this is my new turbo setup for my 03 lancer oz rally that i obviously have turboed. thing is tho that i have a TiAL external 38mm wastegate that i would like to use instead of a factory one. i am a cad designer and work at a machine shop and a certified welder so all that is no problem, its just finding the best location for it. i know to put it as close to the collector and off of the #1 or #4 runners.

if yur running an external please snap a pic and post it to help me out if you have one.

thanks
josh

 

With the divided housing, I would consider moving it down onto the turbine housing if you only want to use 1 gate. Keep the pulses divided all the way up to the valve face.

Otherwise, pick up another gate.

 

thats the other thing i was thinking of doing kinda like the map performance one that they have but obviously use my 38mm wg since i already got it. if i do that tho how/what do i do to the factory flapper?


josh

 

Take it out and weld up the hole from the flapper shaft. Might even get away with a pressed in bushing if you are reluctant to weld on cast iron.

I've been considering doing a setup like this, but the interface between the wastegate port and the housing has me a little concerned. Butt the two together when cold and when it gets hot, it will likely induce tremendous thermal stress and lead to cracking in the housing?

Leave a gap and hope it gets close to sealing up while at operating temps?

Come up with some kind of interface that allows expansion while still providing a seal?

 

this is how i did mine... im stock turbo with a 38mm external wastegate... prepare to get flamed for trying this though... but my cars holds 28lbs to redline now so boo yaa to all those running factory wastegate dropping to 21 at redline haha
https://www.evolutionm.net/forums/ev...ock-turbo.html

 

so thats basically off the #2 runner right from what i can see? how does that effect the pulses tho?


josh

 

nope off both collectiong chambers, not sure which runners its on but what i did was make a Y pipe that connects both collection chambers of the exhaust mani and makes channels it to a single outlet that runs to the wastegate

 

the absolute best way would be to do it like revmoto did his set up... search for his name and his ewg set up!

 

thats a nice setup as well i was toying with that idea last nite as well just doing a total custom plate for the wastegate off the hotside like that.

now its time to work on it in solidworks and start my 3d model.


josh

 

make sure you take lots of pics along the way to show how you did it !!

 

will do as well as posting my solidworks designs in order toplay around with stuff before i go and fabricate

 

solidworks update....



evo 8 flange in. now its ontothe runners and the 4g94 flange for my engine.


josh

 

haha off to a good start amazing what you can do with cad... im in college now studying to become a civil engineer, autocad is my best friend haha

 

try solidworks, SSSSSSSSSOOOOOOOOOOOOOO much easier. i dont even use AutoCAD any more. i can do everything in solidworks, well that and it helps that im more mechanically inclined on building and designing things. that mechanical engineering degree will be mine someday.....


josh

 

ooo niceee ill have to try that out then! thanks