What else should I do before chipping my car?

[70Sixter]

Check out Jake Raby. Or LN Engineering.

http://www.flat6innovations.com/

No affiliation with either.

Personally I'd upgrade my IMS first.

[violametallic-S-]

Ive looked into the Raby rebuild options. Way too expensive. Rather sell my Box S, save the 15-20gs for the rebuild and buy a 02 911 turbo thats on ebay right now for 35US, very tempting...

[70Sixter]

[QUOTE=violametallic-S-]Ive looked into the Raby rebuild options. Way too expensive. /QUOTE]
The IMS upgrade is < $1000 USD. Not for performance, but longevity.

On the other hand the Turbo engine is a stronger engine to begin with.

The Turbo, GT2, and GT3 engines are not based on the M96/97, but the old split crankcase GT1 block. They share nothing in common.

996 Turbo's are probably the deal of the century currently.

[Cartel]

As Kirk mentioned a UDP would be worth your while. As soon as I finish out my clutch/lwfw work I will be trying IPD's Plenum couped with an enlarged throttle body via RSS. Other than that you are not left with very much more to cover other than camshafts, but at the price point and labor it really is a bit much and not worth it (so I think).

[Flavor 987S]

Before chipping your car, you should learn how to drive it!

Don't take this the wrong way. This is true for most of us, myself included. The car is much-much more capable than you are as a driver. So, invest some money and learn to become a better driver.

Then if you require more performance, do some upgrades to the car, or invest in a higher performance Boxster or Porsche.

And, most of these "performance upgrades" are questionable at best. You might gain a few HP here & there, but at what cost in terms of value ($$), reliability, low end torque, mid range power curve....etc.