Here is my A15 crank to be used with the Tomei head in a new A15 engine. The stock A15 crank above weighs 12.5 kg. My lightened crank comes in at 8.5 kg's.  

These cranks are available for $1500 with donor crank.

Nitriding was chosen as the heat treatment method, as this provides a thicker hardened skin giving a stiffer crank. Cost of the process and straightening is significant.

SPROCKET SHOWN SUITS Z18 TURBO AND L-SERIES 4 & 6's. This sprocket is fully adjustable over an 18 degree range to make dialing in after market cams easier than vernier sprockets  $220 inc GST

A12, A13, A14, A15                                                  L and Z series

 E13, E15ET, E16  ADJUSTABLE CAM DRIVE $180 inc GST (donor drive required)

Sprocket has 9 degrees adjustment either side of centre position.

ALWAYS Loctite screws after adjustment. 

CUSTOM SUPERCHARGER DRIVE PULLEYS

(MICRA step up pulley shown) $550

L13 L14 L16 L18 L20B 

Water pump is underdriven 0.87 with alternator overdriven 1.61 times crank speed.

The drive can have a second pulley added to suit dry sump pump if required.

L24 L26 L28 

Water pump is OVERDRIVEN 1.3 times crank speed and Alternator 2.41 times crank speed.

This is similar to the stock 240/260 Z ratio.

The drive can have a second pulley added to suit dry sump pump if required.

A SERIES HI ENERGY Electronic distributors. 

Modified for A series engines (with supplied donor bluebird electronic distributor and an A series distributor drive gear) 

These distributors are fully electronic and with the right high energy coil produce extremely hot plug voltages and current. Instant starts every time for your A series when tuned correctly.  A custom alloy clamp bracket shown on both dissy's

 $440 inc GST Note donor bluebird distributor required. Clamp is $66 inc GST 

Manufactured from ultra high tensile alloy these retainers are for engines using either 7 or 8 mm stem valves. Light retainers cuts down valve train inertia and reduces rocker loads allowing lighter spring pressures at higher RPM. Each retainer is 9.25 grams lighter than the stock retainer or about 40% of the mass of steel parts.

(Note spring ends must be smoothed before fitting)

SERIOUS ® Alloy retainers for L series valve springs 

This L16 race head is for an engine running 1600cc capacity class. Head has 44 inlets with 35 exhausts ( 214N stainless/Nitrided). Alloy spring retainers and composite alloy/steel lash pads are used with matched rate spring sets. Rocker arms have been extensively lightened also. Head will be sold as shown $2200 inc.

Caps are located by dowel pins and 9.5mm aircraft grade bolts used.

The head is designed for improved breathing for all 2 litre and above L series 4 cylinders. They can also be made for 2.8 litre and above L6 engines . The L4 heads heads have 47mm inlet valves and 38mm exhausts. The head requires an 88mm plus bore.

Each head is crack/pressure tested then ported and flow bench checked to ensure even port flow.

New seats and K-line valve guide inserts are fitted. Chamber volumes are matched to 0.1 cc and chambers blended into seats.  All head surfaces are machined.

The valve springs used are capable of being used with cams up to 0.560" lift. The spring retainers have high sides for thicker lash pad retention. 

CLICK PICS TO ENLARGE

These 4 cylinder head inlets flow approximately  230 hp on a  current model Superflow bench at 25" water test pressure.