carb spring wastegate actuator
 

i've heard some people using carb springs as actuator arms, i like the idea of it failing in the open position instead of overboosting. can anybody give me an exact part number or something i should use to find it? or at least a rough idea of how strong it needs to be? i was originally going to go with the IWG's 8psi, but i need to clock the turbo to run my intake piping, and since i'm still using the d15b7 i'd like to set her back to around 5-6psi. just til i drop in my z6. that'd make it easy to change spring weights, and uberdata automatically adjusts to different pressures since it uses the map signal to control fuel/ign.

Re: carb spring wastegate actuator
 

dont do it, it sucks. When there is less exhaust (half throttle), the psi will be higher, and then at full throttle it will drop.

Re: carb spring wastegate actuator
 

what's the best way to do it?

Re: carb spring wastegate actuator
 

use an actual wg actuator ;)

Re: carb spring wastegate actuator
 

http://www.we-todd-did-racing.com/we...MXk1NDE%3D.jpg

is this what your talkin about? its a simple chain, and spring. i use it everyday! it holds boost pretty steady, and beyond belief if works. its a tempary thing though. also, boostcut is a great peice of mind. ;)

Re: carb spring wastegate actuator
 

why worry about boost cut (even though i'm enabling it to be safe)? if it fails, its gonna fail in the open position. yeah thats what i was talking about, only i wasnt thinking about using the chain. just one big spring or 2 separate springs. it seems like a pretty good idea, using exhaust pressure to open the wastegate flapper...

Re: carb spring wastegate actuator
 

its pretty uncontrolable. like i said, it works, but i wouldnt want to use it all the time. if you want to up the boost, just tighten the spring. :)

and heat from the turbo heats the spring up loosing tension, which in turn opens the WG a little sooner. :-\