Re: [Chrysler300] 300 F: from 413 to 426

["Don Verity" <d.verity@xxxxxxx>]

A stock 413 bore is 4.1875, not 4.18. That makes a 426 exactly .0625 over, not .070. A .010 over 426 piston might work if they were available. As mentioned before, I would be careful about going that big without sonic testing. You could also sleeve the block back to stock specs, if money is no object.
300ly,
Don
  ----- Original Message ----- 
  From: Keith Boonstra 
  To: charlies@xxxxxxxxxxxx 
  Cc: antonino.jelitro@xxxxxxxxxxxxx ; Chrysler300@xxxxxxxxxxxxxxx 
  Sent: Monday, April 04, 2011 2:39 PM
  Subject: Re: [Chrysler300] 300 F: from 413 to 426


    
  A stock 413 is 4.18 bore and a 426 is 4.25 bore. So how about punching 
  it 70 over. Then you'd be right on spec for the stock 426 pistons. And 
  the 10 thou cleanup over your current 60 might be just be just what it 
  needs without much more risk.

  Like Charlie says, check the block out first. But you might have a very 
  good plan.

  Keith Boonstra

  On 4/4/2011 11:56 AM, charlies@xxxxxxxxxxxx wrote:
  >
  > Antonello,
  > I would think that a .060 overbore is at the limit for this block. If 
  > you need to go larger you might be asking for trouble. Eighty over 
  > pistons may be hard to locate also. For sure I would have the block 
  > sonic checked, then if it passes, have the block magnefluxed. If it 
  > were me, I’d be looking for another block. Charlie in Ottawa
  >
  > On Apr 4, 2011, Antonello Jelitro <antonino.jelitro@xxxxxxxxxxxxx 
  > <mailto:antonino.jelitro%40fastwebnet.it>> wrote:
  >
  > Hello
  > I have finally received the engine for my F, it's a 413 that has 
  > already been overbored 0.60. There is some ridge at top of the 
  > cylinder walls so would need an overbore. I would purchase pistons for 
  > a standard bore 426, is this a safe thing? Has the 413 safely been 
  > overbored to 426 specs? Any problems of overheating or oil 
  > consumption? I would fit a set of heads from a 300 J with large valves.
  > ANy suggestion would be greatly appreciated. Thank you Antonello
  >
  > [Non-text portions of this message have been removed]
  >
  > 

  [Non-text portions of this message have been removed]



  

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