This is why...hayasa said:OK, but read this. This is why I was asking for a second opinion:
Yeah, that is actually what he is saying. You will need an aftermarket form of boost control to achieve stock boost levels after porting the wastegate.staticx313 said:??? That doesnt make any sense. All you are doing (as long as you dont OVERPORT - causing leaks) is expanding the wastegate port, so that all the exhaust can flow out. If you make it bigger... psi would go down before it goes up.... I had to turn my SBC-ID spec 3 up because it wasnt overflowing and whatnot anymore. It runs 100x better now. You shouldnt need a boost controller as you #1 wont be overboosting, #2 you're gaining space and you're still flowing the same amount of exhaust so you shouldnt underboost... just make sure he does it right and doesnt overport (causing leakage). Good luck!
Unless you've proven this by running the stock exhaust with a ported wastegate (that is what we are talking about here) I stand by my previous statement.blueballs said:Nope, not true. After my wastegate port, levels are back to stock. If the ECU monitors boost via a vaccum, it reads the amount of boost running in your car - hence that is how your ECU knows when to cut the fuel. If it has a specific preprogrammed map, it should be able to adjust the wastegate position from fully open to fully closed depending on the amount of boost it sees to fit the stock boost levels.
Now unless you port the wastegate so much that it's flow characteristics are beyond that of the stock map, you may have problems keeping the boost level up since the flow characteristics have changed drastically and will need a BC.
I'm not a car guru, but based on what I've researched and my own port job, needing a boost controller for a 'properly' ported wastegate isn't necessary.
You will want a controller anyway.hayasa said:Just found someone to port my wastegate, but he mentioned that you must have some sort of boost controller running to control boost levels. Has anyone ported and NOT used a boost controller?
Thank you for the info.ChargedPerformance said:The boost solenoid map is a closed loop with feedback. A properly ported exhaust housing will not prevent the OEM control from reaching appropriate boost - without regard to exhaust mods. The solenoid will be open and the wastegate closed until the target feedback is reached. A freer flowing wastegate path does not reduce boost if the wastegate still closes properly. If a port is not reaching full boost under OEM control it is because the wastegate flapper is no longer is sealing completely - i.e. it was over ported.