How many PSI is my HKS w/g spring?

[blackout_89t]

This should help end confusion on these Wastegates:

HKS Wastegate Springs

Standard Wastegate Springs:

5.7 psi = White Spring
6.4 psi = Red Spring
14.2 psi = Yellow Spring
20 psi = Purple Spring

GT Wastegate Springs:

Silver (Center Spring)
White/Blue (Outer Spring - Soft)
Red/Green (outer Spring - Hard)

8.5 to 14.2psi = White/Blue Spring Only (no center)
12.8 to 18.5 psi = Red/Green Spring Only (no center)
18.5 to 24.2 psi = Silver Spring AND White/Blue Spring
24.2 to 29.9 psi = Silver Spring AND Red/Green Spring

Racing Wastegate Springs:

10 psi = Yellow Spring (Same spring as used in Standard WG [note different boost level])
14.2 psi = Purple Spring (Same spring as used in Standard WG [note different boost level])
18.5 psi = Gray Spring
22.8 psi = Brown Spring

Hope that helps.

Any idea if those colours/values apply to the knock off HKS wastegates? I got a few different springs with mine and have no idea what they are rated to.

 

[Supracentral]

Any idea if those colours/values apply to the knock off HKS wastegates? I got a few different springs with mine and have no idea what they are rated to.

When it comes to knockoffs, who knows? There might be a code/pattern or it might be whatever paint was cheapest that day.

 

[IJ.]

Or they let the shop Cat pick the paint that day instead of the shop Dog

 

[MK3Brent]

Adam.

Gimmie 2 minutes.

(edit)

Posted by JZA71

 

[blackout_89t]

Thanks Brent!

 

[X-man]

I have an old HKS (2000) catalog and it has the green spring listed in there as 10.2 psi for the standard 40 mm gate.
I could push 31 to 32 psi out on the road, but no higher than 29 on the dyno. It would however hold 29 psi until redline.
Sean

 

[MK3Brent]

I cannot attest to the validity of the said image, so don't hold me accountable for a misprint!

 

[Reign_Maker]

Sean, did your green spring look like mine, with just a bit of green on the tip or was it completely green like the painted ones Brent showed?

I just gotta determine what size I want before I put this puzzle of an exhaust together, because once its in, its gunna be a monster PITA to pull out and swap springs...

 

[X-man]

Yes, it looked like your spring and yes they are alot of fun to remove the wastegate from the manifold when it is on the car. I have done this on both the XSPower and my old HKS cast long runner manifold. That was one of the reasons I now have a Tial 44 mm wastegate as it is a v band mount instead of a 4 bolt mount.

 

[jtamulis]

I had two HKS wastegates one yellow (14.7psi spring) and one green (10.2psi)
purple is 20psi.

Jeff

 

[ae86ma70]

I had two HKS wastegates one yellow (14.7psi spring) and one green (10.2psi)
purple is 20psi.

Jeff

I do realize that this is an ancient thread, but I have some of the same questions. I have a Driftmotion 60-1 kit with the 50mm racegate replica, and think that I'd like a heavier spring. Where can I find replacement springs? Will the 40mm WG springs fit and just open at a different pressure? I'd also like a spring of a known value so that I can set my TruBoost. Maybe someone can do a writeup on how to use a compressor to test the opening pressure of an external wastegate. Or maybe a hand-held vacuum pump could be used? Thanks in advance.