b727pic

iTrader: (1)

I would like someone to explain the technical reason why one would hold up to more HP than the other given I belive they are all forged from the same raw material

I am told the Eagle is good to around 900HP, I find that strange since most here think the stock crank will handle that or a little more.

Katech has a pretty good deal on Cola's but I believe they are saying the same thing....good to around 900 HP

Now what about the Callies racemaster?? is it that much superior to the other two to warrant the extra $$

trying to spec out my new motor....need input!

aux_fast_cam

howards racing cams have callies cranks for $1800 and I've been told 1200hp

you get what you pay for with cranks, depends on what your goals and budget is

Mike@TEA

You need to find out where the crank was actually forged at. Most 4340 cranks that are still made in usa are made at Louisville Forge and are made from a really strong/durable US made 4340 alloy. I believe callies and cola both use them. Eagle/scat and others I am fairly sure come from China which still use an alloy that qualifies as 4340 but is not as good as the US stuff. The rest is machining (tolerances), heat treating, and counterweight design (ease of balancing). I cannot comment on those with Ls-1's because I have not worked with them to know for sure. There is a difference between US 4340 and chinese.IMO! The callies stuff I've seen SBC-BBC was close to dead nuts in terms of sizing and was usually easier to balance.The cola was not bad.Hope this helps.

NLang

iTrader: (12)

Dead nuts you say?

DavidNJ

Let's not forget Crower (or Oliver, HTC).

Callies also uses induction hardening.

I you are really building an engine for an application you will use pistons, rods, and pins for a specific HP/RPM range. They will be as light as necessary for that application. The crank should be the least weight to balance that load and HP/RPM requirements.

The use major US manufacturers (Callies, Crower) can make a custom crank for those specs.

Ferocity02

iTrader: (60)

Of those three go for Callies. Eagle's suck(I have one), and the Cola's are a nightmare to balance from what I've heard.

Air21

is COLA back in business? I gave them a $600 deposit and they went under and noone would answer the phone.

b727pic

iTrader: (1)

Katech is selling LS1 COLA cranks for right around 1K (ebay)

b727pic

iTrader: (1)

Planning on a 383 procharged application. Can't find a consensus on pistons either, seems everyone has an opinion but not necessarily direct experience with specific brands. as for Pistons I most likely will need a custom set, can't seem to find an off the shelf 4.0 stroke, 6.125 rod, 3.905 bore that yields 9.5cr with a 64CC head / .050 gasket

I was wondering about the China Vs US steel factor, you usually do get what you pay for, just trying to figure the difference in cost assuming the same forging material.

DavidNJ

Custom pistons will be either Wiesco, CP (my choice), or J&E.

Give Callies and Crower a call. Callies will spec Carillo rods. Crower will make their own.

Either will give you a balanced assembly for $4k-4.5k.

Katech_Jason

iTrader: (19)

No
We have a stockpile of them. They're very reasonably priced.

Bo White

iTrader: (59)

The main thing about Eagle is its not ready to go in an engine straight outta the box, it has to be tweaked here and there on the tolerances. Its priced very well but the cost doesnt end when you buy the product- still though its cheaper after the tweakin is done. I love their 383 kits for the LS1 and will continue to use em but thats because I know whats involved in using their stuff successfully.

1QuickT-A

iTrader: (12)

I have Custom Nitrous Diamond Pistons, Lunati Pro Billet Rods (1200hp) and a Callies Crank in my 408.. I did alot of research on pistons, rods, and cranks for the LS1's.. I believe that the Callies Crank is the best of the best and the Lunati rods are hands down the strongest steel rod out there without going to an aluminum piece.

Like Bo said.. The Eagle cranks are priced nicely, but their is a little work left to be done when it comes to balancing them from what a few major engine builders have told me. So keep that in mind. But, I doubt you would ever break the Eagle crank with 7-800rwhp if it is "tweaked" correctly..

Diamond can custom make you a piston to work with your setup.. They are very nice pistons and they will hold!

Ferocity02

iTrader: (60)

IMO, the Carillo rods are a better rod in terms of strength than the Lunati Pro-mods. I have the the Pro-mods going into my engine and they certainly are a nice piece. I have heard some bad things about the Pro-billet rods. Many say that they flex under high load, which wouldnt suprise me.

b727pic

iTrader: (1)

Thanks guys....

pianoprodigy

iTrader: (1)

Where do Lunati cranks fall in the mix?

b727pic

iTrader: (1)

I was wondering the same thing????

Also saw where Childs & Albert has an LS1 crankshaft they have started to advertise.
Also starting to see references (Scat Enterprises)to EN30B material which is supposedly stronger than the 4340

Ferocity02

iTrader: (60)

Lunati cranks are above all of these. Thats my opinion at least, each to his own.

mach1

iTrader: (6)

Opinions on Sonny Bryant cranks?

squealingtires

iTrader: (14)

What are you after in a forged crank? You are probably after strength, right? Now try to find someone who has actually broken an Eagle crank and ask them the conditons. I'm one of many people running an Eagle in my 402. Now I'm not making anything close to 900 HP and I never anticipate that thing coming apart. Now ask yourself what you could do with the $1000 you just saved. Lots of good pointers in the post for you to follow up on. Choose your goals and consider your budget. Building a 1200 HP engine is no joke, consider all the costs of your "goal" engine and remember that it's only as strong as the weakest link. And if you change you mind at some point and want to get rid of some components remember that its easier to get rid of higher quality parts than cheaper ones. Good luck