ecm1389 Posted October 30, 2013 Share Posted October 30, 2013 I have a 100% stock 2006 spec B. id like to purchase a cobb Access port. id rather spend the extra 100 dollars for the v3. I have read that a full turbo back exhaust is recommended for stage 2..is it a must and should I just go for stage 1. sorry but bear with me I am new to this thanks Link to comment Share on other sites More sharing options...
PtPixel Posted October 30, 2013 Share Posted October 30, 2013 Welcome! Introduce yourself over at the introductions page. Also in that forum is a great sticky which is a good read if you're new to the forum, tells you just about everything you need to know. Full turbo back isn't necessary, what is required is an aftermarket down pipe, either catless or with a high flow cat. A new DP will decrease back pressure on the turbo (letting you safely hit higher boost targets) and increase turbo spool time. I'd say get the AP, which means you can go straight to stage 1, then in your own time get a DP and then flash to stage 2. Since you're a prefacelift model LGT then you should definitely look at getting a catless up pipe. If your stock catted one fails then it'll send shrapnel through your turbo. There are some aftermarket ones available or you can get a used 08+ WRX or 07-09 LGT UP. Link to comment Share on other sites More sharing options...
ecm1389 Posted October 30, 2013 Author Share Posted October 30, 2013 thanks for the help..I am in a state were emissions are a must so I would have to keep my cat correct? and I wasn't sure if the stage 2 access port would be able to flash stage 1...im really just looking for a bit more performance out of my Subaru not to much since it is a daily driver. iv been reading alot on here that other upgrades are pretty useless with out a tune Link to comment Share on other sites More sharing options...
PtPixel Posted October 30, 2013 Share Posted October 30, 2013 Yup you'll need to get an aftermarket DP with a cat then. The only different types of accessport you can buy are versions - older to newer. Don't know much about V1 but V2 and V3 are very similar, different interfaces/button design but the computer itself is the same. They'll all flash stage 1/2/other "off the shelf" tunes or do opensource tunes (tunes from a protuner that are flashed to the ECU using the accessport). Yeah just about anything you change to the way the engine works should result in a tune - intake, turbo, fuelling, boost control etc. Otherwise you risk running the engine in conditions it is not tuned for/able to handle - can be very unhealthy. Link to comment Share on other sites More sharing options...
ecm1389 Posted October 30, 2013 Author Share Posted October 30, 2013 thanks man very helpful. so do you think that the AP should be my first purchase? Link to comment Share on other sites More sharing options...
PtPixel Posted October 30, 2013 Share Posted October 30, 2013 Yeah don't see why not. As soon as you have it you can flash to stage 1. If you're looking for more power then an accessport or tactrix (only for opensource tuning) should be one of the first steps. If you're looking for anything beyond stage 2 then I'd suggest brake and suspension upgrades, not much use having all that power without being able to stop or handle it. Link to comment Share on other sites More sharing options...
SATSFYD Posted October 30, 2013 Share Posted October 30, 2013 To met emissions you do NOT need the cat in the UPPIPE. (Uppipe is the pipe feeding into the turbo.) Emissions requires you to have a cat in the DOWNPIPE... (The downpipe is the pipe being feed by the turbo.) a Downpipe with a high flow cat will met the need/requirement for the 49 state emissions law... in CAL it is unknow to me. **There are two types of people in the world, those who build horsepower and those who buy it. Which one are you? Link to comment Share on other sites More sharing options...
ecm1389 Posted October 31, 2013 Author Share Posted October 31, 2013 Would there be advantageous for me to get a cat less uppie?..besides the fact my stock catted could always fail Link to comment Share on other sites More sharing options...
PtPixel Posted October 31, 2013 Share Posted October 31, 2013 Apart from it being a very good idea, a cat in the up will restrict air flow into the turbo slightly - without one you will get better spool response. Catalytic converters often fail, so more a matter of when, not if. They can also clog up, restricting flow further. Link to comment Share on other sites More sharing options...
ecm1389 Posted November 1, 2013 Author Share Posted November 1, 2013 Say id rather not take the chance with a cat less uppie. And have it fail inspection. Should I still look into a high flow cat for the up pipe? Link to comment Share on other sites More sharing options...
PtPixel Posted November 1, 2013 Share Posted November 1, 2013 It wont fail the inspection, all facelift legacy GTs (07+) have a catless up pipe. This was done because of the potential to destroy the turbo and in turn destroy the engine. A high flow cat in your down pipe is what you will want to pass emissions, yes. Link to comment Share on other sites More sharing options...
SATSFYD Posted November 1, 2013 Share Posted November 1, 2013 You could always gut the uppipe cat... that's what I did. Turbo spools about 450 rpm faster. **There are two types of people in the world, those who build horsepower and those who buy it. Which one are you? Link to comment Share on other sites More sharing options...
ecm1389 Posted November 1, 2013 Author Share Posted November 1, 2013 What would involve.in gutting the up pipe? Link to comment Share on other sites More sharing options...
ecm1389 Posted November 1, 2013 Author Share Posted November 1, 2013 Never mind. I actually just read how to gut the stock uppie..not real sure if that's for me Link to comment Share on other sites More sharing options...
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