Hikaru

Hi guys, I'm new to the forum as well as an FD owner.

I had some questions that I mostly just need confirmation on, I read several posts after searching, hopefully some people can give me some feedback.

I have a '93 with '99 spec twins, stock intake, rb exhaust (looks like just the back portion), and a DP . the mid pipe looks to be stock since it has shielding around it.. I am also running the stock ECU as far as I know.

I want to put on a Blitz Nurspec R catback on the car since I've liked that exhaust on my WRX. The Nurspec R should be a 2 piece exhaust. From what I read it is reccomended that with my current mods that I should only put the rear section on to replace the RB dualtip I currently have.

Second I want to get the Blitz sus power intakes (twin intake) from what I've read these may cause boost spike.

I was thinking to install a Boost gauge first to see where I am at with what I currently have. I've read something about 10-8-10 being optimal, I have to check on what that means.

I also plan on installing the Blitz SBC iD to set the max boost at 10psi, i've read that this isn't fool proof though and that boost spikes can still occur.

It seems that most people don't run an open exhaust because it is too problematic? Or perhaps because it involves many parts to work correctly..

Please include any feedback about what I plan on doing to this car. I would like to hear it and learn, thanks
-Hikaru

seanbrowning

A lot of people do run a full exhaust, you just have to be sure to protect yourself from boost creeping/spiking by modding in the correct order. Do a search for mod order or something along those lines, it may even be in a sticky. It covers what order you'll want to mod to avoid spiking/creep.

RaPtOr-T

Well the turbos are powered by exhaust, so when you open up the exhuast your allowing alot more flow through, which means more flow through the turbos. Without proper mods this creates more flow than your stock wastegate can handle, wastegate is what vents excess exhaust from entering the turbos. As far as I know if you just port that wastegate you will be fine....Im not sure but upgraded ECU is probably important. But to be honest I just typed up this reponse to ask if you wanted to sell those RB duals

DaleClark

iTrader: (55)

First off, time to do some reading. You're really close to being on the danger zone with your current mods. Don't put ANYTHING on until you get a boost gauge and make sure your turbo system is working right.

That said, one big note on the exhaust. Racing Beat has always had 2-piece exhausts - makes shipping cheaper. Stock, the cat-back is one piece. So, if you get a different exhaust that happens to be 2-piece (many are not) there's no guarantee it would bolt to the Racing Beat pipe. In other words, consider the 2-piece Racing Beat exhaust as one piece - you aren't gonna swap components out with another exhaust.

The Blitz Nurspec is CRAZY loud on the FD. Won't be too bad with the stock main cat, but it has a reputation for being harsh and loud. If you like the canister style, look into the HKS Hiper - very well made, great fit, and very reasonably priced.

I'd seriously start looking into a computer before you go too much further. PowerFC's are very reasonably priced now, and will give you a lot of safe headroom for your mods, as well as the tuneability to run damn near anything you want on the car.

Dale

rynberg

Yet another thread with seriously questionable responses. What's up guys?

He's got a DP and a CB. He wants to swap out CBs and add an intake and you guys are telling him he's in the danger zone? BS!

Hikaru:

If you want another exhaust, go ahead and install the cat-back you want to (the whole thing, LOL). This will not effect the stock main cat. Install the intake and boost controller. The boost controller will control the boost to 10 psi with no spiking when setup properly (that's its function!). This setup is 100% safe to run on the stock engine computer.

renkenkyo

iTrader: (6)

From what I've read, the "danger zone" seems to be: intake, downpipe, midpipe, cat-back. At that point you're in danger of leaning out, leading to knock then detonation. This is deadly to a rotary engine as it can destroy the seals causing engine faliure and probably other bad things. To prevent this, more fuel needs to be added, by either going with a piggy back system or a fuel management system. Not sure if this is right or not. There's plenty of information in the FAQ and in various posts. I think if you have the main cat and something to prevent boost creep you'll be fine. Just my two cents, the more experienced guys like rynberg know alot more.

Good luck,
Josh

seanbrowning

Yah, I agree, although when I first read it I was thinking he was talking about putting a midpipe on, which would then put him into the dangerzone.