Engine Pulley Ratio Table

The following table provide a crankshaft pulley to accessory pulley ratios. The crankshaft diameter is provided in millimeters and the ratios are already calculated for the accessory pulley. The crankshaft ratio will be entered a "1" in the PicoDiagnostic software followed by the ratio of the accessory.

Alternatively, the pulley diameters can be manually measured and entered as is. The PicoDiagnostic software will determine the ratios based on the diameter input.

Engine	Families	Model Year	Crankshaft Diameter (mm) Enter as 1 in Software	Ratios
									Clockwise From Crankshaft (Rear Plane First)				Clockwise From Crankshaft (Rear Plane First)
				Alternator	MGU	AC Compressor	Water Pump	Power Steering	Tensioner 1	Tensioner 2	Tensioner 3	Fan	Idler 1	Idler 2	Idler 3	Oil Pump (Not Belt Driven )
1.4L Fire NA	FF	2012-	135	2.62		1.34			2.03
1.4L Fire Turbo	Abarth	2012-	135	2.62		1.22			2.03
1.4L Fire Turbo	PF	2013-	135	2.62		1.22			2.03
1.4L Fire Turbo	MP	2016-	135
2.2/2.0L Fiat Diesel	KL	2014-	165	2.95		1.37			2.49				2.58
2.2/2.0L Fiat Diesel	MP	2016-	165	2.95		1.37			2.49				2.58
2.2/2.0L Fiat Diesel	JL	2018-	165	2.95		1.37			2.49				2.58
2.0L GMET4	GA, GU	2016-	144.39	2.7		1.32	1.71		2.23				2.23
2.0L GMET4	JL	2017-	144.39	2.7		1.32	1.71		2.23				2.23
2.0L GMET4	KL, K8	2017-	144.39	2.7		1.32	1.71		2.23				2.23
2.0L GMET4 BSG	JL	2019-	144.39		2.38	1.19	1.7		2.04/2.04	2.23
2.0L GMET4 PHEV	JL, WL	2020-	144.39		2.38		1.7		2.04/2.05
2.0L GMET4 PHEV	K8	2019-	144.39				1.7
2.4L Tigershark	PF, UF, KL	2013-	144.39	2.66		1.2	1.08		2.18				2.03
2.4L Tigershark	VM	2015-	144.39	2.66		1.3	1.08	1.12	2.18				2.03	2.18
2.4L Tigershark	MP	2017-	144.39	2.66
2.4L WGE	MK, JS, JC	2009-	144.39	2.66		1.2	1.08	1.12	2.18				2.03	20.3
2.8L VM	RT	2005-	170.89	3.14		1.54		1.29	2.38				2.39
2.8L VM	JK	2012-	170.89	3.16		1.42		1.2	2.38			1.43	2.19	2.38
3.0L VM	DS	2013-	170.89	3.15		1.25	1.59		2.65				2.38	2.61
3.0L VM	WK	2013-	170.89	3.15		1.25	1.59		2.65				2.61
3.0L VM	JL, JT	2018-	170.89	3.15		1.25	1.59		2.65				2.61
3.2L Pentastar	KL	2014-	148.03	2.72		1.22	1.34		2.32				2.41	2.26		7
3.6L Pentastar	DS	2014-	148.03	2.72		1.23	1.34		2.08				2.26			7
3.6L Pentastar	JK	2012-	148.03	2.72		1.23	1.34	1.31	2.23				2.23	2.23		7
3.6L Pentastar	LX, LA, LC, LD	2014-	148.03	2.72		1.23	1.34		2.08				2.26			7
3.6L Pentastar	RT, JS, JC	2011-	148.03	2.71		1.22	1.35	1.25	2.08				2.25			7
3.6L Pentastar	UF	2015-	148.03	2.72		1.22	1.34		2.32				2.41	2.26		7
3.6L Pentastar	VF	2014-	148.03	2.72		1.22	1.34	1.25	2.08				2.26	2.23		7
3.6L Pentastar	WK, WD	2011-	148.03	2.72		1.22	1.34		2.08				2.26			7
3.6L PSU	JL, JT	2018-	148.03	2.73		1.22	1.34		2.24				2.24	2.24		8.05
3.6L PSU	RU	2017-	148.03	2.72		1.22	1.34		2.32				2.41	2.26		8.05
3.6L PSU	WK, WD	2016-	148.03	2.73		1.23	1.34		2.08				2.27			8.05
3.6L PSU	LX, LA, LD, DS, DT	2018-	148.03	2.72		1.23	1.34		2.08				2.26			8.05
3.6L PSU BSG	DT, JL	2019-	148.03/148.03		2.45	1.23	1.33		2.11	2.08	2.08		2.08			8.05
3.6L PSU PHEV	RU	2016-	148.03				1.34		2.32				2.26			8.05
4.7L V8	DS	2013		2.75		1.26	1.30		2.26			1.3	2.32	2.51
5.7L Hemi	DD, DJ, DP, D2	2011-	158.81	2.75		1.26	1.30	1.2	2.23			1.3	2.23			10
5.7L Hemi	DS, DT	2013-	158.81	2.77		1.26	1.30		2.23			1.3	2.23			10
5.7L Hemi	LX, LA, LC, LD	2011-	158.81	2.80		1.26	1.50		2.23				2.23	2.43		10
5.7L Hemi	WK, WD	2011 - 2014	158.81	2.8		1.31	1.50	1.34	2.23			1.3	2.23			10
5.7L Hemi	WK, WD	2015-	158.81	2.8		1.31	1.50		2.23			1.3	2.23	2.43		10
5.7L Hemi BSG	DT	2019-	181.51 / 158.81		3.00	1.33	1.30		2.55	2.41						10
6.4L BGE (Single Alt)	DD, DJ, DP, D2	2014-	158.81	2.91		1.26	1.30	1.20	2.23			1.3	2.23			10
6.4L BGE (Dual Alt)	DD, DJ, DP, D2	2014-	158.81	2.75 / 2.76		1.26	1.3	1.2	2.23			1.3	2.23			10
6.4L Apache			158.81	2.8		1.32	1.31		2.26				2.26
6.4L Apache (EPS)			158.81	2.8		1.32	1.31		2.26				2.26
6.2L Hellcat	LA, LD	2015-2017	159.9	2.8		1.32	1.31	1.29	2.26				2.26
6.2L Hellcat (EPS)	LA, LD, WK, WD	2018-	159.9	2.8		1.32	1.31		2.26				2.26
6.2L Hellcat Redeye	LA, LD	2018-	159.9	2.8		1.32	1.31		2.26				2.26
6.7L Cummins	DD, DJ, DP, D2	2013-2019	201.49	3.24		1.67	2.39	1.28	2.61			1.24	1.67
6.7L Cummins Upgrade	DD, DJ, DP, D2	2019-	201.5	3.26		1.67	2.4	1.29	2.64			1.24	1.67