as above, ive got a 2.0 zvh running a t3, i want to installe a external wastegate. Can anyone tell me how they control the boost, what needs to be connected to what etc. I shall be fabricating a bracket to hold the internal gate shut

any help would be great

 

ok, firstly why do you want to run an external wastegate?
secondly it's not so simple lol.
you'll need to cut a hole on the base of the erst manifold and weld a pipe into it before the turbo where all the pipes meet. then run this pipe off and fit a flange for the external wastegate, then a pipe out of this to feed back into the exhaust or just out of the engine bay to wherever.

a wastegate bleeds off exhaust gas this inturn reduces the flow of gas to the exhaust turbine in the turbo, this in turn reduces the boost. if the wastegate is closed it'll just keep spooling and producing big boost, but as a normal wastegate there is a feed off the boost pipes which opens the wastegate to limit the boost.
you vary how these work with varying spring rates in the unit and a boost contoller if you wish.

they are better than internal ones as they help the turbo flow better and react better to boost spikes etc.

p.s. welding steel to cast iron isn't easy and commonly fails due to the intense heat heeded and the slow cooling to make it stay intact and not crack later.

 

thanks for the reply,

I would only want one for the sound really of the screamer pipe, sad I know, but if its better boost control then it would be a bonus. I have found this adaptor on ebay which I though was a good idea as long as there was room to fit it
http://cgi.ebay.co.uk/Turbo-Adapter-...d=p3286.c0.m14

if it could fit it may be worth a go

 

what does a screemer pipe do is this where it flows the by passed exhaust gasses out to atmosphere and i guess there loud if ive worked it out to be correct

 

thats it mate, do a search on you tube and you will get the idea, I kow its sad but im into mt little boy racer sounds etc.lol

 

thats actually a nice adapter there..
Dont think its worth all the hassle though mate.
just get a straght through exhaust, that'll be loud

 

you'll stuggle to fit the adaptor in i reckon.
best to get a tubular manifold made, then it can be made better.

 

will have a think about it, I need to hear one in the flesh to see if its worth it though