Originally Posted by russxr67
I have been noticing the price of aftermarket steel cranks(4340) have dropped significantly lately.From memory either A1 or Performance unlimited had a standard stroke 4340 eagle crank for sale for under 800 bills. If the standard piece makes you nervous then consider this option.Sell you aussie crank.You should pick up 300 bucks for this alone i reckon.I sold a set of 351Aussie crank and rods in the quokka a couple of weeks ago for 350.Crank was 10/10.Assuming the crank needs grinding ,nitriding etc to make it live at high rpm then it will probably cost a bunch of money anyhow,and the sale of your crank will defer the cost.If you work it correctly i,d say you may have to come up with a couple of hundred bucks.From memory it may have been A1.give them a call.cheers, russ.
As usual, Russ is right again. By the time you prep your stocker crank, you are nearly into it as much as a new forged part. I recently tried to save a few bucks on a hotted up engine that would see mostly street duty with some trips to the track. This is what it cost (US) to recondition the crankshaft:
$ 65 used std/std 4MA crank (including shipping to me)
$125 straighten and grind -.010/-.010
$ 40 chamfer oil holes and micropolish journals
$155 nitride treament
Plus the time and gas for hauling it around and picking it up at the crank shop 60mi away from me!
A new Eagle crank is $499 plus shipping and I could have gotten it in any stroke from 3.50, 3.75, 3.85 and 4.00 for the same price. How much better is it to have a stocker now?
Since I had to buy pistons and rods for this engine, I would have been power ahead to buy a stroker crank for the extra $100 and saved my time and effort in getting the used crank reconditioned.
I would never even had considered a stock crank for a serious performance engine, especially one that needs to go to 8,000 RPM. These need to be internally balanced for that kind of revving. Also, you need proper oiling system mods or an oil pan the size of Saudi Arabia.
I also reconditioned a set of used D0AE rods for about $225 US. This represents about $250-300 less than a set of H-beams, but also a much less strong part.