No Blower in this model?

[ximm]

As title

[ilias.tselios]

Not clear what you are asking. May be you mean if the R-1830-S1C3-G has a blower or has a 2-speed blower?

This engine has a single speed (7.15:1 ratio) blower. So no controls to select speed. Later Twin Wasps (R-1830-92 I think) used in C47s had a 2-speed blower.