Gear ratios and diffs

Kaufmann's gearbox list

	Dog51	Dog52	Dog53	Sync5	KAD5	STD4
1^st	2.315	2.240	2.165	2.544	2.616	3.520
2^nd	1.568	-	-	1.731	1.989	2.220
3^rd	1.195	-	-	1.258	1.671	1.430
4^th	1.000	-	-	1.000	1.294	1.000
5^th	0.915	0.955	0.955	0.877	1.000	-
diff	3.67	3.67	3.67	3.67	3.2	3.2
.	(3.44)	(3.44)	(3.44)	-	-	-

Diff say what ratio I recommend for a 100 HP engine and the max speed at 6200-6700 rpm. For less HP use a "shorter" diff like 3.44 for STD gearbox. The 5 gear synchromesch is the right one for allround purpose, good low speed ratio and good at top end. My new racer has a Sync5LSD3.67 gearbox and I think it is the right one for race and ralling.

Walter Kaufmann

Published on the Mini List, Summer 1998