Bought a 406 block ready to go, need to get a rotating assembly. Love to get a forged internal balanced but at $600 is kinda hard to swallow. This is gonna have a whipple supercharger hanging off it, and guessing will be around 5-550 horse, and 650# of torque. This is going a truck, not a car, so no 6500 rpm launch’s or runs. I can a new stock crank for around $200, but not sure just how strong they are. Cast or steel?
CK5
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400 cast crank
- Thread starter b454rat
- Start date
Forgot to mention this going ina 96 Yukon, vortec ramjet intake, 411 LS ECM and with a 4l80, not that that makes a difference. S/C puts out roughly 10lbs boost.
When I was looking at them for BB recently I read that the scat or eagle cast cranks are good up to around 600hp. For the extra few hundred I wouldn't push it. I'd buy the forged and not worry about maybe ruining that engine. If the crank DOES come apart, it probably won't be as simple as just replacing it.
What I’d like to do, just hard to swallow $600 for steel when a cast is $200. But like you said wont have to worry bout it with steel. I’ll keep an eye out for a good used one, or pick up cans on the side of the road to get one...
When you figure in the rest of the cost of the engine or components, that extra $400 isn't that bad.
That was the thinking I had at least. With the BBC it was $700 vs $300. So same price difference.
The cast may just hold up forever too..... It's the "What if it doesn't?" That made me think
That was the thinking I had at least. With the BBC it was $700 vs $300. So same price difference.
The cast may just hold up forever too..... It's the "What if it doesn't?" That made me think
You already know the right answer...
With the extra load on the snout from the supercharger and the increased chances of detonation of boost and high loads from a heavy truck , I would be running a forged steel crank , good rods , and forged pistons .
I agree with that,why risk the whole engine over a cast crank--but I've never seen or heard of a stock 400 SB crank breaking,that doesn't mean one wont though...usually a rod fails first and takes out the block,either way the engine will be junk if either fails..
The 1 thing I learned years ago,
Build it right....
Build it once.....
I have built MANY engines...
And yes, I learned because some failed......
Currently building a 572....
I would save up, and get the better crank.
Or build a BB, and you won’t need the supercharger to make power!
Build it right....
Build it once.....
I have built MANY engines...
And yes, I learned because some failed......
Currently building a 572....
I would save up, and get the better crank.
Or build a BB, and you won’t need the supercharger to make power!
Well if I didn’t already have the s/c I would. At 1 point I had a complete donor, dash, column, ecm, wiring, vortec 454 and nv4500. But bought whole truck for what the whipple is worth. Even win a stock 350 it makes more horse/torque than a vortec 454. But will have forged pistons with good 5.7 rods...
So where is the best place to get one? Summit has em for $600, Comp Products seems to be the same...
Either is a fine place. I’m a jegs kinda guy.
Bought a lot thru summit as well, zero issues. Hardly ever thru jeg's dunno why. Maybe cause there is no difference in products or price, and just always went thru summit. Didn't know if someone knew of a little secret source they were willing to share lol....
If you hold an NHRA license, jegs gives you a racers discount.
The only problem i have with Jeg's is there location, can't get one day service.
Competitionproducts.com. Local engine builder uses em, prices seem to be comparable with everyone else....
I've used them a few times. decent prices on Stroker engine kits.
