Hey guys, getting pretty fed up with the fuel cut going WOT at 5k, so I've been doing some looking around and research and my question is;

If I were to slap on a BNR stage 1, should I get the supporting fuel mods such as injectors, fuel pump and Rtek? Right now the only mods I have are an HKS intake and a Racing Beat exhaust (not sure if it's a Rev-TII, calling the OO when he gets home from work later today).
If yes, would the following cut it?
Walbro 255lph pump
Rtek chip (not sure what version yet, still need to look into it more)
and 720 secondaries or all around?

I don't want to go standalone due to the fact that I live in a fairly remote town with not a whole lot of "proffesional tuners" (if any at all) within the province. But I don't think most of this will be necessary due to the fact I'm not even looking to create power, just to fix fuel cut.

I have done some searching and I just wanted to check on some of this stuff. I'll keep searching/researching for now though.

 

Walbro, 4x 720cc injectors and Rtek stage 2 (programmable version). An Rtek 1.8 (set for 4x 720s) will only be "safe" if boost levels are kept moderate. I would not go running 14.7psi on a stage one, as the timing and fuel maps are not setup for it in the 5-7k RPM range. Something like maybe 10psi or less could be ok, but you still would need a wideband at the very least to monitor it.

 

Yeah I don't plan to run boost that high, the reason I'm only going for the stage one is mainly to eliminate fuel cut and the larger compressor wheel is an added bonus. I know I can just port the wastegate, but I don't really want to go through the trouble because I don't have the time or the expertise.
So I will need all the supporting mods if I upgrade to a Stage 1?
Thanks for the quick response too.

 

Why don't you just buy an Rtek 2.1. It has fuel cut elimination and a bunch of other good stuff. Then later you could get the BNR and go big. I would also recommend that you port your WG if you are on the S4 manifold, it is just puny. I had my WG done at a machine shop, took few hours, but I didn't want to do mine either.

 

Definitely would need to port the wastegate if you end up keeping your turbo. I also have the rb rev tii system and even just that mod to a stock car equals boost creep. And my wastegate was already ported.

My advice is if you have a limited budget, get an s5 turbo.

 

1sweet:

I'm guessing the fuel cut is there for a reason (to pre-vent over boosting I think), so wouldn't it be a bad idea to eliminate fuel cut electronically instead of physically enabling it to run on slightly more boost?
I may go big, but for now I want to keep the car relatively stock because it's my first car and I'm only 16. There's no need for me to be pushing 300 whp in high school. It's an S5 too.
Thanks for the input, I'll keep it in mind though for sure.

Travis:

Already have an S5 but yeah, I do have limited budget as of now, which is why I want to see if I really do need all the supporting mods with a stage one.

 

The fuel cut acts as a barrier. The stock injectors can't handle that much more power over stock boost. So driving as of now, fuel cut is dangerous to your motor.

 

Well I have never used just a fuel cut defenser before, but I know a lot do and still run. I would get the 2.1 with 720 secondaries and call it a day. Then later you could go bigger, and you would have a good start.

 

Sounds good, thanks for the help guys.

 

I believe he has an s5 which means only the RTEK 1.5,1.7,or 1.8 ECUs are available.
http://www.pocketlogger.com/index.ph...age=1&ecu=S5T2

 

Yeah I was just looking through, and I guess I'll be going with a 1.7

 

Your fuel cut is bad for the engine in the long run. In the short run it has done it's job and saved you from a blown engine. Remove the fuel cut last. Until you do the fuel mods, don't remove the fuel cut.

 

Keep the stock turbo, and look into porting the wastegate before anything else. There's a writeup here: http://fc3spro.com/TECH/HOWTO/KWG/kwg.html, but you'd probably be more comfortable having a shop do it. Being able to control the boost level is probably the most important thing on a turbo car.

Then go with the Rtek 1.7 or 1.8 & 2x/4x 720cc injectors, and a walbro. With these, you can take the boost up to ~12psi and have plenty of power. If you have the cash available, get a wideband 02 sensor to go with it, so you can know the mixture is safe as well. It's nice insurance; even if you're using a tried-and-true setup.

 

I recently put on a 3 inch turbo-back and i too occasionally hit fuel cut. I was thinking of running 550cc/1600cc on my Rtek 1.7 until i can get my standalone and a ported wastegate S5 turbo

 

Is it just me or is FC3Spro "temporarily down" for the past few weeks? I remember seeing some nice stuff on there last time I could get on and every time I go to look for something on there, the server says it's temp down.

 

Without an safc that's not doable. Unless you just forgot to mention that? The transitioning from 550cc to 1600cc will probly be very harsh. Rtek 2.1 eliminates that.

I wouldn't want to tune 1600cc on an safc personally.... Rtek 2.1 or standalone.

 

Well i didnt know it would be that bad. I guess i didnt put enought though into but that makes sense. I am looking to get a standalone right now but will probably end up with a new Platium Series Haltech

 

The Rtek 2.1 can't compensate for 1600cc injectors. The max fuel correction is +/- 37%, which means the largest size you can use is 1000cc (preset @ 720cc). You need a 122% correction for 1600s! Ouch. Standalone only. Besides, four 1000cc injectors would be good for what...600 whp?