Difference between revisions of "Astron II"
From Mitsipedia
Jump to navigationJump to searchCartman02au (talk | contribs) |
Cartman02au (talk | contribs) |
||
| Line 143: | Line 143: | ||
These changes increased power to 98 kW at 4750 rpm (103 kW when running on premium unleaded) and torque rose to 212 Nm at 3750 rpm. | These changes increased power to 98 kW at 4750 rpm (103 kW when running on premium unleaded) and torque rose to 212 Nm at 3750 rpm. | ||
| − | Revised Astrons can be identified by their knock sensor situated under the fuel injection plant (original Astron II's do not even have a hole for it), its engine number (all are prefixed by W531 or W532) or the casting number on the head (M6 through M9). The M6 | + | Revised Astrons can be identified by their knock sensor situated under the fuel injection plant (original Astron II's do not even have a hole for it), its engine number (all are prefixed by W531 or W532) or the casting number on the head (M6 through M9). The M6 and M7 were used in the TR Magna. |
| − | With the release of the [[Second Generation Magna|TS Magna]], the Astron II was modified once again with a switch to the M9 head which used "kidney shaped" combustion chambers with dished top pistons (to match the combustion chambers). | + | With the release of the [[Second Generation Magna|TS Magna]], the Astron II was modified once again with a switch to the M8 and M9 head which used swirl-type "kidney shaped" combustion chambers with dished top pistons (to match the combustion chambers). These promoted better mixing of air and fuel, less detonation (knocking) and a better flame front. |
| − | The M6 through | + | The M6 through M7 head is said to be the best Astron II head - using the largest valves, ports and having good flow characteristics. The M9 head while similar has less desirable flow through the intake ports due to the shape of the combustion chamber. |
{| | {| | ||
