so when u up the boost your manifold may be at 8 psi but due to the boost controller the wastegate may only read 4 psi which will cause it to stay closed until it reads the 5.8 psi that it is set at to release.what a boost controller can not do is raise the pressure in the vaccum line so that the wastegate reads 5.8psi before u are actually running 5.8psi. this is the reason the springs u are looking at are warning u about 5.8 psi being the lowest possible boost u can run. if u only have 4 psi of boost in mind u WILL NOT be able to use that 5.8psi wastegate. the safer choice is to go with a spring that is a couple psi lower than the minimum boost u plan on running that way u can always raise the boost with a controller but also allow the engine run at a low psi when u are in the tuning stage of ur project.hope this helps u out!