Bolt On Twins Capable Of 600whp For Street?

[Sayajin]

Hey guys. Well I was initially looking at the Greddy T517z's for my twin turbo setup, but after some more research I discovered that this turbo will not be sufficient for my HP goals so I have to go back to the drawing board. I have been searching on the boards for info however not many people are looking to do what I am. Either they want 600+WHP for drag, or a 500+ Street Setup. Also I have looked at the turbo chart over and over, however as that only talks about HP and not responsiveness, that is not sufficient information.

Here is what I am looking for: A Twin Turbo bolt on setup capable of 600WHP however as I am looking for a street setup I also need it to be as responsive as possible with the least amount of lag. Now of course I know that with increased power comes increased lag, however I am trying to find out what turbo will be the ideal compromise. I also plan on keeping the stock 2.6L and not going stroked. I will however, have all of the necessary supporting mods. Since I am keeping the 2.6L that means I need a turbo that is also not prone to shuffle, which means that the HKS GT-RS is out of the questions as they are infamous for shuffle. Other than that I am open to suggestions. Also before anyone says to switch to a single setup, I have considered this and decided to stay with the twins. Now please keep in mind that this will be a street setup and not a drag setup when you make your suggestions. Thanks a lot for all of the help guys.

-Sayajin

[R33PWR]

Excuse me for my ignorance but would you mind telling me wat shuffle is all about.

[r33_racer]

turbos providing more air then the engine can ingest, so it does a u banger back to the turbo/s

Edited September 21, 2006 by r33_racer

[nfi]

The reason I think you will find that the street setups are 500+ and the drag setups are 600+ is that there is no such thing as a responsive gtr wtih 600awhp.

There is no such thing as a magical setup that will have minimal lag and 600awhp. That sort of power means you aren't going to see full boost till after 5500rpm. If you want anything even remotely resembling what I would define as a street car you will need a 2.8 or ideally a 3.0l bottom end.

I think your only option to low mount and make that sort of power would be the big housing Trust T518z (10cm rear). This is going to be really laggy.

Also, when you refer to 'shuffle' I am guessing you are referring to compressor surge which is always going to be an issue when you have a big turbo/s. I know of a car that had a 2.6l bottom end with GTRS's and had no compressor surge. Its all in the timing. That car now has a 2.8l bottom end and its now not laggy and still doesn't get compressor surge. It did before it was tuned but does not anymore. It is all in the timing.

If I was you I would lower my power targets so the car will be a true street car. What your forgetting is that lag makes cars really slow on the street. If you aren't making full boost till >5500 you aren't going to be scaring anyone unless you dump it at 8000rpm in which case with that much power you are also going to smash the gearbox to pieces. If you don't launch it that hard you are going to go nowhere for the first 50 metres.

I think you will find you will enjoy your car a lot more with about 350awkw and have a car that is not laggy and not going to smash the gearbox.

Hope that helps.

[CruiseLiner]

1 t04z cheaper and easier than any twin setup with almost as good response as any of the low mount options twins are wayyyy over rated in my opinion for the bang for ya buck

simple design, heaps of engine bay room, easy to work on, one exhuast, one manifold, and one inlet pipe. oh and a nice external gate to upset the neighbours

Edited September 22, 2006 by CruiseLiner