Wastegate hose size

[Quick Turbo V6]

I'm going to plumb my wastegates for co2 and I would like to know what size hose I should use, -3 or -4?

Thanks,
Scott

 

[RUQWKNF]

Depending on the type of hose you plan on using, I can tell you from personal experience that -3 SS line and fittings are a real pita to assemble. Most of the applications I have seen and helped people plumb (over the phone mind you) were using -4 with good results. I never heard any feedback or complaints about -3 vs -4 on wg plumbing issues. -4 should be fine.
HTH

Patrick

 

[TiAL Sport]

6mm ID minimum