Wastegate springs...cdm springs
 

Here's the deal...38mm cdm external wastegate (cheap xs-power junk :1) and it has a spring that hits 3.63 psi. I think I'm going to up the boost with a spring change that way I don't have to crank the mbc as much. They sent me a second spring with the wastegate (one that wasn't installed in it) that's a yellow color. Now according to ssac's site the small yellow is rated at 3.63 like it hits, but what the hell is this other yellow one for? They have a large yellow listed for 1.3bar or some crazy ----, but is that with the 2 yellow springs combined? Pretty much what I want to know (if someone know's off the top of their head) is what my pressure would be at with this other yellow spring only?

Re: Wastegate springs
 

try it and find out i guess

Re: Wastegate springs
 

Dan told me that TiAL's big yellow is like .8bar = 10.17psi. Who knows with them though.


JP

Re: Wastegate springs
 

Yeah, that's pretty much the same thing I've dug up on the tial springs as well. But because it's a cheap cdm knock-off, I don't know if I want to take that chance. :-\

Re: Wastegate springs
 

yeap just never know with those cheaper ones , I'd say try it and find out but risk factor :S

Re: Wastegate springs
 

Anybody have any idea on this spring size? Now it's more or less out of curiosity. :-\

Re: Wastegate springs...cdm springs
 

you could always rig it to a air tank somehow with a regulator and open it slowly and watch the gauge.. i think that would work. i tried to test a internal gate i rigged like this once but i just had a gauge hooked up no way to control the air pressure smoothly so it didnt work well

Re: Wastegate springs...cdm springs
 

Your idea may sorta work, but not well enough to tell spring pressure rate on the wastegate. More than likely it'll start opening almost right away, and how far it opens is how it controls your boost. Besides that, most pressure regulators don't go low enough to measure accuately. :-\

Re: Wastegate springs...cdm springs
 

just use a leak down tester on a cyl opemed to intake

Re: Wastegate springs...cdm springs
 

Quit being a ----- and install it.

Re: Wastegate springs...cdm springs
 

Havent you learned with a mbc yet? Keep that eye on the boost gauge nigga. If it goes past what you thought or wanted then let off. When I was using the pain in the ass greddy profec b-spec II I had to do the same thing till I got it set just right.

Re: Wastegate springs...cdm springs
 

My XS power Tial Knockoff shipped with a brown spring in the WG and a Yellow one in the box. The yellow one is a 3.6 psi spring. The Brown one is noticeably stiffer and I am unsure of what psi it is.

Re: Wastegate springs...cdm springs
 

That's the problem...they shipped a yellow spring with it, but the one that's in it hits 3.63 also. WTF did they do...ship me 2 of the same springs? :P

Re: Wastegate springs...cdm springs
 

If they are two different sizes the put them together. Play with it for a second and you will see what I mean.

Re: Wastegate springs...cdm springs
 

I dont think they know what size is in the WG I think they just toss in whatever spring you ordered to make sure you get the right one. Why dont you just use a MBC

Re: Wastegate springs...cdm springs
 

That's probably what they did, and I probably now have 2 yellow 3.63psi springs. I have been cranking up on the mbc...need to crank it more ;)

Re: Wastegate springs...cdm springs
 

Do what WTF said by using air pressure to test it.

Hook up a blowgun/nozzle to the air compressor, from there have rubber hose going to the wastegate, just 'T' in you boost guage and put it right next the the wastegate, slowly push/release air and watch them both.

Re: Wastegate springs...cdm springs
 

ya i think that would work good if you have a way to control the air without letting to much out at once, i never got that far i said ---- it and ran it anyways

Re: Wastegate springs...cdm springs
 

I'm not even going to bother. I fixed my issue with a nice spring loaded one-way pcv valve (some solid metal peice too, very nice ;D) and now I can crank on it a bit more without having the increased vaccum load open my wastegate all the way at idle and part throttle. I took it to 8psi today, and I'm happy with it so I'll probably leave it at that. The car is going to do more auto-x action than anything these days, so moster amounts of power aren't really needed. Besides, it still makes my '04 wrx seem like a neon off the line and up through 4th gear ;D