Dinan Throttle Body, Euro-HFM, Schrick Intake Manifold & Dinan Stage 5 Software

Yep, power corrupts. My next mod was the entire Dinan Stage 5 setup. The Dinan Stage 5 engine consists of the cold air intake, an oversized airflow meter (HFM) from the European M3 (3.5" instead of 3"), a bored-out throttle body (66.5mm vs 64.5mm), a Schrick intake manifold and software designed to bring the whole package together. To help with cost, I purchased the HFM from ECIS who has a much better price. The Schrick was ported and polished by hand (instead of eXtrude Honed) because the manifold is made of aluminum and is very rough inside the runners and plenum in comparison to the stock thermoplastic manifold that is smooth. The Schrick is also powdercoated to appear stock.

I didn't test of each of the Stage 5 components, I installed them all at once, so I can't comment on the effectiveness of a single piece. As it stands the car needs a bit more tuning. There is a slight, but noticeable drop in torque, but the high RPM operation of the engine is improved. Overall, I don't think it was worth the cost in that the hp improvement doesn't necessarily offset the torque loss. I would recommend to people that they save the $$$ for a supercharger.

The following links present dyno data: Dyno Graph and Dyno Details For Dinan Stage 5 Engine... still tuning.

Stage 5 Engine

Stock vs. Schrick.  Notice the Runners and Plenum Are Larger. Notice The Runner Inlets Are Larger On The Schrick

US vs. Euro-HFM (Euro-HFM 1/2" Larger) US vs. Euro-HFM (Euro-HFM 1/2" Larger)

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