Project NSX: Part 3 – Building a Race Proven C32 Engine


FX Motorsports development heavily modifies the oil pan by adding wings to increase the capacity and installing the 
STMPO baffle to prevent the oil from sloshing away from the pickup under cornering G loads, which is a big problem for NSXs in long duration right hand corners.

With new valve guides and a little cleanup work done by Portflow Design, the head is nearly stock.  The stock C32 head flows well and it’s not really cost effective to extensively port it for a street turbo motor.  Surprisingly FXMD’s record-breaking race motor uses a similar level of head preparation.

The cylinder heads are amazingly stock.  The C32 has excellent flowing heads from the factory and the mods are mostly done to allow for some high rpm anti float headspace.
A 1mm larger diameter Supertech intake valve is used as well as a 1mm larger inconel exhaust valve to handle the heat from the combustion.  To reduce weight and improve high RPM performance, titanium retainers were used as well as Supertech valve springs. The engine uses the stock VTEC camshafts which actually work pretty well with a turbocharger.

As you can see, most of the modifications that FX Motorsports Development has developed for the turbo C32 are ones that are done to fortify the engine for boost pressure and for long term durability and reliability.  Most of the power increases come from the turbo system.  Stay tuned, in future installments of Project NSX, we will look into the turbo system, suspension and brakes.

Sources:

FX Motorsports Development

WPC Treatment

Portflow Design

CP Pistons

Crower

Darton Sleeves

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