4.125 Stroker crank
TECH Enthusiast
Joined: Mar 2009
Posts: 680
Likes: 7
From: Clearwater
yes but the cost and impracticality alone is enough to keep people away unless you have more money than you knew what to do with. it might only last a few track passes. you will also be severely limmited on head/intake choice unless you want to convert some SB2.2 heads. if you want a 427 it would be a lot cheaper to just buy a LS7 or a gen 1 big block.
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Brett Foote There is a reason it has not be done before in the 17 years or so we have had LT1s. It is physically impossible with the factory block.
The biggest i have seen ran is a 4.00 crank, It was a 410. Even with the 4.00 crank i would not run over a 5.7 rod and you have to grind the rod bolts. But you can do the 3.875 with a .060 and get 401ci ( I think) with no problems i would think
TECH Apprentice
Joined: Dec 2008
Posts: 372
Likes: 1
From: Kinston North Carolina
You might could run a 2" rod journal which would help very little but every little bit counts. The number one thing thats limiting you from that stroke is deck height. You cant stuff that long of a stroke in a 9" deck and have a feasable rod or compression height combination. I wouldnt recommend running that kind of stroke with a 5.7 or 5.85 rod and with a 6" rod that would put u less than 1" of compression height on the piston. Its already tough gettin a 4 inch arm in these blocks, and with the Cyl heads available for these engines the extra stroke isnt gonna get you the gains expected.
