Motorsport & Performance Automotive Accessories

Microdynamics Smoothcut Engine Rev Limiters
Solid State protection for your engine
You’ve spent a lot of time and money maintaining and improving your engine so why risk destroying your investment by over-revving ?
For very little money, the MicroDynamics range of SmoothCut Over-Rev Limiters can substantially reduce engine wear and save fuel, but most importantly it will protect your engine from accidental severe over-revving.
Specifically designed for petrol engines, the SmoothCut range is compatible with all major types of inductively based breaker or electronic ingnition used on 99% of petrol engined vehicles.
   Electronically regulates max. rpm
   Complete protection to preset limit
   Fully Adjustable
   Fully encapsulated.
   Does not affect performance
   Compact and easy to fit
   Full power to the preset rpm limit
   Supplied with fitting kit & easy to follow instructions.
Perfect for: Performance Cars, Rental Fleets, Driving Schools, Company Fleets and Ordinary Road Users.
Available in two ranges:
Basic - adjustable by screwdriver
VisiScale - with a handy knob and printed scale to give quick and easy adjustments.
Basic
RL3 4, 6 & 8 cyl Set by a 20-turn screwdriver adjustment that covers from 4,000rpm to 14,000 rpm on a 4cyl. ( up to 7.000rpm for 8 cyl. ) The unit may be user or factory set.
RL3LS 4 & 6 cyl Low speed versions of RL3. Adjusts from 2,000 rpm to 6,000 rpm 4 cyl ( 4,000 rpm for 6 cyl. )
RL3HS 8 & 12 cyl High speed versions RL3. Adjustment from 5,000 rpm to 12,000rpm 8 cyl. ( up to 8,000 rpm for 12 cyl )
Visiscale
RL4 4 cyl Set by adjustable knob with printed scale to give quick easy adjustment and rev limiting from 6,000 to 9,000 rpm for 4 cyl. engines.
RL6 6 cyl. 6 cyl version of VisiScale RL4. Adjustable from 5,000 to 8,000 rpm.
RL8 8cyl. 8 cyl Version of VisiScale RL4. Adjustable from 4,500 to 7,500 rpm.
RDS 4cyl Developed specifically for racing schools this unit is identical to the RL4 but with a lower adjustable range: 3,500 to 7,000rpm.

Important Notes
Electronic over- rev limiters can only limit the maximum engine speed when the engine is being driven under its own power. The unit cannot prevent engine overspeed caused by the engine being driven by the wheels or other inertia effects.
SmoothCut units do not operate with Capacitor Discharge (CD) type ignition units. However, these units are very rare nowadays, being restricted to use on some older Porsche cars and on most motorcycles.

Microdynamics Gear Shift Light
The original gear shift indicator and still the best. Install this unit with it’s own ultra bright indicator or fit external lamp and drive right up to optimum revs each and every gear change. The Shift-Light can be user set by using the unique half range switch.