rtek 1.7 or hks fcd
 

i have a 87 turbo want more boost so what would be better.. to send my ecu off to rtek and have them put a chip in or just buy a fcd ?

How much more boost?

What are the modifications done to the car so far?

john ny

RTEK 1.7 if you have the upgraded injectors. More expensive though.

FCD without supporting mods is a bad idea.

Rtek 1.5 with stock injectors. FCDs fool the ECU with fake pressure data. No thanks.

i have 255 fuel pump and bigger injectors on the way....and not much higher i really only want 15 psi for right now

wat size injectors?

if it more than 720cc secondarys you be fine with the rtek7 1.7

bro... seriously stop.... microtech, find it anywhere on the forum for avrg. $500 used lt8 and a STABLE fuel system, not just a 255 and injectors will cut it, you'll need proper plumbing and a fpr as well. dont bug the ecu unless you in FACT know how to run electronics (or at all). iv worked on many fuck ups and had to trouble shoot idiots cars who "know" how things work... just a tip and fair warning bro. research your ass off there is many other options at lower costs and maybe safer to mod a rotary for more boost.

another thing iv delt with rtek and seriously its trash. your better off with a safc, walbro, fpr, upgraded plumbing and 850 cc 2nd's injectors, its more flexible when you start to add on to your set up.


take it as you wish, iv seen, built, researched and delt with many set ups. ALL JUST A PERSONAL OPINION.

Remember the FCD screws up the stock boost gauge. Thats not a big deal but it is annoying. I say get the rtek. Run it for whatever injectors you have now, then for $15 get a new chip IF you need to change to the other injectors.

How are you going to handle getting more fuel it the engine @15 psi?

Are you still running your stock turbo? What are your power goals? Or do you not care and just want to boost 15psi?

The guy's talking about simply running more boost on the stock turbo. Why over complicate it with a standalone? That's ridiculously overkill, and will cost much more than $500 including dyno time, etc... For this kind of setup, the simple Rtek chipped ECUs are far more than adequate, and are 10x better than an SAFC and an FCD to compensate w/ bigger injectors and fuel cut. Both of those devices trick the ECU and lead to unwanted timing changes.

i have power goals.. i would like to have around 450hp.. and i oder 720cc injecters ...all i really have done is new suspension and lowered walbro 255 pump front mount on the way . and planin on sending the motor off to get it rebuilt and sp

You still didn't say how you plan to controll more fuel. The 1.x series of Rtek just keep the stock levels with the different size injectors. You will still need to us a SAFC or simmiler to tune or you will still run rich.

If you have an SAFC already, great. If not i strongly suggest looking into the Rtek 2.x series (unless it;s an S5 in which case you are boned) or as stated above some other controler.

15psi+no way to control fuel =BANG! Rebuild

it a s4 block with s5 internals and safc i dont have it but will look in it

also do you have a S4 turbo or a S5 turbo also is it ported? If not you might creep/ will creep.

Rtek 1.7 does NOT change the fuel map
you will STILL run lean even with the 1.7, if you dont have an actual way of changing the fuel map

either get the rtek 2.x

or a fuel pump, fcd, and a f-con or equiv


if you are sticking with the stock turbo - the easiest way is just get a f-con and a fcd.
You have a pretuned safe map, an amount of adjustability to the map, a gcc can be had for 100 more and you wil have full tunability, not to mention f-con with fcd are only around 150. it will be much safer than the rtek - as rtek 1.x have no control over the fuel map.

And dont bother with safc or any of that crap. unless you have a wideband and hours of tuning it, or have access to a dyno, it is completely useless with a fancy display.

I am running the R-Tek 1.7, and they do change the fuel and timing. I am very happy with the R-tek. At full boost, wide open throttle, my air/fuel stays in the low 12s. You can't go over 14.7 psi on the stock map sensor though. To reach 400 plus, you'll never reach that with the stock turbo. I am running a T04E at 14 psi with the R-Tek, and I am barely over 300 rwhp. You need to do a little more research on what it actually takes to reach that kind of hp. You will never do it on the stock apex seals either.

yea im still runnin stock turbo ... and since there so many opinions what about the rtek 2.1 it have everything in it.

bad 83 ,,wats your secondary injectors? if u dont mind telling

and f-con they dont make the contectors for my model and ..that would be better than rtek?

You have an 87.

Get an Rtek 2.0, end of story.

yea, since you are an S4, you might as well get the Rtek 2.1

Im still waiting for a stage 2 for the s5 :(

I'm running 720s. Since I have been running the R-Tek, the car boost so much better and harder now. Runs smoother, and transistions the secondarys in better. The only negetive thing that I have noticed with the R-Tek, is the car is harder to start when cold.

how bout 750 s secondards . with fcd.................and no rtek or fc .?????mods . 3 inch turbo back, no silincer. 12 psi. 1st thur. 3 rd . 14 4th and 5 th .thanks :}plz help!