Gear driven Cam
07-11-2013, 05:38 PM
#31
Drifting
...and as long as the maker is not BMW 
Although to be fair the biggest problem is probably that they decided to put the chain at the back of the engine. Not a bad reflection on timing chains generally.
Although to be fair the biggest problem is probably that they decided to put the chain at the back of the engine. Not a bad reflection on timing chains generally.
07-11-2013, 06:39 PM
#32
Three Wheelin'
That’s a Gallardo engine. Designed and engineered by “our cousins” at Audi ... nothing to sneeze about.
The advantage of having the cam drive at the back (near the flywheel) is having a smooth drive unaffected by the torsional twist of the crankshaft under load. Obviously serviceability is not its strong point.
I like the layout of my Espada (V12 with DOHC for each bank). A small gearwheel on the crank engages a larger wheel (2:1 ratio, one per bank) which also has a sprocket attached, which drives the two cams via a chain (one chain per bank). That way the diameter of the cam sprockets can be kept small (good space utilization) and the chains short (no need for chain guides).
Laust
The advantage of having the cam drive at the back (near the flywheel) is having a smooth drive unaffected by the torsional twist of the crankshaft under load. Obviously serviceability is not its strong point.
I like the layout of my Espada (V12 with DOHC for each bank). A small gearwheel on the crank engages a larger wheel (2:1 ratio, one per bank) which also has a sprocket attached, which drives the two cams via a chain (one chain per bank). That way the diameter of the cam sprockets can be kept small (good space utilization) and the chains short (no need for chain guides).
Laust
