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Old 08-19-2010, 02:11 PM   #1
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Location: Seattle Area
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Quote:
Originally Posted by Kirk
I had an '02 WRX that I modded up to about 300 HP. That thing was fun to drift through corners when the turbo kicked it. I'm not sure how well this would work on the light RWD Boxster though. Isn't this the kind of behavior the original 911 Turbo had with the turbo boost coming on in a rush? That's why those things were widow makers and I suspect that's why Turbos are now AWD. A turbo Box with its mid-engine layout will be better than the old rear engine 911 Turbo, but you'd still run the potential for some extreme oversteer if the turbo hit hard while trying to power out of a corner.

I've been following this thread and personally I'd still opt for a 911 engine if my Boxster S engine failed. I can drop in a 3.4L 300 HP NA engine relatively easy. Compared to a stock STi engine you're pretty much even then. Sure you can mod the 2.5L WRX engine for more power, but you could also do a low pressure (6 psi) system on the 996 3.4L too. Dollar for dollar I think either route will get you about the same thing either stock or modified, but swapping in a Porsche 911 engine should be much more straight forward.

Kirk
I'd be really surprised if on a dollar for dollar basis you'd end up with an equivalent motor. I think the Subaru engines would be less expensive to purchase and keep up for an equivalent performance.
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Old 08-19-2010, 02:26 PM   #2
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Location: Gilbert, AZ
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The thing with lag is there are SOOO many different turbo options available that you can basically fine tune the characteristics for your exact application. Grant is right, if you think it's going to be like 930 lag, it won't be... I mean it can be if you want it to be, but it doesn't have to be.

This prototype car for example...

2.5 liter motor
Stock cams
Dual ball bearing Garrett GT30R turbo with twin scroll housing

Horrible lag... I think not.
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Old 08-19-2010, 02:32 PM   #3
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Join Date: Aug 2008
Location: California
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Quote:
Originally Posted by kcpaz
The thing with lag is there are SOOO many different turbo options available that you can basically fine tune the characteristics for your exact application. Grant is right, if you think it's going to be like 930 lag, it won't be... I mean it can be if you want it to be, but it doesn't have to be.

This prototype car for example...

2.5 liter motor
Stock cams
Dual ball bearing Garrett GT30R turbo with twin scroll housing

Horrible lag... I think not.
Here is a 2600 lb 2.5 liter STI tuned for AX. Let me know if you see any lag here.

http://www.youtube.com/watch?v=hCl92i0O2zc&feature=channel
http://www.youtube.com/watch?v=YmXBHSVzGDA&feature=channel
http://www.youtube.com/watch?v=o3zNHhnWzL0

Now imagine that same motor in this 2000 lb Boxster. Oh I mean 1900 lb Boxster


Last edited by grantsfo; 08-19-2010 at 02:38 PM.
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