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Home  »  Engine, Transmission, wheels/Tyres and Heating/Cooling  »  ENGINES and COMPONENTS  »  CYLINDER HEAD COMPONENTS  »  VALVE SPRINGS  »  UPRATED VALVE SPRINGS  »  VALVE SPRING SET TR250, 5, 6 HIGH LIFT

VALVE SPRING SET TR250, 5, 6 HIGH LIFT

RTR Upgrade
Part No:
RTR1397

NOT AVAILABLE This part is no longer available

This high quality spring set is intended for use in engines operating at the higher rev range i.e. over 6000RPM and with considerably higher list than standard. No Spacers are required under inner springs.

Consider using aluminium cap RTR1180 with this spring set.

Fitted length at full lift must be checked to ensure springs do not become coil bound.
Standard sets are recommended for Standard and Fast Road camshaft applications when the engine will only be revved to 6000 RPM. See below

General notes
When installing a new cam and/or refurbishing the cylinder head with new valves it is important to ensure the spring pressure is correct for the cam being used and the rev range expected. In addition it is imperative that the springs do not become coil bound on full lift. To ensure this the springs may need to be shimmed or alternative longer/shorter springs chosen. If in doubt purchase a new set of springs. Revington TR offer a range of standard and uprated springs, see below.
Excessive cam wear will occur if springs which are too strong are used. Only use the lowest rate springs required to ensure no valve bounce. This in many cases would mean a high quality standard set.
As a guide 80lb seat pressure and 190lb full lift pressure is normal. For big valves and high lift coupled with high revs, 90lb and 230lb absolute maximum might be reached but this would be in a race situation where the components would be expected to be worn out quite quickly.

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