i have a 89 turbo2 i now have a upgraded turbo and was wondering what the best ems is for my car, also how should i upgrade my fuel, i am a newbie at this car, should i put a walbro pump, with like 660cc primaries and 1000cc secondaries or what i have no clue what type of injectors i should get or anything please help me maximize my engines potential

 

you may want to do some searches! but more than likely with an upgraded turbo you are going to need a new fuel pump also rewired (search) and depending on what psi you run your going to need an fcd also larger injectors. The injector size is dependent on how big your turbo upgrade is. Also you are going to need a fmic because the stock top mount heat soaks and causes detonation. I would also recomend getting and safc to controll the fuel along with some sort of wide band to tune your car.

 

It all depends on how much money you want to throw at the car.

Haltech's and Microtech's can be had for around a grand complete. I paid around 700 bucks for a used Haltech E6-K for my car that works very well. You'll pay a bit more for the newer versions.

However, the BEST computer i've seen yet is the Autronic SMC.. Its injector drivers are the bomb, and its tuneability is fantastic. Also, the Autotune feature for rotary applications should be out in a month or two. But Autronics are about twice as expensive as the aformentioned ECU's.

Fuel System: I'm planning on running 720 primaries and 1000 secondaries, currently, I have the stock 550 primaries and 1600 secondaries. (this is the cheaper way to go, but not necessarily the best)

What you DO want to make sure of is that you use the SAME type of injectors. If you keep your stock 550's for the primary injectors, you will want to get LOW IMPEDANCE secondaries because the s5 stock injectors are low impedance.

check out www.injector.com our cars use the "japanese" style injectors in the stock rails

Get the walbro 255 fuel pump, the stock one isn't going to hold up to your fuel needs.