Dyno'ed the car for a second time since stock, this time with the addition of the plenum spacer.
Result: 167.3 rwkW
Specs: 2006 350Z | 221kW VQ35DE | K&N Panel Filter | Motordyne Intake Plenum Spacer
For comparison, here are the stock graphs. There was only a slight gain in power from 5000RPM to redline. Torque was improved throughout the whole rev range.
31st August 2008
Installed a Motordyne 5/16" plenum spacer. This is meant to allow more air into the engine, especially the front two cylinders which are normally starved of air due to the angled design of the factory plenum. Mid range to top end response should be improved. First impressions are that there is no real discernable difference in how the car pulls. I'll be happy if the dyno and acceleration results prove the claims correct.
13th September 2008
Bypassed the throttle body coolant by rerouting it through a metal L piece pipe. Thanks for getting it for me Silas.
