Hi i am about to try to swap a 13b-rew into my fc and I really need your 3rd gen guys help. Ok it has the seq. twin turbo what is the main flaw of this system. And how exactly does it work. also what tyoe of engine managment are you sing and does it still reguire the use of the stock ecu and harness. Is there a way to run the engine with out the ecu and harness and off of a haltec or simular system.

This is my first dealings with a stand alone. I dont know to much about them Any help would be greatly appreciated.

 

a haltech would come with it's own harness that you'de have to wire up to the sensors.

the apexi power fc uses the stock harness and allows you to fully tune the car.

the sequential system has a lot of vacuum lines and many solenoids so that is the only flaw is that there's a bunch of things that could go wrong and its hard to diagnose when it does.
seq. works by the first turbo spooling up the 2nd until a certain point when they both come on together.

you may want to ask in the single turbo section or ecu forum if you're after info on just standalones

 

The turbos themselves generally work well. They are water cooled, and even though the manifolds crack it's usually not enough to affect performance until after the turbo cartridges themselves expire.

It's the control system that drives us nuts. Like SM said, there are many possible failure points, and most of them are susceptible to the intense heat generated by the turbos and engine. Solenoids, rubber vacuum lines galore, and sheer complexity. Most turbo 'problems' are in fact a failed part in the control system, and finding the failure can be tricky. Fortunately these kind of problems are usually fixed affordably by fixing that part, if you haven't lost your wallet yet in labor charges or lost your mind. (IMO, it's not stressful when you really get to know it, but there is a painful learning curve period)

To get an idea of how it actually works, see the two links at the bottom of this page:
http://www.davidgeesaman.com/