Tuning K-series 1.4, 1.6 & 1.8 (non VVC)
For any serious power gains the cylinder head has to be reworked to optimise volumetric efficiency i.e.-efficient airflow management through the head. All heads can be supplied with cams of choice, heads are designed for road use and will produce a smooth turbine like power increase without flat spots or lumpiness often associated with 'tuned' engines. All heads are fitted with new stem seals, pressure tested and refaced. Valves are precision cut and set at the correct height to give optimum performance. Competition valve springs are fitted at extra costs, when high lift cams are specified. On assembly we use new cam seals and oil soluble cam carrier sealant, this prevents oil-ways from becoming blocked and bearing surfaces damaged with hardened sealer. All replacement valves used are made from stainless steel one piece forging of superior design. All porting and gas flowing are carried out in house to exacting standards. All heads can be fitted with solid lifters if required at extra costs.
Stage 1 - similar BHP to the VVC, more bottom end gain rather than top end gain.
This involves gas flowing and porting with some work to the inlet valve profiles. The standard valves and springs, (27.5mm inlet, 24mm exhaust) are retained. This is a good mod for road use and frees the breathing up considerably. With a suitable filter system BHP goes up to around 126 at the wheels standard is about 105BHP. Similar gains in the torque are also achieved, altogether a good budget option.
Supply only £450.00
Fitted with new gaskets oil etc. £850.00
Stage 1 plus - increased BHP throughout the power band and with top end gains In addition to the above we can fit a high lift inlet cam (10.87mm compared to the std. 8.8mm) with an adjustable cam gear, this allows the timing to be set accurately, The high lift cam will give additional top end power and torque new valve springs are fitted to prevent coil binding.
Supply £310.00
Fitted to stage 1 head £310.00
Stage 2. - Additional gains in BHP through the whole power curve +25 BHP @6000rpm
In addition to gas flowing and porting this head involves fitting bigger valves, 29.5mm inlet and 26mm exhaust, into the original valve seats, again more power and torque due to increased airflow potential.
Supply only £750.00
Fitted £1150.00
To optimise power gains we recommend a higher lift inlet cam, adj. vernier and new valve springs £310 00
A high lift exhaust cam & vernier fitted with some gain in BHP, some lumpiness may occur £235.00
Stage 2 plus for those who love to "work" the engine this conversion gives optimum gains with new cams.
This involves fitting new valves and valve seats to the same size as the VVC (31.5mm inlet, 27.5mm exhaust) with reshaped ports and valve throats to give greater airflow = power and torque.
Supply £950.00
Fitted £1350.00
To optimise power gains we recommend a higher lift inlet cam, adjustable vernier and new valve spring £310.00
High lift exhaust cam & vernier recommended, some gain in BHP, some lumpiness may occur
£235.00
Stage 3 this modification this is for the serious enthusiast requiring that few extra BHP
Stage 2 plus the addition of bigger valves than the VVC (32.5mm inlet, 28.3mm exhaust) and produces more power due to the better design of the valves and greater airflow.
Supply £970.00
Fitted £1370.00
To optimise the power gains we recommend a higher lift inlet cam, adjustable vernier and new valve springs £310.00
A high lift exhaust cam and vernier is recommended with more gain in BHP, some lumpiness may occur £235.00
52mmdia alloy throttle body for improved airflow £112.00
So there you have all the options we think are suitable for road use with the occasional track day.
For optimum performance we recommend the Pipercross EVO filter assembly
Supply From £250.00
Fitted from £290.00
In addition to the above work we recommend the exhaust manifold is 'reworked'. This involves removing the internal restrictions at the head flange and re-welding on the outside of the manifold. Supplied £65.00
Fitted with any work above £75.00
This is either customers unit or a surcharge of £80.00 is applied until the old unit is returned.
