Hi I have a pretty much stock fd with intercooler and apexi intake anyways I am wanting to install a mid pipe and I know I need a power fc and boost controller but do I need to port turbo wastegate hole?

 

Technically, if you keep the boost to stock level, you don't even need a pfc.
I have full exhaust and an intake with boost controller.
I changed the ecu to pfc because I found a good deal.

 

Removing the main cat removes a lot of restriction. With the factory boost control, you will have boost spikes and boost creep with a mid pipe. Porting the wastegate will stop boost creep, and a boost controller will stop boost spike. Under 10 psi on the stock ECU is fine. Some have had success removing the pills from the turbo wastegate/pre control lines and running off spring pressure, but that's just a work around. A PFC tuned for the extra boost is a better option

Matt

 

^Second. A boost controller does nothing for boost CREEP. Only porting the wastegate or retaining some backpressure wards it off on the twins.

 

I have a PFS downpipe and muffler and just recently installed a RX7Store resonated midpipe. I was worried I would experience boost creep so I installed a 2.5" restrictor plate in the exhaust. So far I've been fine. I also have a Pettit ECU and run ~12psi. YMMV though...

 

Doesn't adding a restrictive plate defeat the purpose of a mid pipe? I have power fc just not installed, I'm going to pull engine and trans out and fix trans grind and clutch and take turbos off and rework them. If I want to bump up psi to 14 psi do I need to install bigger injectors or is there enough tune ability. I have kj parts rails and regulator just don't like injectors I have on rails.

 

You will have issues controlling boost in cool weather. There will be very little power gain at your modification level by removing the catalytic converter. You will see more gains from a proper tune. If you do go with a midpipe, you will need to remove the turbos and port the wategate. It takes more than just making the hole larger. It needs to be matched to the flapper as well as the wastegate runner smoothed to help exhaust flow to the wategate. People run the restrictor plate as a bandaid. I use them on cars that are near stock but the original catalytic converter has failed, so I go with a high flow unit that is more affordable and add a restrictor plate to prevent overboosting. Remember that removing the restrictor plate later on will throw off the entire tune.

14 psi is too much boost for the stock fuel system to keep up. Yes people have done it, but running the injectors at or near 100% duty cycle is not safe. Generally when we tune cars in house we do not go past 12 psi on the stock fuel system. You always want to leave headroom in case of a boost spike or drastic weather change.

 

Ok, appreciate the info, I am going to get a tune done but I have some more reading to do haha, but I think I am going to get some Bosch ev14 injectors.
Thanks