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CNC Machining

We have the software and machines to manufacture almost anything that can be drawn in the form of a solid model.  Shown in the pictures is a front upright for a nissan skyline race car, this item was made in left and right hand totally from a solid works type 3d model in high tensile aluminium.

Solid modelling is extremely useful in manufacturing specialised items and more so with assemblies for prototype or one off projects.  Our range of flywheels can be made from solid models if specific shapes or MOI (moment of inertia) values are required for race engines.

Rotary Parts

Perhaps our most popular items are our kits and upgrades for the Mazda rotary engine.  Rotary enthusiasts have always dreamed of adding "extra" rotors to their engines, this has always been out of reach untill the arrival of the 20b engine from mazda, now discontinued, the Le mans quad engines have always been very exclusive and unobtainable for the general public. 

We have developed a kit using mostly standard 13b type parts that opens the door to multi rotor engines. The heart of the kits is surprisingly not the actual crankshaft but a modification that involves fitting a front stationary gear into a normal Mazda side housing. This allows almost any number of "extra" rotors to transmit their drive to the crankshaft. 

The crankshaft is of course the other part of the kit and is manufactured in three and four rotor variants, up to six rotors can be built in this way. These engines are the same in capacity as the genuine Mazda engines but, due to the thinner side housing that is used, are shorter and lighter. Another variation is the inclusion of an extra centre bearing on the three rotor engine and is also available on special order for the quad engine, this means that both sides of ALL the rotors have bearing support to reduce crank flex, these special cranks are also lighter than their normal versions.

The kits can also be supplied with longer dowel and either 10mm or 12mm through bolt sets. Sump plates, exhaust and inlet manifolds can aslo be supplied on request. We also manufacture 13b and 12a crankshafts that are a direct swap for the standard items, special heavy duty versions are available from high grades of steel and others that are thicker than standard and require the centre housing bore to be opened up by 3mm to fit the thicker crank, corner radius's are also increased to 7mm (from the std 5mm).  These two rotor cranks can be made with the extra centre bearing. These cranks are particularly suited to perpheral port engines with their high rpm characteristics and the associated flexing of the standard shaft.

4Rotor Centre Bearing Crank Assy

4Rotor Centre Bearing Crank Assy

6Rotor Crankshaft Assy

6Rotor Crankshaft Assy

4Rotor Crankshaft Assy

4Rotor Crankshaft Assy

20B Crankshaft

20B Crankshaft

13b Centre Bearing Crankshaft

13b Centre Bearing Crankshaft

13B Replica Shaft

13B Replica Shaft

3Rotor , 12a Based Shaft

3Rotor , 12a Based Shaft

5Rotor Shaft

5Rotor Shaft

20b Billet Weight Set

20b Billet Weight Set

20b Billet Mid Gear

20b Billet Mid Gear

Billet Gear for Ally Housings

Billet Gear for Ally Housings

Flywheels

The most cost effective performance upgrade for a car is a lightened flywheel.  Standard items are always quite heavy to smooth out standing starts and general driving , this is not ideal in the performance world.  Removing rotating mass is the oldest trick in the book in performance tuning.  Lightened flywheels make your car engine accelerate quicker, less power is used to change the speed of the flywheel and more goes to the back wheels.  We make a large range of steel flywheels for almost all vehicles and clutch types.  Worth noting is that drag cars actually require a HEAVIER flywheel than standard, weights up to 25lb are common in top cars along with a slipper type clutch. 

1UZ Flywheel

1UZ Flywheel

Drive Line Parts

Almost all OEM gearboxes suffer the same problems when being used in race cars, be they circuit or drag or just fast street cars. The problem is the ratios are suited to the normal road application, ie first gear is way too low, and in the rally application, fifth gear is way too high. We can fix this by custom manufacturing a set of ratios that suit YOUR vehicle.  We factor in, tyre size, diff ratio, engine RPM characteristics and your application. So in a rally car this would mean a much higher first gear, approx. 75km/h, and generally a much lower fifth gear. Most rally cars are geared for a maximum of 200km/h.

In a circuit car, the same rules apply for first gear, but fifth is often only lowered a small amount . All the other gears are made to provide ever decreasing gaps as set by first and fifth ratio's. We can also make almost any ratio that the customer requests.

Front wheel drive type gearboxes and their 4WD variants can also have custom diff ratio's made.

We can also manufacture special gearsets to suit certain applications, these include removing synchro units and replacing with "crash" type engagement, this is essential for high revving engines as synchro systems will "baulk" over 7500 rpm preventing shifting from occurring unless excessive force is used. This can cause selector fork failure.  Also made are take apart type layshafts that allow easy changing of ratio's to fine tune the car or setup for certain tracks.  Longer input shafts can allow optimum placement of the gearbox to keep the gear lever in the best place for cars with seats that are further back or for weight balance.

We manufacture adapter plates to let you fit engine/gearbox combinations from different vehicles or models, these can either be sandwich plates between the gearbox and bell-housing or plates between the engine and gearbox. Often a special flywheel is needed for these mixed units. 

Nissan Drive Flange

Nissan Drive Flange

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