Technical 392 Hemi Crankshaft

I’ve been cruising these forums for a while now, just got set up with an account today. Tons of great info! So my question, I have the option to buy a early 392 Hemi. The feller that has it has multiple sets of everything, rockers, heads, rods, pistons, multiple intakes... and on and on. The issue is there’s one really clean block, and no crankshaft. I’m having a hard time finding anyone who builds a crankshaft for them. I was on hot heads site, and didn’t see any options for new crankshaft. I’d like to know what kind of coin it’ll cost before we strike a deal. So I’m in the market for a new, or good used. Any help is greatly appreciated! Wanting to build this motor to put in my 55F100.
Thanks!

 

Unless your building a fuel dragster, a stock crankshaft is the only way. Try Quality engineered components, a Hemi specialists who goes by 73rr here on the hamb. He shows four available on his web page under inventory clearance.

 

Thanks for the info! Is a new crank that much more than he’s asking for his used ones? Is there a source out there for new?

 

Sonny Bryant makes new billet cranks for early Chryslers...around $4K last time I checked. Hot Heads has a classified section on their web site. Many vendors and it's free to buy or sell.

 

The only non original cranks I know of are new billet race items. Originals are going for a grand.

 

Make sure ya mic it....

 

Hit it with a hammer, see if it rings pretty.....

 

Don't hit it on the journal, though!

 

Crower but they do cost

 

Scat also does billet cranks. A friend of mine had a stroker crank made so that the increase in the bore and stroke, brought the displacement to 426 cu in.
As reported above, bring money.
https://www.scatcrankshafts.com/

Bob

 

Thanks for the input guys. This was the right place to get the info I needed. Do y’all trust buying a used one online? Obviously they’re bringing around a grand, but that’s a lot of coin riding the line if it arrives unusable.

 

They are out there. Someone will likely pipe up here. The crank in my 354 came from the HAMB.

They are steel, durable and repairable. Since I got mine, I have acquired two more 354 cranks, for my other blocks. Both had spun rod journals, one each.

Welded up: $65 per journal. Chamfered, polished, whole thing: $125. From wrecked to STD/STD, for $190, plus tax.

Many metro areas still have a crankshaft shop.

 

Oh, and buy everything that you can get a good deal on. Then you can turn around and sell off the extra parts to fund the project.

If this comes with a set of adjustable rockers, you can sell those for $1200, and use the money to buy a decent crank, a new set of adjustable pushrods, and some non-adjustable rockers. You will likely break even.

 

If your search finds a used crank, and the rear flange bolts are threaded, best to skip it, chances are that was a race crank and subjected to some abuse during its lifetime, and run the risk of it being cracked or soon to be cracked

 

By its self, it just means it was tapped for a flexplate for a modern 727.

 

This is probably the best advise you're gonna get regarding shopping for a second hand 392 crankshaft. The trick is finding one that's not cracked.

 

Yes it could, and why I said chance. Beboppin around the swaps or internet, one does not have the equipment to check it out and sellers sometimes don't tell the truth or give you your money back on a bad part and not saying that an un-threaded crank is without problems either, just that I like the increased odds in my favor of a pure stock crank

 

Yea it’s hard to check things out when purchasing from out of state. Especially taking a person at their word. Thank you for the advise!

 

Cranks are expensive, and the only time a racer will change it is when they have to. I had a guy tell me once that the crank came from Garlits and that he had run his first 5 seconds with it

 

Will a 392 crank fit in a 331 and make it a stroker? And are pistons available? I am a bit new to Hemi's.

 

If a person wants to badly enough. a Pontiac crank can be made fit. Many stroke options. But again. not really cheap. On the other hand I volunteered to buy a Winburg top fuel crank for Flashpoint. They go very high.

 

Kinda. You'd have to do a ton of lathe work, to turn it down to get it in there. It can, and has been done; however, with that much metal going away, you are likely looking at having it balanced with several slugs of uber-expensive Mallory Metal.

If you have a 331, and are missing a crank, get a 354 one. If you find a 392 one, the guy at the top of this thread needs one.

 

That's what the guy was saying about using a hammer. If it rings it's good, if it thunks it's not.

 

I like your use of the term "volunteered". It implies some sort of sacrifice, in this case cold hard cash. I understand completely.

 

Good thread.