Re: Are there any good 4 cylinder I/O engines?
I'm pretty sure it's basically a 230 6cyl with the front 2 cyls lopped off. Same bellhousing bolt pattern as the V8's. They saw extensive use in midgets [ lots cheaper than offy's ]. Clifford 6=8 used to supply different intakes, both downdraft for Holley 2bbls and sidedraft types for a pair of Weber DCOE's.<br /><br />In boats the 120hp was the basic 153 CI Chevy II motor. The 140hp was a 181 that Merc made or had GM make for them. Lots better ports in the head.<br /><br />The early Vegas used an alloy block with no liners, special plated pistons, and an iron head. Special honing process to leave a silicon surface for the rings to bear on. Worked for Can Am cars, didn't work for production line cars.<br /><br />The later Vegas, Astres, Sunfires, Fieros et al used a motor not too different from the Merc 140 hp marine motor. The Pontiac Super Duty 4 cyl was based on this design but with EVERY part substantially beefed up.
I'm pretty sure it's basically a 230 6cyl with the front 2 cyls lopped off. Same bellhousing bolt pattern as the V8's. They saw extensive use in midgets [ lots cheaper than offy's ]. Clifford 6=8 used to supply different intakes, both downdraft for Holley 2bbls and sidedraft types for a pair of Weber DCOE's.<br /><br />In boats the 120hp was the basic 153 CI Chevy II motor. The 140hp was a 181 that Merc made or had GM make for them. Lots better ports in the head.<br /><br />The early Vegas used an alloy block with no liners, special plated pistons, and an iron head. Special honing process to leave a silicon surface for the rings to bear on. Worked for Can Am cars, didn't work for production line cars.<br /><br />The later Vegas, Astres, Sunfires, Fieros et al used a motor not too different from the Merc 140 hp marine motor. The Pontiac Super Duty 4 cyl was based on this design but with EVERY part substantially beefed up.
