I have been thinking that I want to upgrade my turbo. I am currently running a BNR stage 1 which is a stock turbo with To4b wheel and clipped turbine. The Rtek 2.0 has worked great with this turbo and after pulling some timing from the high load area there is still room with fuel. I'm running 4x720's.


I was thinking of trying out a to4e 57trim with a .84 A/R. Its on the small side but I want to keep some response and I'm only looking for around 350 horsepower at the most. If anything I can upgrade the secondaries to 890's if I need more fuel.


I wanted to see soome thoughts on this and hopefully there are some people with some experience running a full turbo upgrade with the RTEK 2.0


I'm making 295 horse to the wheels now with the hybrid on stock ports.

Looking at different logs the highest injector D/C was 50.02 and that was at 11.0 psi.

 

I dont know of anyone on a full T4 with an RTEK, but thats not to say it wont work.

350 Wheel would require that turbo to be in the 18-19ish range and is working it pretty hard. Not a problem if you do a adequate IC setup to cool that air.

 

I'm running the Greddy front mount right now it should be able to handle something like that I would think? What would be a better turbo to make around 350 horse on stock ports at lower boost pressures like say 12-14psi?


I've been looking around for more info on that turbo and I have seen a dyno sheet and it was 338 horse at 10psi, but it was on a ported motor and S6 rotors and housings. Posted by C.Ludwig.

 

According to the map I found, if that WAS possible (338 @ 10PSI), it would be way to the right of the map, which isnt where you want to be...

 

What would be a better pump gas turbo with stock ports that would be able to do 350 horse to the wheels with as little lag as possible with around 12-14psi of boost?


I drive this car daily and I would love to see what the car can do with a full turbo upgrade. I would definetly be taking the car to the dyno and do some low boost runs first and slowly go up from there. Probably start around 6-8psi.



Edit: So far the only upgraded turbo's I have seen on the RTEK from just a quick search have been the BNR turbo's.


But I would think that the car can take better advantage of the better ehaust housing that are out there with a full T4 turbo.

 

T04B 60-1"Hifi" with a 0.84 hotside. It's a name "coined" by Turbonetics and all it is is a "60-1/P-trim" with a T04B 0.60 compressor cover.It has about 95% of the flow of the full 0.7A/R T04S compressor cover but with a little better response from the smaller cover.This would be it if you are looking for a great response street turbo and should make over 350rwhp at 1bar.

 

That dyno you posted is of my car. It is street ported, S6 housings with a T04E 57Trim I can run 87 all day fine and it still runs strong. I daily drive mine also. The spool up is pretty good, 4-5k range full boost.

EDIT: oh yeah but i run a haltech e6k with 680cc P and 1680 cc seconds.

 

I'll have to do more looking around, but thanks for the info so far.


I just hate the search function on here. Its like hit or miss and you have to have the right words or it just throws them away.

 

My current setup is a T04B with P trim and a FMIC with S-AFC for fuel control. With stock primaries and 720 secondaries I was able to put 298 h.p down @ 8 psi. but that's all those injectors can do. In the next couple of weeks I'm moving the 720's to the primaries and putting in 1000's for the secondaries. Shooting for about 350-375 hp @ around 14 psi. Oh and I get full boost about 4500-5000 RPM.

 

^What is the A/R on that turbo? On stock ports?

 

I'll have to check when I get home tonight I don't remember off the top of my head. S4 TII engine with a stage 2 street port.

 

I've never seen a definitive answer on what the max hp is of the stock AFM. Everyone says it's a big restriction but I've never seen it quantified.

 

You can do over 400rwhp on the stock afm, it just isn't ideal. I've ran those power levels on the 1.7 with a full to4. Again not the right way to do it, but it can be done..

 

^Even with the timing control of the 2.0? I know they are planning to release an update to where the timing control is MAP based and not AFM.

 

If you have more control over timing with 2.0( been a while since i've spoke with Rtek ppl) then it should be ok. If you're looking for low hp levels I'm sure you'll be fine.

P.S. turbine a/r won't affect boosthreshold,

 

Are you talking about boost in relation to pump gas? Or making a certain amount of boost at a certain RPM? Can you please clarify for me? Its late at night and this quote got me a little confused for some reason. LoL..

Max boost before preignition or detonation?

 

Ah, never ming about the Threshold . I did some reading around last night and I have a better understanding of it.


Boost threshold is at what RPM there is positive pressure coming from the compressor. Boost threshold is different than lag. Turbos with larger A/R's lag more, but boost threshold isn't affected.