APR Stage 1 on the GTI was revealed.

"BugEyedBimmer - back in the Saddle Dakota Leather" (bugeyedacura) 07/17/2014 at 23:56 • Filed to: None

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Its over 300hp and even more torque. And all I can think about is "how do I get that engine in a Beetle with 4mo?"

twinturbobmw > BugEyedBimmer - back in the Saddle Dakota Leather 07/18/2014 at 00:04

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I don't care how much power my Beetle has, if it has an orange GT3 stripe I'm down.

GhostZ > BugEyedBimmer - back in the Saddle Dakota Leather 07/18/2014 at 01:01

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You get it into a beetle with 4motion by buying a Golf R.

GhostZ > BugEyedBimmer - back in the Saddle Dakota Leather 07/18/2014 at 01:06

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Also, on another thread about this very same topic started by someone earlier in the day, I can totally see why these engines produce so much power. They have massively long strokes for 4 cylinders, approaching big-block V8 stroke lengths. Combine that with probably thick cylinder walls (from a narrow bore), low pistons speeds, and fancy fuel injection, and they would take to boost like nothing else. It's the complete opposite approach of an engine like the SR20DET, which produced similar numbers, but by reaching 8000+rpm on medium boost.

However, I would like to see if anyone can manage to bring the 2.0 up in RPM to, say, 7000. There could be huge horsepower gains (~450 vs 300) if you can manage to keep that massive stroke spinning at higher RPMs.

samssun > GhostZ 07/18/2014 at 03:20

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Longer stroke means higher piston speed per rpm. Race engines tend to be oversquare (high bore:stroke ratio) to allow them to rev higher while keeping piston speed reasonable. High power isn't because of the long stroke, but despite it.

In a small displacement turbo engine, the turbo size is limited by its ability to spool, which in turn means it's a restriction up high. If you're not trying to rev to the sky, you can get away with longer stroke, but if you want to send this thing to 7k+ effectively, you really want a higher bore:stroke ratio, and a turbo that can keep flowing that high (and on an engine that small, you'll suffer lag since it doesn't flow enough at 2000 rpm to spool a big turbo).

BugEyedBimmer - back in the Saddle Dakota Leather > twinturbobmw 07/18/2014 at 10:44

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Same here lol

BugEyedBimmer - back in the Saddle Dakota Leather > GhostZ 07/18/2014 at 10:45

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I prefer the look of the Beetle.

BugEyedBimmer - back in the Saddle Dakota Leather > GhostZ 07/18/2014 at 10:47

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You're never going to get anything revving that high on the stock bore/stroke because its too under square. However, 7-7500 isn't at all unrealistic. APR just released upgraded Valve Springs too for just these types of applications.

GhostZ > BugEyedBimmer - back in the Saddle Dakota Leather 07/18/2014 at 10:52

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I imagine that north of 7k you're looking at race-only application and extreme examples.

It's just so weird for me to see a motor that can be easily modified like that, but revs like a truck. Even old big block V8s (Caddy 500, Ford FE, GM Big Block, Dodge RB) will hit 8000rpm if you're looking to make serious power out of them.

uofime > samssun 07/18/2014 at 11:25

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what VW has made is a tractor engine haha

GhostZ > BugEyedBimmer - back in the Saddle Dakota Leather 07/18/2014 at 11:34

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WELL VAG DOES NOT, APPARENTLY!

GhostZ > uofime 07/18/2014 at 11:35

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Hook two of them side by side and you would have basically one of those massive turbo tractor pull engines that make twice the torque as they do horsepower.

uofime > GhostZ 07/18/2014 at 11:47

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and that would be awesome!

BugEyedBimmer - back in the Saddle Dakota Leather > GhostZ 07/18/2014 at 18:34

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My car redlines at 8k...

BugEyedBimmer - back in the Saddle Dakota Leather > GhostZ 07/18/2014 at 18:36

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They're afraid of what it represents...