Planning for my Warlock - Basic LA 408 Stroker

[bennydodge]

Back in the 2000-2005 time frame I saw postings of at least seven 408 cast cranks breaking... But since then I haven't heard of any more...
Was there a casting flaw? Was it an assembly error? As Steve mentioned the cast crank uses radiused fillets, if the builder used a standard radius bearing it could overload the crank... (assuming the crank would even rotate)
I guess I just prefer to trust a forging in spite of the casting likely being fine for the application...

Interesting for sure. I built my engine around 2003-ish and it does have the rolled or radiused style. For the record, once you get up high in the 500 horse range it's wise to go forged..

[bennydodge]

By the way, those Warlock's are damn cool rigs. Got any pics?

[autoxcuda]

Wasn't there an issue with one of the cast cranks breaking a few years ago? Maybe they were Eagle brand?

That what I remember...  I thought it was whoever makes the Mopar cranks...

Eagle

...and

Eagle

The Scat cranks are a different story.

Also, save some $$$ and buy a Scat balanced kit. They are internally balanced so they take a regular 340 balancer. They come with Kings bearings for the radius.

I bought mine from Brian at IMM Engines. He said he's checked the balanced and they are fine.

I've talked to Scat at SEMA and they balance in house at their Redondo Beach facility.

I got the I-beam rods and didn't have to notch the block. With the lighter aftermarket pistons and rods it revs surprisingly very quickly.

[1 Wild R/T]

Wasn't there an issue with one of the cast cranks breaking a few years ago? Maybe they were Eagle brand?

That what I remember...  I thought it was whoever makes the Mopar cranks...

Eagle

...and

Eagle

The Scat cranks are a different story.

Also, same some $$$ and buy a Scat balanced kit. They are internally balanced so they take a regular 340 balancer. They come with Kings bearings for the radius.

I bought mine from Brian at IMM Engines. He said he's checked the balanced and they are fine.

I've talked to Scat at SEMA and they balance in house at their Redondo Beach facility.

I got the I-beam rods and didn't have to notch the block. With the lighter aftermarket pistons and rods it revs surprisingly very quickly.

Good Info, thanks for the input Steve..

[autoxcuda]

If he's going from a 360 to a 408 internal balance he'll need:

New/different balancer

Spacer or something for crank pulley

Remove torque converter weights

Anything else? 

[bennydodge]

When I went from a 340 to a 416 my cast crank setup was internally balanced and I was able to use my stock crank pulley (73 340). I think it was a BHJ neutral balance dampener. I also swapped my converter to a zero balance PTC unit. On my buddy's stroker we just chiseled the weights off a stock converter and that worked also.

[gzig5]

If he's going from a 360 to a 408 internal balance he'll need:

New/different balancer

Spacer or something for crank pulley

Remove torque converter weights

Anything else?

New tires to take the abuse that is about to be dished out.

[Chryco Psycho]

Intake is good
I would use 308 swirl heads from 87-92 360s as my first choice
I would use magnum exhaust manfolds , there are better & worse years so do the research .
I would definately use a forged crank stroker

[autoxcuda]

Intake is good
I would use 308 swirl heads from 87-92 360s as my first choice
I would use magnum exhaust manfolds , there are better & worse years so do the research .
I would definately use a forged crank stroker

What are the cc's of the 308's? If they aren't the same as aftermarket heads, he'll have to change pistons and rebalance for any other head changes.

[Chryco Psycho]

I will have to look up the head CC , they are the same as any LA head but are good for about a 40 hp gain over X or J castings