Crank and rods for 1000hp?

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Crank and rods for 1000hp?

Post  fastashley on Fri Nov 04, 2016 10:20 am

Building a 598 this winter
NA, A460 heads, 7000 rpm max
What would you recommend for crank and rods?
Is the forged Lunati stuff good enough, or is it time to step up to Callies, Oliver, etc?

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Re: Crank and rods for 1000hp?

Post  IDT-572 on Fri Nov 04, 2016 11:08 am

I use the Lunati cranks in engines in that hp range. With Eagle rods and a 2000 bolt upgrade.

Oliver or Callies would be a good insurance policy , but I have had good luck running the above.
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Re: Crank and rods for 1000hp?

Post  dfree383 on Fri Nov 04, 2016 1:23 pm

Callies stuff is nice for the money
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Re: Crank and rods for 1000hp?

Post  IDT-572 on Fri Nov 04, 2016 1:28 pm

dfree383 wrote:Callies stuff is nice for the money

What he said Wink
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Re rods

Post  HorsinAround on Fri Nov 04, 2016 1:31 pm

Eagle offers a 4340 H beam and a 4340 I beam. Is one better then the other?
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Re: Crank and rods for 1000hp?

Post  IDT-572 on Fri Nov 04, 2016 2:06 pm

HorsinAround wrote:Eagle offers a 4340 H beam and a 4340 I beam. Is one better then the other?

That's a question that is asked a lot.

Short of taking two rods of the same weight and length and material putting both ends on two centers in a press and loading them and see which one deflects the most.

But then there's compression and tension loading parameter's also to test.

I kind of lean towards the I beam being the stronger of the two.

Most all buildings and bridges and also big trailers are I beam.

So LOL I have no idea, sorry I am no more help. Neutral

My gut feeling is for the same weight the I beam is the ticket.
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Re: Crank and rods for 1000hp?

Post  Lem Evans on Fri Nov 04, 2016 4:39 pm

The Eagle I beam is a lesser rod than their H beam.

An Oliver/Callies/Crower I beam could be a different matter.

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Re: Crank and rods for 1000hp?

Post  dfree383 on Fri Nov 04, 2016 6:35 pm

Lem Evans wrote:The Eagle I beam is a lesser rod than their H beam.

An Oliver/Callies/Crower I beam could be a different matter.

X2 and the latter ones have substantially better metal, machining, design and bolts, but are expensive.
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Re: Crank and rods for 1000hp?

Post  fastashley on Fri Nov 04, 2016 6:45 pm

I agree an I-beam billet rod is stronger. All my best SBF stuff is lightweight billet I-beam.
Just wondered if it was necessary with a 598 BBF

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Re: Crank and rods for 1000hp?

Post  JBR-3 on Fri Nov 04, 2016 7:49 pm

I've never seen an I-beam titanium rod (doesn't mean they don't exist!)

Not sure if the reason would be an ultimate strength arguement or a machining issue.

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Re: Crank and rods for 1000hp?

Post  David Cole on Fri Nov 04, 2016 9:07 pm

I've got a Scat crank and Scat H-beams w ARP 2000 bolts in my A head 598. The crank has some custom work by Adney Brown at Performance crankshaft. Cut the diameter of counterweights and knife edged. It also was converted to a shorter Boss 9 style crank snout. It has held up well and is above 1K hp.

I had a very similar 588 that was a good engine as well. Same deal as above except it didn't have the Boss 9 snout.
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Re: Crank and rods for 1000hp?

Post  Lem Evans on Fri Nov 04, 2016 11:31 pm

David Cole wrote:I've got a Scat crank and Scat H-beams w ARP 2000 bolts in my A head 598.  The crank has some custom work by Adney Brown at Performance crankshaft.  Cut the diameter of counterweights and knife edged.  It also was converted to a shorter Boss 9 style crank snout.  It has held up well and is above 1K hp.  

I had a very similar 588 that was a good engine as well.  Same deal as above except it didn't have the Boss 9 snout.

It's been a lot of years but, the A460 block and the crankshaft are still alive. The pistons and rods were replaced as needed. A 598" last time I heard.

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Re: Crank and rods for 1000hp?

Post  Mark O'Neal on Sat Nov 05, 2016 2:12 am

If you want to run the BOSS 429 snout, Scat has them off the shelf in 4.300 and 4.500 stroke.

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Re: Crank and rods for 1000hp?

Post  fastashley on Sat Nov 05, 2016 6:18 am

Is there an advantage to the Boss 9 snout?

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Re: Crank and rods for 1000hp?

Post  David Cole on Sat Nov 05, 2016 8:08 am

fastashley wrote:Is there an advantage to the Boss 9 snout?

It's shorter. The weight of the damper is closer in to the block, so less stress on the crank and #1 main. It's std on the Callie's crank. At the time I bought mine the Callie's was not available yet and Scat didn't have it either unless you had them make you a custom crank. It does take a different damper. ATI and Innovators West make them for the application. I have an ATI. It's essentially a SBF inner hub with a BBF outer shell so the timing marks are in the right place.
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Re: Crank and rods for 1000hp?

Post  David Cole on Sat Nov 05, 2016 8:10 am

Lem Evans wrote:
David Cole wrote:I've got a Scat crank and Scat H-beams w ARP 2000 bolts in my A head 598.  The crank has some custom work by Adney Brown at Performance crankshaft.  Cut the diameter of counterweights and knife edged.  It also was converted to a shorter Boss 9 style crank snout.  It has held up well and is above 1K hp.  

I had a very similar 588 that was a good engine as well.  Same deal as above except it didn't have the Boss 9 snout.

It's been a lot of years  but, the A460 block and the crankshaft are still alive. The pistons and rods were replaced as needed. A 598" last time I heard.

That was a good un. James won the Jeg's Super Quick championship with it I was told.
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Re: Crank and rods for 1000hp?

Post  rmcomprandy on Sat Nov 05, 2016 10:11 am

JBR-3 wrote:I've never seen an I-beam titanium rod (doesn't mean they don't exist!)
.

I was handling at a set of Crower Titanium I-Beam rods yesterday.

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Re: Crank and rods for 1000hp?

Post  fastashley on Sat Nov 05, 2016 12:20 pm

Could just use an SBF damper on a Boss snout then?

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Re: Crank and rods for 1000hp?

Post  fastashley on Sat Nov 05, 2016 12:21 pm

Never mind, should have thought before tying.

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Re: Crank and rods for 1000hp?

Post  JBR-3 on Sat Nov 05, 2016 12:39 pm

Randy, sounds interesting on the Crower I-beam Ti rods.

What size are they ? Engine ?

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Re: Crank and rods for 1000hp?

Post  Mark O'Neal on Sat Nov 05, 2016 5:23 pm

David Cole wrote:
fastashley wrote:Is there an advantage to the Boss 9 snout?

It's shorter.  The weight of the damper is closer in to the block, so less stress on the crank and #1 main.  It's std on the Callie's crank.  At the time I bought mine the Callie's was not available yet and Scat didn't have it either unless you had them make you a custom crank.   It does take a different damper.  ATI and Innovators West make them for the application.  I have an ATI.  It's essentially a SBF inner hub with a BBF outer shell so the timing marks are in the right place.

And, if you're running belt driven boost, they'll take a lot more side loading.

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Re: Crank and rods for 1000hp?

Post  rmcomprandy on Sun Nov 06, 2016 6:34 pm

fastashley wrote:Could just use an SBF damper on a Boss snout then?

Big Block Ford crankshafts are also available with a SMALL block length snout as well so a small block damper is then used; 3.000" long to a Boss' 3.590".

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Re: Crank and rods for 1000hp?

Post  rmcomprandy on Sun Nov 06, 2016 6:37 pm

JBR-3 wrote:Randy, sounds interesting on the Crower I-beam Ti rods.

What size are they ? Engine ?

These are Big Block Chevy for a Super Modified oval track engine; 6.850" long.

Crower makes them "Custom" almost any size you want.

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Re: Crank and rods for 1000hp?

Post  Scott Foxwell on Sun Nov 06, 2016 6:59 pm

You can also get BB Chev snout. I have a front cover for one.
For 1K HP you really don't need anything special. Standard weight forged crank and H beam rods with 2000 bolts will live a long time. I think the Lunati cranks are Scat forgings.

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Re: Crank and rods for 1000hp?

Post  Lem Evans on Sun Nov 06, 2016 7:14 pm

Scott Foxwell wrote:You can also get BB Chev snout. I have a front cover for one.
For 1K HP you really don't need anything special. Standard weight forged crank and H beam rods with 2000 bolts will live a long time. I think the Lunati cranks are Scat forgings.

Chris keeps telling me that they are the same but, I have several observational issues with that. They may or may not be the same forging but, they ain't finished the same.

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