Kits Typically ship within 7-14 Business days - (844) 579-7927
Magnuson 2650 50MM Gilmer Drive

Magnuson 2650 50MM Gilmer Drive

LSX Concepts

SKU: MAG-GILMER-78

$1,900.00 Sale

When you need all the Boost......

This kit is geared towards Drag Racers and Performance enthusiasts seeking Maximum horsepower with 0 belt slip, and true die-hard's who love the classic sound and style of the old GMC Gilmer drive blowers

Installation Requirements:

The following items are required to install the LSX Concepts Magnuson 2650 Gilmer Drive Kit but can be purchased separately

  • ATI LSA/ZL1 Super Damper
    • you will need an aftermarket Damper that will accept a bolt on pulley to the front of the damper using corvette spacing (ATI Part Number #918854)
  • LSA/ZL1 Water Pump
    • you will need an factory GM LSA/ZL1 water pump part number 19180610

Features:

  • Double shear idler pulley mounting greatly reducing idler pulley axle flexing.
  • zero belt slip
  • Supports up to 13 different overdrive pulley combinations in combination with the rear Gilmer pulleys driving the supercharger
  • Compatible with our Corvette Spacing High Mount A/C and Alternator and Power Steering Bracket Kits

What's Included:

  • Billet Aluminum Upper and Lower LSA Gilmer Pulleys (available in three overdrive ratio's)
  • Multiple Idler Pulleys and double shear plates with mounting brackets and attachment hardware
  • 8MM HTD 50MM Wide Drive Belt

Supercharger NOT Included

Proudly Made in The USA....

Over Drive Combinations

Over Drive is obtained using a combination of the Lower Crank Pulley and The Magnuson Gilmer pulleys on the back of the supercharger

Front Jackshaft Pulley X Crank Pulley Rear Blower Pulley Rear Jackshaft Pulley Overdrive SC Speed @6500RPM
30T X 78T 34 32 6% Underdriven 16,225
30T X 78T 32 34 6%
16,900
30T X 78T 32 36 13%
19,100
30T X 78T 30 36 20%
20,280
30T X 78T 30 38 27%
21,500
30T X 86T 32 34 18%
19,950
30T X 86T 32 36 25%
21,125
30T X 86T 30 36 33%
22,500
30T X 86T 30 38 * 41%
* 23,900
30T X 94T 32 34 32%
22,300
30T X 94T 32 36 * 40%
* 23,660
30T X 94T 30 36 * 49%
* 25,200
30T X 94T 30 38 * 57%
* 26,550

* Pulley ratios above 35% should only be used in applications with lower maximum engine speeds (below 6500 RPM)

* Supercharger speeds above 23,000 RPM are not recommended

FAQ's Q: Can I get a smaller upper pulley for the supercharger? A: Unfortunately no, due to the size of the jack-shaft the smallest upper pulley we can use is a 30T which is equivalent to a 3.00 pulley.