Wastegate Spring Selection

[rinmak]

Hey dudes

Say i want to run about 1-1.2bar. Ive got a tial 44mm wastegate on order but they say there will be a 2 week delay on the .9 bar spring. Alternatively, they have the .6 bar ready to go right now.

Would I be best waiting to get the spring closest to my desired boost level or would anything work so long as I have a decent boost controller setup?

Cheers,

Ryan

[GeeTR]

What boost controller do you intend to use to bleed off the rest of the boost?

Regardless, 0.6bar above spring pressure shouldn't be difficult for any controller (manual bleed or [well setup] EBC) from my experience.

Edited May 23, 2008 by GeeTR

[rinmak]

Profec B would be the one doing the controlling

Provided I can figure out how to use the damn thing

[R34NRG]

i would go with the .6

it means that you will run a minimum of .6 and up to how ever much u want.

where as if u got the .9bar thats like 1bar anyway. so the minimum you can run is 1bar of boost. which is proberly a bit shit cuz u got no choice in how much u run.

i say get the .6, but if u plan to run even more boost later on, stick with the .9

[Cjmartz2k]

You won't be able to boost as much as you want. Your boost controller can only go so much over what the spring naturally opens at. It depends on a few factors like how strong your boost controller is and some other stuff. Ballpark, I doubt you'll be able to go much over 1.3-1.4 bar on the .6 bar spring, if that much.

[rinmak]

Think il wait for the .9 bar, cheers fellas!

[-_-StRyDeR-_-]

how long would it take to change the springs? like once its installed on the car? or you cant..? :S (no idea about gates lol)

[BHDave]

i'd wait for the .9bar spring, but in all honesty a decent boost controller will be able to run a lot more than the base pressure.

My old setup had a .5bar spring and i was running a fairly stable 20-21 psi for dyno duties (1 psi drop over the run) with an old blitz dsbc.

[R31Nismoid]

As the golden rule - get the gate spring closest to the boost you want to run.

Helps eliminate gate creep, helps the EBC work better etc etc.

The .6 would be silly if there is a .9 on offer

[Cjmartz2k]

Depending on the mounting location of the wastegate though, they aren't really hard to change. If it was a matter of keeping my project off the road for a few weeks, I'd throw the .6 spring in there. If it's a couple of days though, or the wastegate is a pain in the ass to get too, wait for the .9 spring.

[rinmak]

Hahahah, "the project" has waited almost 2 years now, another 2 weeks aint gonna kill me

Cheers for your help tho guys, il be waiting for the .9

[T04GTR]

yeah, idealy you want the spring to be just stong enough to hold your boost. too stiff and it will spike.

my garrett 42mm gate has a 9psi spring, it holds 26psi dead flat all the way with a profec b.