460 Crankshaft
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
Likes: 2
From: CT
No the 4.125, 4.250 and 4.375 are aftermarket cranks and use 6.7 BBC rods. The 428 3.98 crank is the largest of the stock strokes that uses FE short rods. On the aftermarket cranks Scat makes a 3.98 std 428, a 4.125 and a 4.250. Then there are some new forged cranks in both 4.250 and 4.375.
Postmaster
Joined: Nov 2002
Posts: 3,447
Likes: 1
From: Littleton, CO
Originally Posted by havoxx33
Hey FFR, those strokes are using the original crank, right? I'm throwing a 428 in, would those still work or would they be too long? Thanks again
Just wondering, --Mike
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Freshman User
Joined: May 2004
Posts: 28
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Bare with me fellas, this is my first engine build, still learning the ropes. I knew the stroke for the 428 was 3.98 that's why when FFR noted the 4.125, 4.250 and 4.375 I didn't know he was referencing different cranks, I thought he was talking about different rod lengths. Like I said, still 'green' Thanks for the patience and insight
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FE "Freakin Expensive"
Joined: Dec 2003
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From: Smith Mountain Lake, VA
Originally Posted by havoxx33
Nah, I need all the info I can get. BTW, if I go with the 4.250 stroke, how much (if any) do you think I'll need to grind of the inside of the block to make those rods work?
Also to make sure you dont get into to long of rod, that it puts the piston height , so far down that the wrist pin ends up in the Oil ring land...Bottom ring.. But this only generally occurs when going with a long arm crank..but has happened with some of the shorter Stroker cranks also...
Depending on the all the variables.....Just some food for thought!!
RJ
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