Technical > Matt Shaff's Engine Shop
Engine is stiff, hard to turn over???
dreracecar:
--- Quote from: JrFuel Hayden on June 21, 2017, 09:21:49 AM ---Is that an OEM crank ?
Jon
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Eagle
GlennLever:
--- Quote from: dreracecar on June 21, 2017, 08:04:21 AM ---And it did not break clean thru??
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Yes, I had the rear cap off when I rotated the engine and the back piece fell out of the engine.
New crank is ordered, new rods are coming from Venolia
THE FRENCHTOWN FLYER:
FWIW it looks as though the crack started at about the 10 O'clock position on the last photo. Maybe use a smaller journal lightening hole. And nitride. And more generous cheek radii.
GlennLever:
--- Quote from: THE FRENCHTOWN FLYER on June 21, 2017, 12:32:37 PM ---FWIW it looks as though the crack started at about the 10 O'clock position on the last photo. Maybe use a smaller journal lightening hole. And nitride. And more generous cheek radii.
--- End quote ---
Crank was supposed to be good for 1,500 hp.
No lightening holes on the new crank.
coupemerc:
Do yourself a favor and go through the whole motor and check EVERYTHING! Breaking a crank is about as bad as it gets. Check the main webs in the block for cracks and check the main line too. Good luck
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