Why would you do this? Grey cranks are driblet forged and are thence a rattling strong too ridged crank, they take a large lump on the crank to assistance rest. Grey motors suffer from harmonics at 6200RPM the claim by many of the quondam schoolhouse racers is rest to a higher place or below it, Those amongst big HP can push by speedily in addition to are less probable to pause a crank.
The Vaxhull crank is a softer crank with these every bit explained inwards this conversation amongst Phillip Barrow:
"Horrible things they are! Stroke also short crank likewise soft. Every time yous rev them they change the piston fazing. Also really high maintenance." says Phil
"Are you pulling my leg, everybody says how good they are!" I asked
"Oh really truthful. Also very hard to notice. I've ever done my ain. I do it differently than the large dollar conversions I've seen. A lot of operate merely to hit a trivial reliability alongside the catch of high maintenance. They are softer & accept larger journals than a grayness. They besides a amend counter weight positioning . Being softer when it flexes it doesn't normally scissure different a greyness crank. But you lot tin can entirely flex then many times until fatigue takes over & it will brake in No6 big stop radius just similar a grayness that makes any assort of ability."
What are we chasing together with how do yous topographic point i:
"1958 to 1961 Pa Vauxhall Cresta 2.2 liter non the 2.vi . The easy style to bank check the two.ii has the dizy in the same place every bit a grey & the two.half-dozen has it similar a cerise ( Holden ) engine"
So whats the biggest rev yous take seen on your Phil? And whats the summit speed you take seen.
"Ok the highest it has revved is 8300 alongside the twin 45mm webers. Now do your Maths fifteen" 60series tyres 3.nine:i diff 1:i height gear & 8300rpm on conrod just earlier the chase!"
Check the video of Phils FJ screaming. Who says a grey can't rev!
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