Eagle Rotating Assembly
 

I am going to have two 540's (tall deck) built this fall by a local engine builder. He gave me a list of what he is going to use, everything sounds good except I am reading some negatives about the Eagle rotating Assembly (mainly the crank).
It is going to be a mild 540 about 580hp, will I be alright with the Eagle crank?

Re: Eagle Rotating Assembly
 

You will probably be ok at your power level with the eagle crank,i personally don't use them in anything but n/a smallblocks because they are made in CHINA. Comp products in wisconsin sells some nice american forged cranks for around double the price. If you do use the eagle,make sure your machinist checks the crank indexing of each throw and measures EVERY ROD AND MAIN JOURNAL. They are supposed to be forged in china and machined in america but the shop that does my machining locally has found variances in there products (not specifically big block cranks,more often there connecting rods). Smitty

Re: Eagle Rotating Assembly
 

I run an eagle rotating assy. on a supercharged 383 sb, 750 hp running 5400 rpm, so far so good. I 've got 30 hours. Also the shop that did the balancing use eagle pretty much exclusive unless a customer request a differant item. They built alot of circle track engines.

Re: Eagle Rotating Assembly
 

I run eagle in mine with no problems. I've used eagle cranks in almost all the race cars and never broke one.

Re: Eagle Rotating Assembly
 

I've got a short deck 540 making about 625 hp with Eagle crank and rods. No problems. It was built by Flagship Marine. They build lots of engines, and should know what works and what doesn't.

Re: Eagle Rotating Assembly
 

I've had one in my 670hp N/A 540 for around 150hrs now and have had no problems. Smitty is right though, we ended up having Moldex remachine the rod journals , the fillet was too large and even with the chamfered bearings they wouldn't work. I know of 4 others that my friends shop did that have been trouble free.

Re: Eagle Rotating Assembly
 

my crank did come heavy a couple of times and needed a little machine work for perfect tolerances.

Re: Eagle Rotating Assembly
 

It seems that there QC is less than good.

Re: Eagle Rotating Assembly
 

#1 is he using there 4340 crank.you should be fine with that but i went for a callies DS crank its around 899.00.i think the eagle 4340 goes for what around 600.00.id rather spend the couple hundred for peice of mind and a little better crank.and others have had to send out the eagles to be finished anyway.so it may cost around the same.

Re: Eagle Rotating Assembly
 

He quoted me a price of $2,300 for the rotating assembly, I believe that is with the 4340 crank. I just want to get as many opinions as possible before I go talk to him. I want to do it right, but the (thousand dollar) extras are getting old, at the same time I don't want unreliable junk either.

Thanks Guys
Keep them coming

Re: Eagle Rotating Assembly
 

Junk

Re: Eagle Rotating Assembly
 

Thanks for the detailed info!

Re: Eagle Rotating Assembly
 

All cranks need to be checked before the engine is built. I have run Eagles in numerous motors with no problems, and these have been 6000+ RPM engines. Running top dollar parts shouldn't be a reason to not go over all tolerances and clearances with a fine tooth comb, and that is the responsibilty of the engine builder. I have heard of problems with Lunati, Callies, and other cranks, but likely those problems are build problems rather than crank problems. If you trust your engine builder as being competent then spend the extra money on heads or something that will give you a few more HP. Just my .02!

Craig

Re: Eagle Rotating Assembly
 

He's way high on that price.
http://www.flatlanderracing.com/

Re: Eagle Rotating Assembly
 

$2300 should be a price for a complete assy. including bearings and balancing. If that is just for the crank, rods, and pistons he is high as B4 more has mentioned.

Re: Eagle Rotating Assembly
 

Yes that is complete assembly, rings, bearings ect.

Hey, ateco just posted an add for A 540 rotating assembly for somewhere aroun $1750. check them out. He is using scat crank and J/E SRP pistons. top of the line in my opinion. I think
he is in the deale or advertisors section

I had real bad luck with eagle !!!! Broke the crankshaft right in half !!!!

Bulletproof is Billet !!!! Scat or Crower !!

And its not about the HP or Tourqe it was because of 6 footers running at 75-80 !!

Would not use eagle anymore unless in a 300 HP fishboat.:eek:

Ateco engines have the WHOLE assembly for $1750. Scat crank and J/E SRP pistons...the GOOD stuff

if you are starting from scratch, instead of 540 build some mild 572s:rolleyes:

Check the date on this tread . If the assembly lasted this long I would buy the same thing again !!!!!!!! :ernaehrung004:

For sure..but to add to it....my machine shop said the early eagle cranks were not machined well at all, and got a bad rep for that...then started machining them here and have been pretty good, even some of the high $$ enegine builders use them for bracket race engines...to say they will never break ?? well can't say that about anything....Rob

i can,t sey about the cranks,because i haven,t used them,but the rods are good to 850 hp at 7000 rpm.remember rpm kills rods,and most offshore type boats are run 6000 rpm or less.i reacently did a 509 for a guy ,used je 8 to 1forged piston,eagle esp rods,gm 5140 crank,crane roller cam[hyd],edelbrock marine aluminum heads,whippel with innercooler.it has app 70 hard hours on it and no peoblems.

A local builder uses Eagle almost exclusively on all engines below 2000HP, unless the customer wants something different....he said he checks them the same way he checks any other cranks...and sends them back if he finds something he doesn't like..just like he sends back callies, crower, lunati, etc. :food-smiley-007:

I personally know of several 1000hp-1200hp blower motors runing around with Eagle cranks/rods with no issues....

We ran Stock GM rods to 850-900hp for years with no problems, stock GM cranks will eventually let go at these power levels though...:p