PHOTOS

The Nissan SR20 DET variable camshaft block under going the conversion to the DARTON sleeve product.

SR 20 DET block with the DARTON Sleeves installed and the deck machined

Sleeves shown with the block as various shots

A Honda B18C block being prepared for the DARTON sleeve product using conventional machine shop vertical boring equipment.

This photo shows the torque plate tensioned onto the Honda block to pre-stress and secure the DARTON sleeves for machining the bores.

The end result in selecting the DARTON sleeve for our purpose: very high compression, successfully built and tuned to 130kw at the wheels.

(With reliability; thanks to working with owners and skilled dyno technicians who know what they want and understand how to get there.}

This job led us to buy our new state-of-the-art CNC equipment. Very difficult work using conventional equipment. Those days are gone 

This naturally aspirated B18C Honda block went on to develop excellent and reliable street performance, at considerable compression, running on pump fuel.

The DARTON sleeve for this Honda interlocks the walls of the block and has direct contact with the block's coolant; an excellent product for the top end of engine development.

The demanding machining specifications were achieved without the CNC mill and tooling that we have since installed into our business.

Part of our range of engine block torque plates that we offer with performance engine machining. The method involves pre-stressing the block by assembling this "artificial" head to hold the block in it's assembled state whilst we finish off the honing of the bores.

The procedure greatly enhances the perfomance of piston rings and represents great value in obtaining cheap horsepower. It achieves this by reducing imperfections caused by head bolt and engine block design problems that distort the machined bores during engine assembly.

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