All Things Mk5 > Performance Modifications
Intake waste of money?
AJP:
--- Quote from: Pudding on September 23, 2016, 03:04:14 pm ---Good info about the Ed30 vs GTI OEM paper filter. I didn't know that! So it has the same amount of pleats, just not as thick?
330-350hp seems a reasonable restriction limit for the factory airbox. If it were THAT restrictive, paper filters would buckle and distort and the intake tube / airbox would collapse under max boost / rpm, like humans inhaling on a crisp packet.
--- Quote from: AJP on September 23, 2016, 12:09:49 pm ---Here's a curveball then... Niki told me that the drop off in power at the top of my rev range was because of my standard airbox (Stage 2 k03).
Interesting claims with VWR. I've heard that Niki likes the Revo intake. To be honest I don't think an intake alone is going to make a huge difference to the top end of a k03 car. I'll get a better turbo for that, and probably stick an intake on to help it flow a little more while I'm at it.
--- End quote ---
That looks like a normal K03 curve to me. It does start to run out of puff past 5500 like that anyway and the two lines neatly converge at 6000, where it has little more to give. I can't see an intake making a huge difference, although replacing the standard thing with a big pipe is always going to improve flow into the turbo a bit, well, into the MAF housing at least. You might find perhaps, a realistic 10hp up there with a decent intake on the K03?
Turbo engines are fighting two pressure differentials. The exhaust gases leaving the cylinder, and the boost pressure entering it. The turbo struggling to draw enough air in ranks quite far behind those two challenges and only becomes a factor when they've both been freed off as much as possible. Any power you do find from an intake is always right at the top end, where not that many of us drive at for very long! I can't remember the last time I exceeded 7000rpm!
--- End quote ---
I'm with you on that mate. Well put.
Like I said, I'm prioritising a turbo upgrade over an intake. Just seems futile expecting big things from an intake unless you're at the very least on a 2+ k04. I'd imagine with a k03 hybrid and associated 2+ mods a decent intake could be a nice thing to have, but still not exactly essential.
pudding:
I was also thinking if the same airbox on the Edition can support 300+hp, your curve is definitely the turbo running out of puff :smiley:
Yeah a bigger turbo is the way forward. I just wish the TTE turbos weren't 2 grand!
AJP:
--- Quote from: Pudding on September 26, 2016, 11:25:11 am ---I was also thinking if the same airbox on the Edition can support 300+hp, your curve is definitely the turbo running out of puff :smiley:
Yeah a bigger turbo is the way forward. I just wish the TTE turbos weren't 2 grand!
--- End quote ---
I don't have the luxury of strong internals so I'm conveniently (in a financial sense) capped to ~350bhp!
I'm sure I'd have priced up one of TTE's offerings if I was in a k04 car though
Dan_FR:
--- Quote from: Pudding on September 26, 2016, 11:25:11 am ---I was also thinking if the same airbox on the Edition can support 300+hp, your curve is definitely the turbo running out of puff :smiley:
Yeah a bigger turbo is the way forward. I just wish the TTE turbos weren't 2 grand!
--- End quote ---
It doesn't work like that. A big turbo could pull 500hp from the factory airbox, but it doesn't mean it's "good" for that hp on any turbo setup.
Same as a cat or decat. Just because a stage 1/1+ K04 can make 340hp with the standard cat in place, doesn't mean it's "good" for that level of hp and won't become a restriction at a much lower level of power on a smaller turbo
spwd:
Just read this thread and will be picking up my 06 dsg gti this week and usually I guess an intake is the first thing done on many cars but you guys are saying they're not worth the expense and I'd be better off buying a panel filter like the one @Ollieeee is selling?
When I had my MR2 Turbo a few years back the intake and intercooler made a massive difference so what's the difference?
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