Can I run 720cc secondaries on my s5 motor with just a fuel controller to adjust afr. I have an innovate wideband to help suss it out. Or do i need to go full stand alone ecu. Installing a deatschwerks 300 has an fd pump currently. Have a tomei reg. 3" exhaust to 2.5" y. Greddy style front mount kit. Hks bov. No emissions. Turbosmart manual boost controller. Boost cut defender. Thats about it i think. Need to pull off turbo and port gate. Want to run 10 - maybe 12psi. If any of this info matters

 

Asking for so much trouble with a mbc and fcd...

 

Rtek 1.7, you don't need a fcd. Also pulls 1 deg of timing above 9psi.

http://pocketlogger.com/?pid=rtek7&t...age=1&ecu=S5T2

 

Sorry should have mentioned, car is an 87.5 series 4 not series 5 but running s5 motor and I'm in New Zealand.

 

with the stock ECU you need to be careful that you don't run too much boost, as the timing starts to become aggressive. it also runs out of fuel, hence the injectors.

2x720 works ok, and here is why.

the car had 200hp stock, and with a 3" exhaust and IC you have probably added 50 more HP, which is around 20%.

2x550 and 2x720 injectors are only 11% bigger than 4x550's.

so net/net is that you dont need much to control the larger injectors, in fact you may not need anything.

i ran a similar combo a few years ago, and it was a little rich but ok. i used Fcon+GCC to control it, and i wasn't really even using either one, Fcon was on like 1, and GCC was flat, next step was going to be a T4 but someone offered me a lot of money for the car....

 

Maybe I nut up and install the microtech lt10s I have in a box. Have it completely remapped as it has a tune for Bridgeport turbo on there. Will mean the 7 stays off the road longer but safer in the long run and set up for later additions. Is it possible to put it back to standard 13b turbo map it would have started its life with.

 

not unless someone gave you a dongle with the stock map loaded onto it, the microtech can only hold one map at a time. you gotta do it manually otherwise.

 

What Stock ECU are you using/do you have? Forum member turbo2liter can possibly answer any compatibility questions you might have. RTEK is for S4 and S5.

Good luck!

 

I'll have to check the ecu when I get home can't remember off hand other that it's the s4 ecu for the car but mines the s4 with high impedence injectors if that helps. But good to know. Thought the Rtek was s5 only for some reason.

 

Nope ecu sticker is well gone now. But 87.5 tii auto (manual now)