Dave's Evo X Build/The Life of Dave blog

[asshanson]

Originally Posted by Murlo26

edit: what kind of spring pressure would I need on the external gate? I am looking at the compgate ones that MAP designed their downpipe for and they go up to 26psi...I am guessing at least 20psi but maybe external gates don't need that high of a spring?

I'd say 50% of your boost at a minimum, so 15lb spring for 30psi max boost. I'd probably go with a 20-25lb spring though, doesn't hurt.

[Murlo26]

Originally Posted by scheides

idk man, you made ~550whp @ MAP with the tubular on your old setup @30psi, maybe you'll make a little more with some tuning and such. Going beyond that is starting to push the setup....I am with shane on blowing the turbo, but at the same time if it makes the engine more efficient @ 30psi, then game on. Ultimately up to you.

I will say that my BBX fukin RIPS at 33psi but I really really don't want to push it so ~30 is all it'll see I think, I want to keep it together and healthy for a long time.

Well this time I will make a TON more at say 30psi as I now have 2.2L and 10:1 compression coming. I was honestly planning to run around 25-26psi and see where that gets me. I just wanted the external gate on the downpipe for if, probably when, I want to go crazy on E98 and max the setup out.

I am now a member of the I want a car that works for a long time and I can more or less beat up because I am not on the ragged edge.

Originally Posted by asshanson

I'd say 50% of your boost at a minimum, so 15lb spring for 30psi max boost. I'd probably go with a 20-25lb spring though, doesn't hurt.

Hmm, well my internal gates wastegate pressure is 21-22psi so i am guessing I want at least that. I'll have to consult with Shane.

[311evo]

Originally Posted by Murlo26

I am now a member of the I want a car that works for a long time and I can more or less beat up because I am not on the ragged edge.

Wat? You just mentioned maxing your turbo out with that new set up and not caring if it blows up, yet you wanna be in the "have fun and don't break" club?

Do what ever makes ya happy, I would just like to see your car on the road more and worry about the extra 20whp later.

[Kracka]

Originally Posted by Murlo26

I am now a member of the I want a car that works for a long time and I can more or less beat up because I am not on the ragged edge.

This makes me think you should stay with just an internal WG and use one of FP's high pressure WGA's.