forcd ind

iTrader: (7)

My 50 MM wastegate came with one extra spring-does anybody know what spring they install from JGS, and what the extra one is
While I had it on the lift, I noticed exhaust inside and can see on the shaft that it has opened
I have only seen 122 KPA on the log, and haven't been over 4900 RPM, which is around 3 psi of boost-I only have a line to the lower port, but might install a boost controller
Hopefully the extra spring is stronger

bigmandengo

iTrader: (21)

The wastegate spring info is posted right on their website.

GMCtrk

iTrader: (23)

Their website isn't accurate because it states they come with 3, but my 50mm also only came with 2 springs.

The one installed from the factory is the light spring (gave me 7-8 psi on gate only). I changed it out with the stiffer spring supplied and get 16-18 psi with my eboost sensitivity at 0. This should be the stiffest spring.

turboventura

If you have a spring in there that makes 8psi of boost, it might start cracking at 3-4psi, its not an on/off system. When i switched from a spring that made 10psi to a spring that made 17 I was surprised how much faster it spooled, just showed how early the gate was cracking.

forcd ind

iTrader: (7)

I think I will change to the extra spring, at least I can mic. it and know if its
the med or thicker one
Good call on that valve creeping, didn't think about that

forcd ind

iTrader: (7)

I contacted JGS, they said the extra spring that came with my wastegate was intended to be added to the ex spring
I pulled it apart, had a large red spring, so I added the extra spring
Really made it hard to reinstall the wastegate onto the manifold since there is a seat that has to get compressed so the v clamp will go on-I compressed the valve and wedged it open, then it was easy
I'll get see what boost I get now

dirty_old_chevy

Interested to see how much boost you see on your combo. With both of the springs in, my 50mm jgs made 23 psi. But that was a 1.10 a/r T6 s475 on a 4.8.

forcd ind

iTrader: (7)

Wow, I hope I don't see that much-having a conversation with a buddy of mine, it dawned on me that I had my boost line to the waste gate plumbed
just after the pipe out of the turbo, before the intercooler-that might have been causing some of the problems
I might switch the line to the intake, but I am going to but a safeguard in the computer in case boost gets crazy

tiznodd

iTrader: (4)

They make 3 large diameter outer springs and one small diameter inner spring. I tried the light and medium outer springs and got 7 and 9 psi respectively. The inner spring is really stiff and is to be added to the larger diameter outer springs when you're looking for a significant increase in boost. I have a feeling it's meant for the import guys running 30+ psi.

My JGS gate came with the light outer and stiff inner. The other two outer springs need to be ordered directly from them and the damn shipping costs as much as the spring.

forcd ind

iTrader: (7)

I had a chance to take the car out today and test it with the inner spring installed
What a diff, with light throttle it now jumps up to around 160+ KPA, close
to 9 lbs boost-it def will go higher with full throttle and more RPM
I will do some light data logging this week, see where things are at
i'll have to look at the learn table, I would imagine it added some fuel
It was only seeing 122 KPA with just the light spring