LSA Supercharger Upper/Lower Pulley & Belt Guide
Upper pulleys.. lower pulleys.. tensioners.. idlers and of course, BELTS! In the never ending search for the most boost at the lowest heat level we have to play the mix and match game to ensure our belt-train powering our LSA supercharger is working at its sweet spot. This guide is meant to help you in your LSA supercharger pulley selection, belt and idler selection. It's important to understand a few things about this matrix before you get rolling:
- All of this data applies to the stock LSA cubic inches
- The faster you spin a supercharger the hotter it gets and the more strain is put on its components. A faster spin rate is not always better so: 1) pushing stock LSA blowers past 23,000 RPM is not recommended. and 2) pushing the stock LSA blower belt train over a 35% overdrive level is also not recommended and 3) using an idler smaller than 50mm is not recommended as it may over stress the bearings.
- This is a guide - XtremeCFM takes no responsibility in how you use it, how your motor likes and/or how many times you gap (or get gapped) after reading it.
- If you're curious how the upper and lower pulley choices affect boost levels check out our LSA blower boost calculator.
Here are the stock sizes for the components so when you see "stock" in the table cell it'll be clear what it means:
LSA Stock Supercharger Sizes / Dimensions
|Crank Pulley (Lower)||7.8"|
|Supercharger Pulley (Upper)||3.0"|
|Supercharger Spin Rate||16,900 RPM|
LSA supercharger pulley matrix
|Crank Pulley [Overdrive %]||LSA Supercharger Pulley||Belt P/N||Upper Idler||Lower Idler||Total Overdrive %||LSA Blower Speed|
|Stock (7.8") [0%]||3.0" (stock)||12628026 (stock)||90mm (stock)||70mm (stock)||0%||16,900 RPM (stock)|
|8.25" [6%]||3.0"||12628026||90mm||70mm||6%||17,900 RPM|
|8.66" [11%]||3.0"||K080675||90mm||70mm||11%||18,800 RPM|
|9.17" [18%]||3.0"||K080675||90mm||70mm||18%||19,900 RPM|
|9.55" [23%]||3.0"||K080685||90mm||70mm||23%||20,700 RPM|
|10.0" [28%]||3.0"||K080700||90mm||70mm||28%||21,700 RPM|
GripTec ZPE MKII Hub (LSA/LS9/LT4/LT5) Blower PulleysGripTec ZPE MKII Hub (LSA/LS9/LT4/LT5) Blower Pulleys$58.95$58.95
GripTec LSA / ZL1 Blower Pulley (For ZPE Hub)GripTec LSA / ZL1 Blower Pulley (For ZPE Hub)$157.95$157.95
GripTec LS9/ZR1 Blower Pulley (For Lingenfelter LPE Hub)GripTec LS9/ZR1 Blower Pulley (For Lingenfelter LPE Hub)$167.95$167.95
GripTec LT4 Blower Pulley (For ZPE Hub)GripTec LT4 Blower Pulley (For ZPE Hub)$167.95$167.95
GripTec LS9 / ZR1 Blower Pulley (For ZPE Hub)GripTec LS9 / ZR1 Blower Pulley (For ZPE Hub)$167.95$167.95
GripTec LSA Blower Pulley (For Lingenfelter LPE Hub)GripTec LSA Blower Pulley (For Lingenfelter LPE Hub)$157.95$157.95
GripTec ZPE MKII Hub for Hellcat Blower PulleysGripTec ZPE MKII Hub for Hellcat Blower Pulleys$98.95$98.95
GripTec V2 Hellcat Blower Pulley (For ZPE Hub)GripTec V2 Hellcat Blower Pulley (For ZPE Hub)$177.95$177.95
GripTec LT5 / ZR1 Blower Pulley (For ZPE Hub)GripTec LT5 / ZR1 Blower Pulley (For ZPE Hub)$177.95$177.95
GripTec Whipple Blower PulleyGripTec Whipple Blower Pulley$157.95$157.95
- Choosing a selection results in a full page refresh.