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Old 07-11-2011 | 04:28 PM
  #31  
123Cat
 
Joined: Oct 2005
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From: ACTAustralia, AUSTRALIA
Default RE: Silver Swallow Pulldown

Saw an article comparing a Nascar engine to a F1 engine in 2006 the Cup eng does 10,000 RPM the F1 engine does 19,000 RPM, the rod to stroke ratio is 1.9/ 2.56 respectively

2.56 is a long rod

a 2.56 rod in a 2 stroke would mean you have to lift your cyl up about 9mm say in my 09, that would mean a lot more crankcase volume , is that a good thing in a small diesel ?

By the way the cup engine had a rod from a steel called 300M ( Modified 4340 , vacuum melted ), and the F1 engine had high grade titanium , I think its about 40% the weight of steel

Anyway I dont feel like running a short conrod anymore after looking at all the latest in models and high revving car engines , they all have long conrods ,

To space the cyl upwards on my silver swallow is hardish , but I may give it a try ,

and also the cylinder is not located very well in respect of the bottom end so that is another thing ,

I could check to see if it is square with the crank axis






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