Whats the latest news with 5.7 strokers??

cu440da said

It's been a while since I've read up on stroker kits. In the early retro swap days it seems like the 400-410 ci range was the max for stock blocks, and the 440 ci kits were aluminum block territory. Has anything changed? I've seen some more talk of the 440's running around but no mention of alum blocks. Did the BGE block change the game?

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I was following this topic a number of years back and don't remember everything but I can provide a few of the (facts?) that I got from reputable shops at that time.
The 6.1 block was the strongest back then and they're were a few shops putting a 4.25 crank in it. Depending on the bore, you'd then get a 426 or as much as 440. The 4.25 crank was pretty hard on iron blocks. When the aluminum blocks came along, they would last longer with that crank, but it was still excessive thrust on the side walls.

I talked to Arrow Racing who built the aluminum 426 for Mopar Performance, using a 4.0 crank with 4.125 bore (I'm pretty sure, but double check on this). I think a real nice engine would be a stock bore 6.1 (4.055 bore) with the 4.0 crank, or possibly 4.05 crank) If using boost, the 4.0 x 4.055 will give you a nice engine with room to bore again later for a rebuild.

The differences in opinions (even from the top builders) made me go more conservative on my 6.1 stroker build (naturally aspirated) with a 3.795 crank and a 4.060 bore, built by BES Racing.

That engine is still new and I'm going to sell it because I bought a new Hellcat crate engine. Tony at BES said that stroker is good for a good 600 hp.