External wastegate spring...

[bgsr240]

Is it possible to use a boost controller on an external wastegate like on a internal one? Also the wastegate that I am looking at has a ten pound spring. Does that mean that I will be limited to only ten pounds or do I have to buy a bunch of different springs? Thanks.

[S13FASTBACKSR]

an external wastegate does not mean you can only one run exact psi of boost such as 10psi. an external wastegate does not mean you cannot use a boost controller or does not mean you cannot up the boost..the spring size such as a 10lb spring in your case means that you cannot go lower than 10lbs of boost..that is your set gate pressure..you can get a boost controller and up the boost to 11,12,13 or any boost you want you just cannot go lower than your spring pressure of 10psi

[bgsr240]

Sweeet! Thanks

Do you know of any quality yet reasonably priced wastegates in the 38 to 40mm range?

[S13FASTBACKSR]

wastegates are pretty expensive and is not a part that I would buy a crap version of..you know like a knock off..then you will start getting boost creep..just search around for a good quality wastegate such as Tial or HKS..so far the cheapest place I found that sells them would be synapsemotorsports of NY..check in the vendor specials here on nico you'll find them

[bgsr240]

I noticed that the TIAL w/g has to air fittings on it. One is for vaccum and what is the other for? Thanks.