good street/track turbo with low boost?
 

I'm looking for a good turbo with little lag. So far the options are the apex rx6, or greddy td06-25G. I'm planning to street this once in a while with only 91 octane gas. What do i have to do to set this up properly? What type of injector sizes should I use? I've noticed that the apex kit doesn't come with a blow off valve, anyone with this kit do anything about it or just leave it without a blow off valve? i'm only going to boost 11-12 psi on street, and 14 on the track with race gas. I'm wondering what type of horsepower figures I can get with that type of boost?

The A'PEXi RX6 sounds like a good fit for your needs. You will need a lot of stuff for any single turbo, and I suggest a PowerFC, 1300 cc/min secondary injectors, and an upgraded fuel pump for your goals. It sounds like you have an M2 intercooler, and that is what I am running (a Medium) with a 10" PermaCool high performance electric fan (from Jegs.com).

I ran my RX6 for a week or two without a BOV and it just doesn't seem like a good idea. It is hard on the turbo and hard on the pipes and connections, too. I guess it doesn't need it or it would come with one, but I still feel better having a BOV. I got a very nice Tial BOV for $250 from Extreme Motorsports (guess the URL) and had it fitted and welded to one of my IC pipes for a little under $100. Others that got positive reviews included Blitz, HKS SS, Greddy type-R (? I think), and even the better TurboXS one. The Tial looked like it was top-quality, it came in red anodized (and other colors), and I found a good price so I got it.

You'll also need some kind of boost controller. I ordered an AVC-R from Titan Motorsports for $399 shipped (see their Group Buys section). The GReddy Profec B seems like a good choice for a little less money, too. Unfortunately, the PowerFC boost control kit does not seem to be available anymore. I was getting some ignition breakup before I had it tuned, so I got an HKS TwinPower from RXecret.com for $450 (also has good prices on injectors), but I am not sure if an ignition amp is really necessary or not. My ignition problems were from an overly rich mixture.

You will want to run more boost as soon as you get the turbo installed. 13 psi on my RX6 seems easier on the engine than 11 psi on the stock turbos did for some reason. I suggest you run 13-15 psi on the street and 15-17 on the track. I just made 367 RWHP on my RX6 at 13 psi. I meant to test at 15 psi (shooting for 400 RWHP), but I didn't get the AVC-R installed in time. I plan to run 15 psi for everything, maybe up it a bit at the drag strip (if I ever go) or lower it if I have engine temp problems when road racing.

And finally, you should get it all tuned somewhere. I think tuning is frequently overlooked, and it is often the best bang for your buck in terms of HP, not to mention reliability. I had my car tuned at XS Engineering and couldn't be happier with their work on it.

-Max

Hmmm..rxecret website doesn't exist is there a differnet url?

the mitsu 25G or the Apexi RX-6 are both good choices you cant go wrong with either one... i say go with the RX-6

oops, it is rxecret7.com -- the Rotary Xecret 7 site.

-Max

thanks!

I know single turbo FD's are more simplistic but the question here is does anyone drive their single turbo FD a lot? How long do the motors generally last? I'd rather stay twin turbo if i can make my motor last longer. will someone who knows a lot about tuning and cars give me some advice???

IMHO I do not think that single or twin turbos make a big difference in the longevity of a motor but rather how hard you push the motor is the issue. A single turbo generally has an easier time making the same HP as the twins do. Thus the TURBO is under less strain. The motor will see the same load factor at a given HP. A single has a much higher potential to make big horsepower (much higher than the twin set-up) and there lies the extra stress on the motor.