Supercharger: 4-53 Long Bore

The GMC 4-53 Long Bore roots blower was built by GMC for their Detroit 53 series diesel inline engines. The 4-53 Long Bore has an 8.7 inch rotor length, 2 straight cut lobes and runs at higher RPMs than the 71 series. Due to the lobe design this model runs louder than the similar model in the 71 series. The Short Bore version of the 4-53 has a 7.5 inch long rotor.

Company: GMC

Type: Roots

Series 53 Units Include: 8V-53, 6V-53 Long Bore, 6V-53 Short Bore, 4-53 Long Bore, 4-53 Short Bore, 3-53, 2-53

Usage: Street

Availability: Discontinued

Drive Type: Belt

Displacement: 139 c.i.d. / rev. Approx.

Max Continuous Speed (RPM): ~2,500 - 2,800 (unverified)

Self Contained: No

Rotor Length: 8.7 inches

Center Case Height: 5.75 inches