question about the spring in the wastegate

[notadsm]

i have a honda civic that i am putting a 2g eclipse turbo on. The block is farely stock on the engine so i don't wanna run anything over 5 or 6 psi till i build up the block. A friend told me the wastegate is set somewhere around 10-12 psi on the turbo, could i just replace the spring in the wastegate with a smaller TIAL spring to lower it down to around 5 psi?? also if i can do this what size is the wastegate to make ordering the spring easier?

 

[DrZiplok]

The stock DSM wastegate actuator does not have a replaceable spring, so you can't do this.

You're going to need to find a comparable wastegate actuator with a lower actuating pressure; you could probably get one of the Garrett ones to bolt up with some custom bracket work, although I believe they pull rather than push so it won't be in the stock location.

You might try attaching a boost gauge and bike pump to the stock actuator to see where it does actually open...

 

[notadsm]

man that sucks, i'll prolly end up just gettin an actuator off a different car then. do the actuators have to match up with certain turbos or could i use any actuator off another car with my turbo?

 

[Bohrn]

not very many stock actuators will go that low and be adjustable. Maybe a mid 80s 300zx Turbo??

But fitting it up will be custom work no matter what you do. Your car is not supposed to be turbo. If you buy a kit for your application, it should have all you need tho, but if you are just going to try and make a Garret t-25 fit on your Honda, you are gonna need alot of knowledge, money, and parts. Not to mention time.

best of luck.

 

[notadsm]

yeah this is gonna take some time and all, i'm doin the home made turbo that some people do.. i guess i'll build up the bottom end then so it can handle the turbo