I noticed that the compression ration of the MC engine is higher than the MCS. Does this mean that using higher octane gas is even more important for the MC than the MCS?
Also, logically it seems to me that engines w/ higher compression ratio's are under a greater 'strain' so to speak, is there any correlation to engine life to compression ratio?

Thanks

 

MCS static CR is much lower because of the increase in effective CR when under boost generated by the supercharger. Effective CR under full boost (stock) with the MCS is well upwards of the 10.6:1 CR of the MC (probably approaching 13:1 or more). Pulley-equipped cars running higher boost levels are seeing even higher effective CRs. And the S motor is built accordingly.

Marty

 

Thanks. Seems then, that the CR numbers they give for SC vehicles (and turbo's etc.) have little to no value.