I'm sure this has been beaten to death, but all of my searching has lead me find conflicting info and a lot of people that shouldn't be allowed to post nuts: NABISCO). To prevent boost creep and gain a quicker spool I'm researching porting my wastegate. My concerns: 1) Porting a wastegate changes the amount of flow being released - the ECU would therefore need to be calibrated to the new size hole. Cobb's OTS maps aren't going to be calibrated. Will the ECU adapt, or will I need to tune to make this right? Is it possible to calibrate the wastegate duty cycle with via Protune? 2) Some say remove material from different places - shouldn't it be BOTH of these? (I totally ripped this picture off and added to it. :naughty: ) 3) On a 2.0 with a 3" TBE, is this something I'm even going to want to do?! Is it worth my time?
if the turbo is already off the car then go ahead and port it even if you are on a 2.0 block. if you are on a 2.0 block you are going to have to need a tune anyway, but it isnt required if you are running a ported turbo on an sti.
I plan to run on the Cobb vf34 map for a while until I can make it to SOG. I had seen instances in NABISCO where people claimed that you couldn't tune WG duty cycle with Cobb... That and the conflict about what/where to port is the reason for this thread.
People on NASIOC are full of it... you HAVE to be able to tune WGDC to tune boost. Don't sweat it, a ProTune will handle it.
if the turbo is comming off anyways, it will be a fun project. And yes, you should remove material from both places what kind of dremel bits is best for this application? I'm also trying to port something that's cast iron and so far it seems dremel method is too slow, any advice? Perhaps moving onto air tools...if so what kind of bits, carbide bits? And then a metal brush to smooth over the surface?