Its the weekend and 440 source is closed. Does anyone know off hand if they have stopped producing there Ultra lightweight cranks. When I go to the website it says no item found. Thanks everybody.

Lest we forget !!

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looks like they have them for 4.25" stroke.

http://store.440source.com/4250-Stroke-Crankshafts/products/42/

If they don't have a lightweight version listed, call them. The crank supplier lists the lightweight cranks for both low and high deck engines in different stroke lengths.

I've run one in my RB with their 7.1 inch rods, and like how the motor rev's with such smoothness and ease. My pistons only weigh 524 grams, which I'm hoping will help ease the strain on the main caps etc.I forget what the total bob weight is though. I've had it apart once due to a valve train harmonic issues, and there was no sign of cap walk at that point. The block does have main studs and a Hughes girdle.

Last 505" stroker using 440 block, Source 4.25" lightweight stroker crank, 7.1" H-Beam rods, and the 27cc dish pistons (TF240 heads, mild pump gas build.)
The average piston weight was 591.2 grams, pins 141.1 grams, rods (overall) 814.7 grams, rod small ends 252.0 grams, rod big ends 562.7, Total bob weight came out to 2271.24 grams.

I used an Eagle 4.25 crank and Eagle 7.1 rods with IC842-.055 piston from 440 Source. Piston/603.5 rods/ big end/607 small/236.8 pin/141. Bob weight 2368.8. Just some info for you.

They were out of stock for a little while, but we got them back in last week, so they are back up on the web store and available for purchase again.