|
|
|
OCTANE RATING CHART
|
Compression
|
Octane rating
|
| Up to 180 psi. |
93 s.u. pump gas |
| 180 - 200 psi |
100 |
| 200 - 210 psi. |
105 |
| 210 - up |
112 or higher |
TIMING DEGREE CONVERSION CHART
| Degree
|
550 |
650 |
750 |
| 17 |
.065 |
.079 |
.079 |
| 18 |
.075 |
.089 |
.088 |
| 19 |
.085 |
.099 |
.099 |
| 20 |
.095 |
.109 |
.110 |
| 21 |
.105 |
.119 |
.123 |
| 22 |
.115 |
.130 |
.134 |
| 23 |
.125 |
.148 |
.144 |
| 24 |
.135 |
.159 |
.158 |
| 25 |
.145 |
.169 |
.169 |
| 26 |
.155 |
.175 |
.181 |
| 27 |
.165 |
.195 |
.197 |
| 28 |
.175 |
.210 |
.213 |
| |
|
|
|
RECOMMENDED TIMING CHART
| Stock
timing
|
Recommended Timing
|
| 440 P.P. all 28
deg |
26 - 28 |
| 550 P.P. 82-85 28 deg |
26 - 28 |
| 550 P.P. 86-90 21 deg |
26 - 28 |
| 550 reed Kawa. 21 deg |
26 - 28 |
| 650 all
21 deg |
21 - 25 |
| 750 total loss |
21 - 24 |
|
|
