Hiya all, I want to fit an external wastegate to my 2wd cossie but i want to use my stage3 t34 is this possible? i sort of know these bits i.e change exhaust housing,weld wastegate pipe work. But what size wastegate do i need atm its running 380bhp@27psi, Help would be much appreciated.

 

Hi there u'll ned to hold ur penny flap shut on your internal wastegate and tap into the swan neck and as you said weld on the flanges for the wastegate. you also need to find a way to re route the vented boost back into the exhaust system further down or you could do as i have and run a screamer pipe . (loud) as for size u'l be fine with 40mm i would think. i also run a t34 with 40mm external and it's a nice set up .




sorry bout the pic quality
Cheers Ally

 

How loud are these screamer pipes, from the description I assume mega loud ?
tabetha

 

mines ear poping loud

 

mines not that bad i don't think . loud enough to put this shits up old ladys and dick head teens that walk out infront of ya

 

Cheers Saph Al, i only have a .55 housing though so would a 35mm wastegate do?

 

Yeah sould be fine would try and get a 38 or 40 but no reason why it souldn't do the job. pm me if u want any close up pics or info Cheers Ally

 

With the penny flap how did you go about sorting that out? ie hold it shut then weld it inside? does it need to be sealed tightly? or just shut and weld it from outside? sorry for the silly questions but if im going to do it i want to do it right, i was ready to change the housing but you have just saved me lol

 

Well theres a few ways of shuttin it . yes it has to be a tight seal so the first way is to simply use an actuator with the adjuster rod wound in all the way so its tight and dont connect the vac pipe , therefore it will just act as a stopper . second is to use a piece of threaded bar to again hold the flap shut tigh . and the third is to weld it shut thus being able to remove all trace of the internal gate bar the penny flap which MUST stay in and remain tightly shut . Cheers Ally

 

Ally your a star mate its going to cost me now sod all to do this as i have the wastegate and a spare manifold haha, i thought i had to get a flange to shut it all off etc etc thanks again mate, John

 

No worries chap as i said if ya get stuck and want pics or any info just drop me a pm
Cheers Ally