I have a quick question.

Some of the mods mentioned in the thread I have completed already some I havent. My question is, if I replace/upgrade my secondaries and/or fuel pump when I really didnt need to, will my FD not run correctly? Or is it one of those things that is basically overkill but Ill have the resources if needed later on?

My mods:
slightly modified airbox
DP
CB
PFC

Im running the stock map.

 

The fuel pump will ensure that the fuel is there when needed, but won't hurt if not needed. The injectors however will absulutely affect how the car runs. You need some way to control how much fuel you are getting (a programmable ECU). For instance if you have 850 secondaries, and put in 1250's, you are adding about 50% more fuel. The stock ECU has a pre-determinded pulse width when the secondaries are active. So if you put larger injectors on you will get more fuel, in this case 50% more. The larger injectors can still be utilized, you just need a way to "Dial in" the exact amount of fuel you need.

Jason.

 

3rdgenluvr, if you have a Power FC then you can run upgraded secondaries with no problems. You just have to program the computer to do it. All it takes is changing the injector size in the menu, and then you have to alter the timing split maps. There is more information in the powerFC threads, and people that can help you with the maps.

eric

 

If you are open to going single, the A'PEXi RX6 kit spools almost as quickly as the stock turbos, and gives a boost in power over the stock setup from 3700 on up. This is especially evident in the 3700-4500 range when the stock primary is struggling to keep up with your modded engine. On my car, the RX6 was good for a 50HP boost over the stock setup at 4500 RPM. Without a boost controller (manifold pressure directly connected to the wastegate) it starts to make boost at 2000-2100 RPM and gets up to 10 psi by about 2700-2800 RPM. After I put it on, my impression was that it could have a whole lot more lag and it wouldn't bother me. One thing that drives that perception is that the 4500 transition point is gone, so you don't really care about revving it through that range like you do with the stock turbos.

If you really want a reliable 350 RWHP car, single turbo seems to be the best way to go.

I attached a spreadsheet with dyno numbers from my car before and after my RX6 install. For both runs, the boost control is pretty messed up, but it does give you an idea of how each setup performs.