Editing Ferrari Colombo engine (section)

==58.8 mm stroke==
[[Image:Ferrari212 motor.JPG|thumbnail|right|[[Ferrari 212]] 2.6&nbsp;L engine]]
[[File:Ferrari Colombo V-12.jpg|thumb|Early road cars had a single carburetor and log manifold as the standard option.]]
[[Image:RL 1958 Ferrari 250 Testa Rossa engine.jpg|right|thumb|Colombo Testa Rossa engine in a 1958 [[Ferrari TR|250TR]]]]
[[Image:1962 Ferrari 250 GTO engine.jpg|right|thumb|Colombo engine in a 1962 [[Ferrari 250 GTO|250 GTO]]]]

The early 166, 195, and 212 cars used Colombo V12s of varying sizes. All shared the same {{cvt|58.8|mm|in|2}} [[Stroke (engine)|stroke]], with 60, 65, and {{cvt|68|mm|in|2}} [[Bore (engine)|bores]] giving displacements of {{cvt|1995|cc|L CID|1}} in the [[Ferrari 166|166]], {{cvt|2341|cc|L CID|1}} in the [[Ferrari 195|195]] and {{cvt|2563|cc|L CID|1}} in the [[Ferrari 212|212]], respectively. Output ranged from {{cvt|105|PS|hp kW|0}} to {{cvt|165|PS|hp kW|0}}.

===250===
One of the most common Colombo engines is the '''250''', which debuted in 1952 in the [[Ferrari 250|250S]] and lasted through the 1963 [[Ferrari 330|330 America]]. It used a {{cvt|73|mm|in|2}} bore with the common Colombo stroke of {{cvt|58.8|mm|in|2}} for a total of {{cvt|2953|cc|L|1}}.

Beginning with the famous 250 TR, "Testa Rossa" racing car, Ferrari began a new series of modifications to the Colombo 250 engine. The spark plugs were moved to the outside of the cylinder head, near the exhausts. This enabled Ferrari to introduce separate individual intake ports to use with the six two barrel Weber carburetors. Four cylinder head bolts per cylinder were introduced (instead of three) to cope with the added power.<ref name="OutsidePlug#1">{{cite web|url=http://www.finesportscars.com/ferrari_cars/250gt_zagato.html|title=Ferrari 250 GT Zagato|publisher=FineSportsCars.com|access-date=2020-05-31|archive-date=2021-01-08|archive-url=https://web.archive.org/web/20210108150916/http://www.finesportscars.com/ferrari_cars/250gt_zagato.html|url-status=dead}}</ref>

These changes eventually were incorporated into the Ferrari road cars, beginning with the 250 GT SWB and the 250 GT Series II Pininfarina cars.<ref name="OutsidePlug#2">{{cite web|url=https://myautoworld.com/ferrari/cars/history/1950s/59-250gt/59-250gt.html|title=Ferrari 250 GT Berlinetta Passo Corto|publisher=myAutoWorld|access-date=2020-05-31}}</ref><ref name="OutsidePlug#3">{{cite web|url=http://collezionebymag.com/portfolio/1961-250-gt-cabriolet-series-ii-by-pininfarina-2341/|title=Ferrari 250 GT Series II Story|publisher=Collezione by MS|access-date=2020-05-31|archive-date=2018-08-27|archive-url=https://web.archive.org/web/20180827143017/http://collezionebymag.com/portfolio/1961-250-gt-cabriolet-series-ii-by-pininfarina-2341/|url-status=dead}}</ref>

===275===
The final {{cvt|58.8|mm|in|2}} Colombo Ferrari was the [[Ferrari 275|275]]. It used a {{cvt|3286|cc|L CID|1}} variant of the V12 with a wide {{cvt|77|mm|in|2}} bore for up to {{cvt|300|PS|hp kW|0}}.