|
The problem with the 2.4-2.7 crank IS the width of the rod. The cross-section of the throws had to be thinner to accomodate.... as a result you get a flexy crank.
This intrigued me as I hadn't ever heard this thought. All I've come across is that the journals have less overlap with the mains, the pesky 'Vend' diagram. So with my trusty digital calipers I measured two cranks webs. A 2.4 counterweighted and a 2.0 non counterweighted from a 914-6. Average for the 2.0 was 7mm thickness and 6.0 for the 2.4. The forged 2.4 was much tighter with 5.90 the thinnest and 6.2 the thickest. The 2.0 was 8.05 vs 6.55.
|