71,744
edits
Difference between revisions of "BMW R25"
Jump to navigation
Jump to search
m
Robot: Automated text replacement (-air filter +air filter)
m (Robot: Automated text replacement (-air filter +air filter)) |
|||
| Line 3: | Line 3: | ||
The idea behind the long inlet tract, starting at the front of the bike just beneath front right hand side, of the fuel tank, was to add [[horsepower]]. The air filter and choke let air into that long, curved pipe, and that long induction system actually boosted performance. | The idea behind the long inlet tract, starting at the front of the bike just beneath front right hand side, of the fuel tank, was to add [[horsepower]]. The [[air filter]] and choke let air into that long, curved pipe, and that long induction system actually boosted performance. | ||
BMW had been making airplane engines throughout the war (a lot of them based on Pratt and Whitney double-wasp radials, built under license, and BMW did what Opel did during the war; paid their license fees regularly to the American companies entitled to the license fee per unit), so BMW knew about extracting power by tuning induction tracts. There was even an experimental single cylinder-engined bike made by BMW using the cylinder and cylinder head from a Pratt and Whitney double-wasp radial. That bike had churned out even more power! | BMW had been making airplane engines throughout the war (a lot of them based on Pratt and Whitney double-wasp radials, built under license, and BMW did what Opel did during the war; paid their license fees regularly to the American companies entitled to the license fee per unit), so BMW knew about extracting power by tuning induction tracts. There was even an experimental single cylinder-engined bike made by BMW using the cylinder and cylinder head from a Pratt and Whitney double-wasp radial. That bike had churned out even more power! | ||