MaxInProgress

iTrader: (2)

Im in the market right now for a tial 38mm wastegate. Now the thing that confuses me is this whole spring deal. Now i know 1 bar spring can hold up to 14.5 psi, does that mean if i want to push 14 pse that im gonna need the 1 bar spring? Or am I wrong or missing somethig here? Any help is appreciated, and please if you are boosted can you state what mm wastegate you use and what bar spring?

turbomax97

iTrader: (6)

No, basically the spring size - is the maximum boost that would be achieved with no boost controller installed. Also - the spring size is the lowest boost that the boost controller can set as well.

MaxInProgress

iTrader: (2)

So technically i can get a 6 psi spring and a boost conroller and be happy?

turbomax97

iTrader: (6)

yeah - thats basically what I have. without the boost controller i'd hit between 6.2 6.7 psi. With the boost controller - whatever my boost greedy heart desires.

Nealoc187

iTrader: (23)

What he said. Also they do suggest that you run a wastegate spring close to your boost controller setting however. Like don't run 20psi on a 5psi spring, etc, or you might get some issues (don't know the specifics, that just what I've read).

mtcookson

iTrader: (2)

basically, using nealoc's situation, if you had a 5 psi springs and tried running 20 psi using a boost controller there's a chance that you won't reach the 20 psi as the 5 psi spring wouldn't be able to keep the valve closed. this would be due to high pressure in the exhaust overpowering the spring. that's my understanding of it.