Syncro Tire and Gear Ratios Dd
16
Tire Circ. R&P ratio 6.75 ft 5.42 25.79 in Gear Ratio Granny First Second Third Fourth Reverse RPM 6.03 3.78 1.88 1.080 0.85 6.03 10.0 15.9 29.3 49.2 70.9 10.0 0 0.00 0.00 0.00 0.00 0.00 0.00 500 1.17 1.87 3.76 6.55 8.33 1.17 1000 2.35 3.74 7.53 13.11 16.65 2.35 1500 3.52 5.62 11.29 19.66 24.98 3.52 2000 4.70 7.49 15.06 26.21 33.31 4.70 2500 5.87 9.36 18.82 32.77 41.64 5.87 3000 7.04 11.23 22.59 39.32 49.96 7.04 3200 7.51 11.98 24.10 41.94 53.29 7.51 Derek Drew's "How To Select Gear Ratios For VW Syncro (T3, Transporter, Vanagon) 1996- Instructions: To use this chart look up the revolutions per mile given to y hour. Make sure a MPH figure is given to you to make sure it is a legitimate revolutions per mile and find the equivalent "effective tire height" in colum column D. You can cheat by looking up the revolutions per mile number for the accurate. Next, input your ring and pinion ratio in row 8, Column G. For sync 5.83, 4.57, 6.17). If you are in North America most likely you have 4.86 to s 5.42. Changing to 6.17 has definite advantages for syncro so consider that in In row 19, column D, you can enter either 1.88 or 2.06 only. Likely you have Enter any number you want in row 19, columns e and f. For most users, start b rpm, depending on whether you want to have more ultimate top speed (75mph) or general, it is good to shove G and 1st down as low as you can get them by cha column G, and then set 4th gear, and then set 2nd and 3rd as close as you can litre motors (MV, WBX 2.1L Digifant) at 4,000 rpm is documented in row 20. Af [email protected] and I can help review your chart and also obtain the gears. generally stock. The most readily available 4th gears to input into row 19, c 0.85 (which last ratio is stock.) We also have some 0.75s available temporari for 3rd and 4th you want if you are willing to wait about six months. This ch et. Al. and was substantially revised in May of 2003 by Derek Drew to simplif tool. [email protected] Powerful diesels can use lower ring and pinion ratios than WBX. Powerful gasoline engines (Subaru, Audi, 3.2L WBX) can let 4th gear drift to the slightly higher than the recommended maximum number for row 30, column F of 75mph. Diam. From Column L OEM At 4,000 RPM
Transcript of Syncro Tire and Gear Ratios Dd
Tire Circ. R&P ratio6.75 ft 5.42
25.79 in
Gear RatioGranny First Second Third Fourth Reverse
RPM 6.03 3.78 1.88 1.080 0.85 6.03
10.0 15.9 29.3 49.2 70.9 10.00 0.00 0.00 0.00 0.00 0.00 0.00
500 1.17 1.87 3.76 6.55 8.33 1.171000 2.35 3.74 7.53 13.11 16.65 2.351500 3.52 5.62 11.29 19.66 24.98 3.522000 4.70 7.49 15.06 26.21 33.31 4.702500 5.87 9.36 18.82 32.77 41.64 5.873000 7.04 11.23 22.59 39.32 49.96 7.043200 7.51 11.98 24.10 41.94 53.29 7.51
Derek Drew's "How To Select Gear Ratios For VW Syncro (T3,
Transporter, Vanagon) 1996-1992"Instructions: To use this chart look up the revolutions per mile given to you by your tire manufacturer at a given miles per hour. Make sure a MPH figure is given to you to make sure it is a legitimate number. Then look down column K to find that revolutions per mile and find the equivalent "effective tire height" in column L. Once you have that number, input it in the row 9, column D. You can cheat by looking up the revolutions per mile number for the tire sizes in column J but doing that will be less accurate. Next, input your ring and pinion ratio in row 8, Column G. For syncro, that ratio can be one of these only (5.43, 4.86, 5.83, 4.57, 6.17). If you are in North America most likely you have 4.86 to start and if in South Africa then most likely you have 5.42. Changing to 6.17 has definite advantages for syncro so consider that in conjunction with the switch to larger diameter tires. In row 19, column D, you can enter either 1.88 or 2.06 only. Likely you have 2.06 now. Entering 1.88 there is expensive because you have to change the mainshaft to change to 1.88.
Enter any number you want in row 19, columns e and f. For most users, start by making 4th gear between 70mph and 75mph at 4,000 rpm, depending on whether you want to have more ultimate top speed (75mph) or whether you want to go up hills faster (70mph). In general, it is good to shove G and 1st down as low as you can get them by changing the ring and pinion ratio to 6.17 at row 8, column G, and then set 4th gear, and then set 2nd and 3rd as close as you can to the factory OEM setup. The OEM setup for 2.1 litre motors (MV, WBX 2.1L Digifant) at 4,000 rpm is documented in row 20. After you know what Gears you want, email me at [email protected] and I can help review your chart and also obtain the gears. When you are done, eyeball the difference between row 20 and row 30 to make sure nothing seems too out of whack.
The most readily obtainable 3rd gears to input into row 19 and column E are 1.08, 1.14, and 1.17 and 1.225 is generally stock. The most readily available 4th gears to input into row 19, column F are 0.70, 0.77, 0.82, and 0.85 (which last ratio is stock.) We also have some 0.75s available temporarily. You can make any other ratio for 3rd and 4th you want if you are willing to wait about six months. This chart is by Tim Smith, Derek Drew, et. Al. and was substantially revised in May of 2003 by Derek Drew to simplify its use as a gear selector tool. [email protected]
Gearing advice here assumes you have a 2.1 litre WBX motor. Powerful diesels can use lower ring and pinion ratios than WBX. Powerful gasoline engines (Subaru, Audi, 3.2L WBX) can let 4th gear drift to the slightly higher than the recommended maximum number for row 30, column F of 75mph.
Diam. From Column L
OEM At 4,000 RPM
3500 8.22 13.11 26.35 45.88 58.29 8.224000 9.39 14.98 30.12 52.43 66.62 9.394200 9.86 15.73 31.62 55.05 69.95 9.864500 10.56 16.85 33.88 58.98 74.94 10.565000 11.74 18.72 37.65 65.54 83.27 11.745200 12.21 19.47 39.15 68.16 86.60 12.215500 12.91 20.60 41.41 72.09 91.60 12.916000 14.09 22.47 45.18 78.64 99.92 14.096500 15.26 24.34 48.94 85.20 108.25 15.267000 16.43 26.21 52.71 91.75 116.58 16.43
Make this number as low as possible by inputting a ring and pinion ratio at row 8, column G.
Make this number near to the OEM number of about 49-50mph. Not a critical number!
Make this number 70-75 depending on whether you want more ultimate top speed (75) or to be able to go up steep hills better (70).
Experiment with this number so that it comes closest to the OEM 29.3mph by inputting 1.88 or 2.06 at row 19, column D. If you are not a lot better off with the 1.88, then you can sometimes save $$ by sticking with your OEM 2.06.
Start Here
Rev. Per Mile 205/70/14 836782.0 195/75/14 or 205/70/14 819
195/75R14 811195R14 797
27x8.50/14 or 225/70/14 782765
195/75/15 755
750215/75r15 748
747~idle 746
744215/70r16 743
Green on Tach 235/75/15 739225/70r16 730
PEAK TORQUE 725
To use this chart look up the revolutions per mile given to you by your tire manufacturer at a given miles per hour. Make sure a MPH figure is given to you to make sure it is a legitimate number. Then look down column K to find that revolutions per mile and find the equivalent "effective tire height" in column L. Once you have that number, input it in the row 9, column D. You can cheat by looking up the revolutions per mile number for the tire sizes in column J but doing that will be less accurate. Next, input your ring and pinion ratio in row 8, Column G. For syncro, that ratio can be one of these only (5.43, 4.86, 5.83, 4.57, 6.17). If you are in North America most likely you have 4.86 to start and if in South Africa then most likely you have 5.42. Changing to 6.17 has definite advantages for syncro so consider that in conjunction with the switch to larger diameter tires. In row 19, column D, you can enter either 1.88 or 2.06 only. Likely you have 2.06 now. Entering 1.88 there is expensive because you have to change the mainshaft to change to 1.88.
Enter any number you want in row 19, columns e and f. For most users, start by making 4th gear between 70mph and 75mph at 4,000 rpm, depending on whether you want to have more ultimate top speed (75mph) or whether you want to go up hills faster (70mph). In general, it is good to shove G and 1st down as low as you can get them by changing the ring and pinion ratio to 6.17 at row 8, column G, and then set 4th gear, and then set 2nd and 3rd as close as you can to the factory OEM setup. The OEM setup for 2.1 litre motors (MV, WBX 2.1L Digifant) at 4,000 rpm is documented in row 20. After you know what Gears you want, email me at [email protected] and I can help review your chart and also obtain the gears. When you are done, eyeball the difference between row 20 and row 30 to make
The most readily obtainable 3rd gears to input into row 19 and column E are 1.08, 1.14, and 1.17 and 1.225 is generally stock. The most readily available 4th gears to input into row 19, column F are 0.70, 0.77, 0.82, and 0.85 (which last ratio is stock.) We also have some 0.75s available temporarily. You can make any other ratio for 3rd and 4th you want if you are willing to wait about six months. This chart is by Tim Smith, Derek Drew, et. Al. and was substantially revised in May of 2003 by Derek Drew to simplify its use as a gear selector tool.
Cheat column for those too lazy to find out the revs per mile of their tires. (you lazy bumb!)
Equivalency Key (Input Result From Column L In Space D9)
Typical Tire Sizes For This Revs Per Mile
Revolutions Per Mile Of Your Intended Tire (check with your tire manufacturer!)
Compare row at left with your selections below in row 30 to see how close you can get and if you differe know why you are doing that.
723Effective top speed for WBX 2.1 721Green on Tach 719
235/75r15 717235/70/16 715
714Redline 712
711710709708
Make this number as low as possible by inputting a ring and pinion ratio at row 8, column G. 225/75r16 707
30x9.50/15 706
245/70/16 705700691685684682
245/75R16 680675673668660657656655
235/85/16 654653650647
Try to start here and not here.
24.1224.6224.8725.3125.7926.3626.71
26.8926.96
2727.0327.1127.1527.2927.6327.82
Effective Tire Height (Actual tire height is usually about 1" taller than this).
27.8927.9728.0528.1328.2128.2528.3328.3628.4128.4528.4928.53
28.57
28.6128.8129.1929.4429.4929.57
29.6629.8829.9730.1930.56
30.730.7430.79
30.8430.8931.0331.17
Note that this is the largest advisable tire height for syncro without changing your trailing arms to 16" type.
Note that this is the largest advisable tire height for syncro.
Note that the tire at right does not really fit in the syncro although some have forced the issue.
Rev/ Tire Size Inflated Inflated Tire Name
Mile Tires Are Almost Dimensions
Overall OverallWidth Diameter
(Inches) (Inches)
*215/85R16
647 7.50R16 8.7 32.1
650 235/85R16 9.3 31.9
650 235/85R16 9.3 31.9
650 7.50R16 9.1 31.9
653 235/85R16 9.4 31.8
652 7.50R16 -- 31.6
654 235/85/16 9.3 31.8
654 7.50R16 -- 32.1
654 235/85R16 9.4 31.8
654 235/85R16 9.6 31.7654
235/85R16 9.29 31.9
655 7.50R16 8.7 31.8
656 235/85R16 9.3 31.7
657 235/85R16 9.3 31.7
660 235/85R16 9.3 31.7
668 235/85/16 9.2 31.8
Dimensions
All Light Truck (LT)
Yokahama GelanderAT
Yokahama Super-Digger
IV(Y811)
Yokahama Super-Digger
IV(Y811)
Yokahama Super-Digger
IV(Y811)
Cooper Discoverer LTPirelli Scorpian
A/TMichelin (exact tire unknown)BF Goodrich
All-Terrain T/A KO
Land Rover Tires; exact tire
unknown
Cooper Discoverer LT
Cooper Discoverer LT
Cooper Discoverer ST
Dayton Timberline A/T
Dayton Timberline A/T
Dayton Timberline A/T
Yokahama GelanderAT
Dunlop Radial Rover RT
673 7.50/16 8.9 31.7
673 235/75R15 9.3 28.9
675 245/75R16 9.4 30.7
675 245/75R16 9.4 30.7
680 245/75R16 9.7 30.6
682 215/85R16 8.3 30.5
682 215/85R16 8.3 30.5
682 215/85R16 8.9 30.4
684 215/85R16 9.1 30.3684
215/85R16 8.41 30.48
685 215/85R16 8.5 30.4
691 215/85/16 8.7 30.5
700 235/70R16 9.5 29
703 245/70/16 9.7 29.6
705 30x9.50/15 9.4 29.5
706 30x9.50R15 9.5 29.5
707 225/75r16 8.8 29.4
708 225/75R16 8.6 29.3
708 30x9.50R15 9.3 29.3
708 225/75R16 9.1 29.4
Dunlop Radial Rover RT
Pirelli Scorpian A/T
Cooper Discoverer LT
Cooper Discoverer LT
BF Goodrich All-Terrain
T/A KO
Yokahama Super-Digger
IV(Y811)
Yokahama Super-Digger
IV(Y811)
Cooper Discoverer LT
Cooper Discoverer LT
Cooper Discoverer ST
Dayton Timberline A/TDunlop Radial
Rover RTPirelli Scorpian
A/TBF Goodrich
All-Terrain T/A KO
BF Goodrich All-Terrain T/A
KODayton
Timberline A/TBF Goodrich
All-Terrain T/A KO
Cooper Discoverer LT
Cooper Discoverer LTPirelli Scorpian
A/T
708 30X9.50R15LT 9.63 29.35
709 225/75R16 8.8 29.4
709 30x9.50R15 9.6 29.5
710 225/75R16 8.9 29.2710
225/75R16 8.54 29.35
711 225/75R16 8.8 29.3
712 235/75R15 9.2 29.1
714 225/75R16 8.8 29.3
715 235/70/16 9.5 29.1715
235/75R15 9.14 28.62
717 235/75r15 9.1 29
717 205/R16 8.1 28.9717.25
30 x 9.50-15LT 9.8 29
719 235/75R15 8.9 28.9
721 235/75R15 9.3 28.9
723 235/75R15 9.3 28.9
725 225/75/16 8.7 29.3
730 225/70r16 8.9 28.5
737 235/75/15
Cooper Discoverer STBridgestone Dueler A/TYokahama
GelanderAT
Cooper Discoverer LT
Cooper Discoverer ST
Dayton Timberline A/T
Yokahama Super-Digger
IV(Y811)
Yokahama GelanderAT
BF Goodrich All-Terrain T/A
KOCooper
Discoverer STBF Goodrich
All-Terrain T/A KO
Cooper Discoverer LT
Mickey Thompson Baja
Beltedcalculated!
Cooper Discoverer LTBridgestone Dueler A/TYokahama
GelanderAT
Dunlop Radial Rover RT
BF Goodrich All-Terrain T/A KO
Michelin LT XMS
Largest Size Driven By List
737 235/75/15
Note:
739 235/75/15 9.2 28.8742.8
29 x 9.50-15LT 9.7 28
743 215/70r16 8.7 28
744 215/75R15 8.7 27.9
746 215/75R15 8.15 27.8
747 215/70R16 8.2 27.9
748 215/75r15 8.4 27.8
4.86 Gears;
15” Wheels;
For Westfalias
750 215/75R15 8.5 27.7
755 215/75R15 8.5 27.7
Member Who Says He Likes
That Size With Stock Motor
AndStock 4.86 Final
Drive
With Lightweight
Pickup Version!
Dunlop Radial Rover RT
Mickey Thompson Baja
Beltedcalculated!
BF Goodrich All-Terrain T/A KO
Yokahama Super-Digger
IV(Y811)
Cooper Discoverer LTBridgestone Dueler A/T
BF Goodrich All-Terrain T/A
KODerek’s
Alternate 2nd Best
Recommendation For Stock
For List Members With
Consider ECU & Ratio
Rocker Power Upgrade
For Engine, Especially
Pirelli Scorpian A/T
Yokahama GelanderAT
755 195/75/15 Michelin LTX
765 195/R15REINF. 7.7 27.1
779 27x8.50/14
782 27x8.50/14 8.5 26.6
782 27x8.50R14 8.7 26.5
783 225/70/14 9 26.6
797 195/75R14 7.5 26797
195R14797
195R14
811 195/75R14 7.9 27.9
815 195/75/14
819 205/70/14836 205/70/14 Michelin MXT
Cooper Discoverer LT
BF Goodrich All Terrain Radial
Pre-KO Version From 1990s
BF Goodrich All-Terrain T/A
KODerek’s
Recommendation
For Stock 4.86 GearsCooper
Discoverer LTBridgestone
Winter DuelersCooper
Discoverer LTVredestein: Transport
Snow
Nokian Hakka CS
Bridgestone Dueler A/T
Vredestein: Transport
Snow
Stock North American
Michelin MXL
Rim
Width
Appr.(Inches)
5.5-7.0
5.5-7.0
6.0-7.0
6.0-7.0
5.50 - 7.00
6.0 - 7.0
--
5.5-7.0
6.00 - 7.00
6.00 - 7.00
(6.0) 5.5-7.0
(6.0) 6.0-7.0
(6.5) 6.0-7.0
6.0-7.0
6.00 - 7.00
6.0-7.0
6.50 - 7.00
6.50 - 7.00
6.5 – 7.5
5.5-7.0
5.5-7.0
5.50 - 7.00
5.50 - 7.00
(6.0) 5.5-7.0
6.0-8.0
6.5-7.5
(7.5) 6.5-8.5
6.00 - 7.00
6.50 - 8.50
6.0 - 7.0
5.50 - 7.00
(6.0) 6.0-7.0
6.5-8.5
6.00 - 7.00
(6.0) 6.0-7.0
6.0-7.0
6.0-7.0
5.50 - 6.50
6.5-8.5
6.00 - 7.00
(6.5) 6.0-7.0
6.0-7.0
6.50 - 8.50
6.00 - 7.00
6.00 - 7.00
6.5-8.5
5.5-7.0
5.50 - 7.00
(6.0) 6.0-7.5
5.5-7.0
5.5-7.0
5.00 - 6.00
6.00 - 7.50
5.00 - 6.00
(5.5) 5.0-6.0
