ducati race Engine cylinder head & dyno tuning specialist bristol england

 

DUCATI CYLINDER HEAD PREPARATION

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THE FLOW BENCH & WHY WE USE IT

The flow bench is for testing and optimising cylinder heads. It measures airflow through the ports and is capable of pulling very high pressures via its powerful motors installed inside the bench.  The pressure drop is measured by the black box then the software calculates CFM and velocity (airspeed) which is critical for making power.  Bigger ports are not always better, it's the size and shape which is important.

The flow bench is a vital tool as we can discover which combinations work, such as different port shapes, sizes, different valve angles like the 3 angle, 5 angle, full radius and different shapes on the back of the valve.  

Being able to flow cylinder heads at very high pressure's  enables us to see much more of what's actually happening with the heads rather than flowing at some of the lower industry standard pressure's or less.  At higher test pressures we can approach flow separation amongst other things with more understanding and caution. Every new or re-designed cylinder head takes around 1 month to fully optimise including dyno time. The shape of the valve,  seat combination and port size are all closely related.  Once the desired shape has been made we can replicate it to your cylinder heads with a short turn around time. Everything that is developed and tested ends up on the gas flow and prices page.


748 Airflow Graph

The cylinder heads are measured before, during and after testing. The software is able to produce airflow and velocity graphs to enable the operator to clearly see the improvements or losses made.

Performance Seat Cutting

The peg fm1 is a precision piece of  machinery that can cut any seat angle you want to any depth in a short amount of time.  CJS cuts each angle separately for development work and when the optimum angle for each type of head and valve combo is found, a special 3-5 angle profile blade is then manufactured saving labour costs to the customer. The peg is also used to remove worn seat inserts and install larger higher performance ones.

 

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