Are there any underdrive pullies available?
Unorthodox Racing makes underdrive pullies however it is not recommended to use any underdrive crank pullies from any company at all because it can cause oil pump failures. All Protege engines are directly crank driven and if an under- drive crank pulley is used, it can cause accelerated wear in it which will event- ually lead to failure! Typical underdrive crank pullies do not have a harmonic balancer and therefore all the oscillating forces from the crankshaft are transmitted elsewhere. Even on the typically well balanced stock crankshafts, there is always a very slight imbalance in them and as such the forces caused by them results in the oscillations. Many turbo Miata engines have blown up from oil pump failures due to the installation of underdrive crank pullies. Be warned!
