tial wastegates

[Like A Golf But....]

hi, i got a tubular manifold and it came with a tial wastegate fitted......

 

I only really wanted the manifold but being it was on it. i decided to keep,and run the external wastegate. Thing is, i have got a clue on how they work, or how you plumb them in. Ive got a greddy profec b boost controller too as i was told i would need one.....

 

 

 

after trying to look into it a bit more, i see you need to change springs for different pressures etc.......

 

 

 

i havent opened it up to see what spring is in it.....

 

 

 

 

 

could someone please show me pics so i can understand them a bit better..... and explain what goes where?

 

 

 

also,being my car will need running in when its fully restored, how do i go around setting this up to accomodate this(i.e what spring will i need etc)

 

eventually after running in, i will want to run a maximum of 20 psi boost pressure so will i need to chane the spring again to accomodate this?

 

 

 

 

 

what benefits do you get running an external wastegate? as im starting to think i made a mistake going this route

 

 

 

 

 

any help would be great

[rallyesport04]

what engine setup you goin for???

[PIG]

running the external waste gate is a pain in the arse imo,i run one on my mk2 cossie escort and the money,time and genral fooking around is pointless unless you are running huge horse power again imo.what management you using?once running(if it runs) get it mapped straight away before you start giving it some as well.

the downpipe etc i made

[bmxdave]

You probably dont need to change the spring rate if your using a boost controller. The boost controller adjusts the signal to the actuator that is coming from the ECU, so the spring pressure isnt necesarily relevant to boost pressure.

 

As far as im aware you set up the wastegate as you would any normal wastegate, the only difference of course is that the wastegate is external to the turbo and not mounted on it.

 

External wastegates are great for reducing boost creep and they give give better boost control. They of course sound epic too if vented to atmosphere. Theyre not really needed though unless you making big power and high boost pressures.

 

What turbo are you using? If it has an internal wastegate you can just blank off the space for the external gate and use the original internal gate.

[turnover]

as above but if you only want to run 20psi ,you wont see much advantage,just try the spring you have as it will probably be easy to control through your boost controller,some times you have to run a softer spring or harder depending on how your boost controller performs,but if your going for big power at a later date then leave it on

[Like A Golf But....]

Hi, thanks for all your replys. The engine is a zetec 16v lump with forged pistons,steel rods, balanced/shotpeened crank etc and ha ent quite fi alised the spec of the head yet. The turbo im using is a hybrid gt28/t34 turbo with internal wastegate. For the time being i will be running. Approx 18-20 psi boost which will see me @ around 320bhp which should be plenty in a mk1 fiesta. But the bottom end will be good for over 400,turbos good for up to nearly 400 so i might up it in the future. Just seems quite alot of agro:(

How can i see what spring is in it? How can you tell what strength it is?

 

Also, ive run the external wastegates vent back into theexhaust system, so will it sound no different to an internal one now? Was thinking it would be too loud for track use..