i have a brand new eagle forged crank and new eagle 5.7 h beams....

now i was told that the crank is garbage and they are very unreliable....

thats what the local machine shop is telling me... he says they are garbage and most of them break with little effort.

has any one here had good luck with the eagel crank? this will be in a twin turbo 383 lt1

shooting for 600+ rear hp...

i will probably put the better bolts in the rods..


or shoud i throw all this eagle stuff in tha garbage and buy somting else?

 

Eagle actually aren't a bad choice especially if you're trying to build on a budget...A lot of people use them in LT1 and LS1 engines...They're way better than stock and if you already have them then I would say to just run them...

 

You can do 600rwhp with a stock crank no problem... the eagle crank will for sure be more than enough.

 

I was asking the same question a few months ago when my machine shop told me Eagle cranks were no good. I did a search on this forum and on the Corvette forum.

I discovered that two opinions (and they were only opinions) were the most common. One being that the Eagle crank required more prep than others to get it ready for a build. The second most common opinion I found was that Eagle had a quality problem when it first came out that has since been corrected.

I do not remember anyone indicating that they had experienced a failure due to an Eagle crank although I would imagine they are out there. Everyone has a failure once in a while. My searches indicated that there are a whole bunch of people running an Eagle crank. Consistently faulty LSx parts tend to float to the top on the forums pretty quickly but at the same time the net is word of mouth. It's kind of a rumor mill so you have to use your own filters to seperate truth and fiction. This has sometimes led me to believe a product was great only to discover it was not after I bought it. It goes both ways.

I have an Eagle crank in my SDPC built LS2/402. Four months and so far so good. Now, does Callies make a better crank? Some think so, and one of those someone's is Lingenfelter. But a Callies will set you back over $2000. Is it worth it? In the end it's you that has to decide. I think that's part of the fun. I can say:

"Yea it runs great and it was me who decided how it should all be put together, I selected the technology and all of the parts, I am the architect."

That also involves risk, make the wrong decision and you must pay the penality. So, I do my research carefully and I have developed a network of knowledgeable people I have faith in. Even so I still make a mis-step once in a while. GM spends piles of money and many man hours proving out their designs and combinations of parts, we have to do it on the fly.

I would use the Eagle but I would carefully check the clearances on every bearing and make sure it is balanced and straight. But you should be doing this no matter which crank you use.

Good luck with your project.

 

They are good cranks for the money, just take a little more balancing/machine time than some other brands.

Worm Boy supposedly has one in his LS1. 8.20 @ 170 mph with a 91.5mm turbo.

 

I've heard the cheaper the crank, the more balancing you have to do.

 

They require more prep work. I was going to get an Eagle and my engine builder told me by the time he did the prep, I would be about 200.00 shy of a Callies...so I went with it. For 600rwhp, it's plenty good.

 

cool cool

i dont care if it costs more to balence as i got the whole asembley cheeper than what a usa made crank goes for...

 

ive had an eagle crank in my car for about 7 years,propubly one of the first that they made,no problems,has held up to everything ive thrown at it,nos,blowerand finally twin turbo resulting in over 1000 rwhp,would not hesitate to use another

 

My buddy is having a motor built using an Eagle crank. The builder told him that Eagle stuff was fine as long as its machined properly.

 

Sounds like they are trying to sell you one of there product's. If they are persistant I would look for another machine shop.

 

We have found two Eagle cranks to be slightly bent. I wouldn't hesitate to use an Eagle but you do want to have it checked out. We personally prefer to go with the Callies crankshafts when we build engines for customers. Bob

 

ya its total garbage, mail it to me and ill dispose of it, ill even pay for shipping.

eagle, callies, lunati all made of 4130 all come from china
havent heard of anyone breaking one, did hear when they first came out that a few of them had some problems of clearancing and balancing, which eagle fixxed later.
i wouldnt be scared to use it.
If they do come in bent like EPP said, then youd just have to send them back and get a good one. just check them out i guess

 

how would you check if it was bent?

 

Our machine shop finds it for us when we have the rotating assembly balanced. Its not hard to straighten one either, you don't have to send it back. Bob

 

I put a Eagle 4.100" my new 418cid andthe machaine shop said it balanced out nicely .

 

Check the crank for the pilot bearing clearance. My stock style pilot bearing practically slipped right in. Eagle apparently has been knurling stock pilot bearings to give them more of a press fit. I called them and they sent one to me for free, but it would have been nice to know beforehand. I don't know how many of their cranks have this problem.

 

I put a new pilot bearing in my Eagle crank shaft 4.100" and it fit perfect (tight) .Maybe thay have fixed the problem

 

It was supposed to be an early problem that they have since fixed, but I got mine less than 1 year ago.

 

i got mine around two months ago