Wiseco Top Ring Gap
Posted: Sun Feb 22, 2015 2:24 pm
Author: FOZ1A
As above, i'm running 70mm (1015) wisecos, anyone know what the gap is for the top ring?
Thanks
foz
Posted: Sun Feb 22, 2015 2:51 pm
Author: z1000puddin
0.004"
Stu
Posted: Mon Feb 23, 2015 10:15 am
Author: Z903
A.
Wiseco 4-cycle Powersports piston rings are designed with the proper end gap for most applications. Because 4-cycle engines contain two and three rings, the end gaps do require different values depending on the ring. This chart will help illustrate the minimum ring end gaps:
Measurements are for Top ring, 2nd ring, Oil rail
Most standard engines 0.004 0.005 0.015
Modified engines or Nitrous Oxide 0.005 0.0055 0.015
High performance racing 0.0055 0.0053 0.015
Racing with Nitrous / Turbo 0.006 0.0057 0.015
Blower / Forced induction 0.007 0.0063 0.015
Multiply your bore size in inches times the value on the table (to convert metric bore to inches, divide your metric bore x 25.4. For example, 77mm divided by 25.4 = 3.0314â€, multiply this times the value on the chart).
Note: If your piston contains only a top ring and oil set, simply omit the second ring requirements