User Manual

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Table 1 - belt length and idler pulley diameters required for different LSA supercharger pulley and damper pulley combinations.
Crank Pulley
PN
(Crank only OD%)
Supercharger
Pulley
Supercharger
Pulley PN
Belt Belt PN Upper Idler Lower Idler
Idler Bracket
(PN)
Pulley
Ratio
Total
OD%
SC Speed @
6500 RPM
stock 7.8”
(L220646509)
-
(0%)
stock 3.0” - stock 1680mm 12628026
stock 90 mm stock 70 mm stock
2.6 N/A 16,900
2.55” press-on L220030709 1655mm/65.2” 8PK1655 3.1 18% 19,900
2.55” 10 bolt L220300709 1655mm/65.2” 8PK1655 3.1 18% 19,900 2.38” 10 bolt L220310709 1643mm/64.5” K080645 3.3 26% 21,300
8.25”
L220060709
(6%)
stock 3.0” - stock 1680mm 12628026 stock 90 mm
stock 70 mm stock
2.8 6% 17,900
2.55” press-on L220030709 66.0” K080660 stock 90 mm 3.2 25% 21,000
2.55” 10 bolt L220300709 66.0” K080660 stock 90 mm 3.2 25% 21,000 2.38” 10 bolt L220310709 stock 1680mm 12628026
LPE 100 mm,
0.350” spacer,
M10x1.5x60mm
cap head screw
3.5 34% 22,500
8.66”
L220070709
(11%)
stock 3.0” - 67.5” K080675
stock 90 mm stock 70 mm stock
2.9 11% 18,800
2.55” press-on L220030709 67.0” K080670 3.4 31% 22,100
2.55” 10 bolt L220300709 67.0” K080670 3.4 31% 22,100 2.38” 10 bolt L220310709 - - 3.6 40% 23,700
9.17”
L220170709
(18%)
stock 3.0” - 67.5” K080675
stock 90 mm stock 70 mm
LPE
(L220636509)
3.1 18% 19,900
2.55” press-on L220030709 67.0” K080670 3.6 38% 23,400
2.55” 10 bolt L220300709 67.0” K080670 3.6 38% 23,400 2.38” 10 bolt L220310709 - - 3.9 48% 25,000
9.55”
L220290709
(23%)
stock 3.0” - 68.5” K080685
stock 90 mm stock 70 mm
LPE
(L220636509)
3.2 23% 20,700
2.55” press-on L220030709 67.5” K080675 3.8 44% 24,300
2.55” 10 bolt L220300709 67.5” K080675 3.8 44% 24,300 2.38” 10 bolt L220310709 67.5” K080675 4.0 54% 26,000
10.0”
L220380709
(28%)
stock 3.0” - 70.0” K080700
stock 90 mm stock 70 mm
LPE
(L220636509)
3.3 28% 21,700
2.55” press-on L220030709 68.5” K080685 3.9 51% 25,500
2.55” 10 bolt L220300709 68.5” K080685 3.9 51% 25,500 2.38” 10 bolt L220310709 68.5” K080685 4.2 62% 27,300
9.73” 10 rib
L220450709
-
(requires 10 rib
tensioner pulley)
2.70” 10 rib XX03873-0004 67.5” K100675
LPE 76 mm,
0.350 spacer,
M10x1.5x60mm cap
head screw
LPE 76 mm,
0.200 spacer,
M10x1.5x60mm cap
head screw
LPE
(L220636509)
3.5 35% 22,800
Supercharger speeds above 23,000 RPM are not recommended. To calculate supercharger speed, multiply your maximum engine speed by the pulley ratio value listed above. Pulley ratios above 35% should only be used in applications with proportionally lower maximum engine speeds (below 6500 RPM). For applications where the crank pulley diameter is greater than or equal to 9.17”, LPE idler relocation bracket (PN: L220636509) is required in order to provide enough clearance between the crank pulley and the lower idler pulley. For bearing durability reasons LPE does not recommend using idler pulleys smaller than 70mm. An LPE idler pulley is required for these pulley/belt combinations.
LSA Pulley Sheet v1.1.indd
5.