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Re: 440-3.665 stroke?
[Re: dragduster71]
#1664408
08/28/14 12:21 AM
08/28/14 12:21 AM
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Joined: Mar 2006
Posts: 9,844
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,844
MI, usa
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Quote:
i got an engine in a trade was told/ it was a 496/440.well the pistons are std stroke srps.it came with a forged crank.on box it said 4.125 stroke.std rods,20 under mains.the rod journals are chevy 2.2 they match the rods grp 6.800 5100 series.on the crank it says std rod/20 mains,well machine shop told me they measured 3.665 stroke on the crank didnt make sense to him he mesured handful of times still 3.665.he was confused as was i.then he told me with the 55 overbore it comes out to 440.im very confused what should i do?i cant find any info about this online.is he measuring wrong?hes been building bad ass race engines for 30 years.its lawrence machine hanford ca.
Where did a 3.66" stroke crank come from? A stocker is 3.75"
Doug
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Re: 440-3.665 stroke?
[Re: mike s]
#1664411
08/28/14 04:09 PM
08/28/14 04:09 PM
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Joined: Jan 2003
Posts: 9,875
Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,875
Weddington, N.C.
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Thinking about it, he probably destroked-offset ground it to 3.665 to take advantage of an off the shelf BBC rod/.990 pin piston combo....probably because it was significantly cheaper and lighter than a conventional 440 mopar piston/rod combo for nearly the same cubes  Now just reverse engineer it to figure out what rod and compression height slug combo he had in mind....
Last edited by Streetwize; 08/28/14 04:11 PM.
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I' trying to rememer the exact storke that the old Pro Stock 366 C.I. Hemi motors used 
