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Cast 440 crank durability

  
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Cast 440 crank durability

 
Rednuck Rednuck
New User | Posts: 26 | Joined: 07/12
Posted: 03/28/13
08:28 AM

I've been having problems finding a forged crank that doesn't come with 28' of motorhome but need to start putting together the engine in my mud truck. Currently I have an engine out of a '77 Royal Monaco. I am trying to build for exactly 500hp (+/- 25). Will the cast crank stand up to this or should I keep trying to find one and not risk it?  

IQ52 IQ52
Guru | Posts: 853 | Joined: 06/10
Posted: 03/29/13
07:39 PM

I'm sure some people are using the cast crank successfully to 500 HP. The factory put the cast cranks in engines designed to make 250 HP. We used a cast crank in a Chevy 454 engine that is probably around 450 HP. It is working fine. Question is, "Do YOU want to risk it?"  

drmopar drmopar
Guru | Posts: 1445 | Joined: 02/08
Posted: 03/29/13
10:39 PM

IQ is right, it will work but why chance it, the cast crank you have is over 35 yrs. old. By the time you machine it you could well be on your way to buying a new forged unit..  

Rednuck Rednuck
New User | Posts: 26 | Joined: 07/12
Posted: 04/15/13
11:04 AM

Are there any specific brands I should stay away from? I plan on having the machine shop look over whatever I buy when they balance it. I was thinking an Eagle crank just because with shipping it will probably be the same price as the 440 source one when it gets to me.  

IQ52 IQ52
Guru | Posts: 853 | Joined: 06/10
Posted: 04/16/13
05:54 AM

I have found no difference in quality between 440 Source and Eagle. Anything you buy will need to be verified correct, even if it is forged and machined in the good ol' USA.  

Budnicks Budnicks
Guru | Posts: 1497 | Joined: 08/10
Posted: 04/17/13
02:16 PM

IQ52 your a great help...  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

Budnicks Budnicks
Guru | Posts: 1497 | Joined: 08/10
Posted: 04/17/13
02:18 PM

Mopar Performance sells a forged crank also, they ain't cheap thou, Ohio Crankshaft is a decent source too...  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

Budnicks Budnicks
Guru | Posts: 1497 | Joined: 08/10
Posted: 04/17/13
02:23 PM

Mancini Racing sell Eagle 3.75" stroke forged 4340 crankshaft, cross drilled, chamfered, x-rayed, magnafluxed/sonic tested, stress relieved, radiused & shoot peened, for $695.00  
"Fill Your Library Before You Fill Your Garage" Good Luck  "Budnicks"

Rednuck Rednuck
New User | Posts: 26 | Joined: 07/12
Posted: 04/18/13
02:55 PM

I ended up ordering one through a local company a 3.75" 8 bolt crank. A bit more then mancini racing but that's what I get for being Canadian. Just need to order a cam and I'll be set.  

Rednuck Rednuck
New User | Posts: 26 | Joined: 07/12
Posted: 04/25/13
02:32 PM

IQ52 - For 500-550 horsepower, if you do all the assembly, your looking at $6,000-$8,500. Offset ground crank 3.90 stroke, h-beam rods, forged pistons, Edelbrock RPM 84cc heads, Edelbrock RPM Performer intake, hydraulic flat tappet cam 240/240 @ .050 .525/.525 lift, 750 cfm carb, roller rocker arms, good pushrods, after market ignition and distributor, headers. That's a good generic start.  

This is from someone else's thread that I didn't highjack, I just wanted to ask what you thought of a similar build with some changes.

440 with new eagle crank
H beams
dished forged pistons
edelbrock victors untouched
an old torker intake
cam Comp XS274S 236/242 .502/.511
1.5 Hughes rockers

I want right at 500 so I figured I needed to go with a bit smaller of a cam because of the better heads. cam is the only thing I haven't purchased. I got the victors dirt cheap and have an eye to more power in the future so that's why I went that route.

The base build was going to be based on This carcraft article with less cam but went a bit off track when I got victorsw/valves for $500 each.  

IQ52 IQ52
Guru | Posts: 853 | Joined: 06/10
Posted: 04/25/13
04:46 PM

OOTB, to .500" lift, the RPM head is probably better than or equal to the Victor (I have flow tests that show that) so you haven't gained an advantage there. The OOTB Victor head doesn't really have an advantage over the RPM until you get over .500" lift. Opt for a bigger cam if you want the advantage the Victors bring to the table. For the future, the Victor is an excellent choice and the price was a killer deal.

You're still going to have a strong engine with what you have listed.