Thats the thing. I haven't heard an exhaust that I thought sounded better than the Nur Spec-R. But to eliminate any questions about back pressure, I want to go with a full 3 inch unresonated setup. This is probably the closest to a straight pipe I could get.
I have the Invidia V1 DP and Catback from Weapon WRX's wagon, souinds good and not too loud. The N1 is slightly louder IIRC.
New exhaust installed today. I really like the look of the angled tip. It seems quieter than the blitz at idle, but louder when I am on it. Definitely raspier. Haven't put it on the dyno yet so I can't say how much, if any, I have gained in power with the swap. Butt dyno says it spools a little quicker too. But my butt dyno lies to me sometimes, so I'm going to wait till I can throw it on a real dyno before making any conclusive statements. On my AVC-R, I had to turn the wastegate duty cycle down by 4% throughout the band to hit the same boost. IIRC, 4% change gave me about 3-4psi. I think that's a good indicator of how much back pressure I have freed up
Sweet 4% data change is pretty darn good. That number may seem small but that means nothing in the exhaust post turbo is holding you back now! 500hp hopefully is right around the corner. Are you gonna see if a retune helps or just gonna throw it on the dyno?
I'll decide after I throw it on the dyno. If the gains are small, then I doubt there is much to gain with the tune. If the gains are big enough, then I might get it tuned. I'm not chasing after a number. I'll be happy with whatever I make with safe AFRs. On the street in 4th gear, the car usually spikes about 27.5 psi, holds about 27 psi and tapers off to 25.5 psi. I don't think I want to run any more boost than that.
Not a problem I will be selling the cat back section (Blitz Nur Spec-R) in a week or two. I want to make sure that there are no problems with the new setup before I get rid of the old stuff that worked. When I decide to sell it, I'll PM you before I post up a thread. I am not sure if I intend to sell the downpipe. I need to look up emission laws in TX. I might need to swap downpipes for the yearly inspections
Congrats Milo. I bet that you will really enjoy it. I am thinking seriously about the Invidia for my FXT also. I heard that they do well with Forester's. The STi looks BA as usual!!. Mark
Milo thanks again for the ride in that beast your car is SICK! Danielle was talking about you car all the way home and shes actually down with me getting more powa Thanks :rofl: !!!!!
Looks awesome man! Invidia has some of the best quality parts I have ever seen. From the pics it looks like you tapped another bung for the downpipe. Did you?
Scary update hnoes: Noticed that the car was running lean at WOT. How lean you ask? 14+ AFR in 4th before I lifted hnoes: This obviously scared the shit out of me. I called Scott and turns out that I blew off the vacuum line from the intake manifold to the fuel pressure regulator. What a shitty design. There was no nipple to hold the vacuum line on. I know I am running a lot more boost than stock, but I could slide the line on and off, no problem. I need to zip tie the shit out of them. The car seems to be running fine. Pulled hard. No oil in the catch can. No CEL. I'll be very lucky if I didn't break something. Compression and leak down tests coming up in the near future hnoes:. Anyone else running high boost experience the same problem? I would recommend everyone secure that line well.
Yeah, I noticed that on my car when I did my upgrade. I didn't have it blow off on me, but I did exactly what Will said and haven't had a problem since. Hopefully you caught it fast enough that it didn't do any damage.
Well, my first thought was that maybe the wideband was going bad. But then the stock O2 sensor also started reading high. The messed up thing is that it still pulled real hard and smooth. I had no reason to believe that something was wrong.
Pulling hard and smooth means it didn't pull timing from knock which is what usually does the pistons in. You were running super high egt's but only for a very brief time. I really think you'll be ok.
If you were running leaner it's gonna pull harder until the ECU says woah and yanks the timing....that's the scary thing.
Been a while since I posted an update The vacuum line issue never repeated itself. The car has been running great since then. I had some issues during the Dallas summer. After driving around during hot afternoons, the car would drop the advance multiplier. Scott immediately sent me new maps with greater compensation and the problem seems to be gone. Thanks again Scott :bigthumb:
Summers are always hot in Dallas but I don't remember it being this humid the last 2 years. In fact the AC in my apartment can barely maintain 75 degrees during the day.
you need one of those AC units they had in the hotel in Alabama! You could raise a family of penguins in that room...
hahaa... I kept thinking I was the only one that was cold so I didn't want to say anything! My sleeping bag is rated at 40 and I was shivering!
I am officially out of the Subaru owner's community. I sold the STi 2 days ago, and got into something that is as much, if not more fun I'll post some pics this weekend. Some of you already know what it is, so don't spoil the fun
hmmm what could be as much or more fun than an AWD 400hp suby. Skyline is all that comes to mind. I can't wait to find out.