Magnuson 2650 50MM Gilmer Drive
LSX Concepts
SKU: MAG-GILMER-78
Regular price
$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 1520MM X 50MM Wide Drive Belt
Supercharger NOT Included
Replacement/Spare belts - Click Here
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 |
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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.