eagle rotating assemblies

castle5 · 11-04-2007, 04:13 PM

are these eagle balanced rotating assemblies for big block 454 chevys ok ..you see them advertised with 4340 crank and h beam rods with srp pistons. for aound 2000$ are these a reliable way to go. my bracket motors dont see over 7000rpm. have any of you guys built motors with eagle stuff. do they last...thanks for any thoughts on this.

Rich Biebel · 11-04-2007, 05:04 PM

I've used them with no problems. My own previous dragster engine at 461 cubes makes probably 750 hp, alcohol injected and that engine is still running after over 5 seasons. Eagle-Eagle-SRP. 7300rpm every run.

denny harvey · 11-04-2007, 06:32 PM

never used eagle.so i have no input,but competition products.com has a u.s.a. made howards 4340 crank and rods and pistons with rings and bearings for $2359.i have it in my 496 camaro with jerico,it is the 13-1 cr kit.mostly on the street but more then a few 6900 rpm runs..hope this helps

BillK · 11-04-2007, 06:33 PM

cas,
I have checked the balance on a couple of them and they were pretty much right on. You absolutely have to measure everything at least twice. Big Ends and Small ends of rods, and the crank journals. about half of the ones I have seen need the crank ground to make them right, but when you figure the price they are still a good deal. I just ordered one for a Big Block Chrysler.

348Q Mustang · 11-04-2007, 11:34 PM

They have always been my choice. As stated have the crank blueprinted, as I've found their tolerances are too wide. Learned the hard way (2 broken motors in two years) that the ARP 8740 bolts don't hold up. Both motors were rod bolt failures. Upgrade to the L-19 7/16 and you'll be fine. Ran my 521 Ford and 514 Ford 6600 shifts and 6800 traps. The last motor has aprox 150 passes and the new owner is still running it with fresh bearings. I don't think I would run the cranks "out of the box" as I've always had my machinst check all the specs. and true them up and all have needed attention.
On a side note , be sure to run a good quality damper my choice is an ATI.

Oldtimer · 11-05-2007, 12:07 AM

Dont run anything out of the box, check every piece, I still work in a machine shop. There is always something out of spec.

Alan Roehrich · 11-05-2007, 12:57 AM

We've got a ton of Eagle stuff running. I check it religiously, but honestly, I've had ONE connecting rod that was small, and two 4.00" stroke Cleveland main journal cranks that were 0.001" too big on the mains. The cranks were so straight that it was no trouble to grind the 0.001" off. We haven't had anything break. Several 600HP plus small blocks have been running for years. Eagle is good stuff, it is moderately priced, and good quality. So long as you realize that you're not paying for Crower or Callies type quality and you can't expect Eagle to match that quality, you aren't likely to be disappointed.

Rich Biebel · 11-05-2007, 07:54 AM

Eagle Cranks are usually sized all over the place so I've bought them ground .010-.010 new and at a cheaper price. I also juggled bearings to get the right clearance on a 4130 Eagle and it broke in half after a lot of runs in a heavy car. Rods have been ok. I ran the stock bolts for a few seasons with no problem and did upgrade to better bolts as I always replace rod bolts on rebuilds.

11-04-2007, 04:13 PM	#1
castle5 Junior Member Join Date: Nov 2005 Location: indiana Posts: 39 Likes: 0 Liked 0 Times in 0 Posts	eagle rotating assemblies are these eagle balanced rotating assemblies for big block 454 chevys ok ..you see them advertised with 4340 crank and h beam rods with srp pistons. for aound 2000$ are these a reliable way to go. my bracket motors dont see over 7000rpm. have any of you guys built motors with eagle stuff. do they last...thanks for any thoughts on this.

11-04-2007, 05:04 PM	#2
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,275 Likes: 25 Liked 510 Times in 200 Posts	Re: eagle rotating assemblies I've used them with no problems. My own previous dragster engine at 461 cubes makes probably 750 hp, alcohol injected and that engine is still running after over 5 seasons. Eagle-Eagle-SRP. 7300rpm every run. __________________ Rich Biebel S/C 1479

11-04-2007, 06:32 PM	#3
denny harvey Member Join Date: Nov 2003 Location: pataskala ohio Posts: 132 Likes: 0 Liked 0 Times in 0 Posts	Re: eagle rotating assemblies never used eagle.so i have no input,but competition products.com has a u.s.a. made howards 4340 crank and rods and pistons with rings and bearings for $2359.i have it in my 496 camaro with jerico,it is the 13-1 cr kit.mostly on the street but more then a few 6900 rpm runs..hope this helps

11-04-2007, 06:33 PM	#4
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 222 Likes: 10 Liked 26 Times in 15 Posts	Re: eagle rotating assemblies cas, I have checked the balance on a couple of them and they were pretty much right on. You absolutely have to measure everything at least twice. Big Ends and Small ends of rods, and the crank journals. about half of the ones I have seen need the crank ground to make them right, but when you figure the price they are still a good deal. I just ordered one for a Big Block Chrysler. __________________ Bill Koustenis

11-04-2007, 11:34 PM	#5
348Q Mustang Junior Member Join Date: Mar 2007 Location: Otsego, Michigan Posts: 11 Likes: 0 Liked 0 Times in 0 Posts	Re: eagle rotating assemblies They have always been my choice. As stated have the crank blueprinted, as I've found their tolerances are too wide. Learned the hard way (2 broken motors in two years) that the ARP 8740 bolts don't hold up. Both motors were rod bolt failures. Upgrade to the L-19 7/16 and you'll be fine. Ran my 521 Ford and 514 Ford 6600 shifts and 6800 traps. The last motor has aprox 150 passes and the new owner is still running it with fresh bearings. I don't think I would run the cranks "out of the box" as I've always had my machinst check all the specs. and true them up and all have needed attention. On a side note , be sure to run a good quality damper my choice is an ATI.

11-05-2007, 12:07 AM	#6
Oldtimer Junior Member Join Date: Jul 2002 Location: Arkansas Posts: 87 Likes: 0 Liked 0 Times in 0 Posts	Re: eagle rotating assemblies Dont run anything out of the box, check every piece, I still work in a machine shop. There is always something out of spec. __________________ Bob Pagano L88BOB@aol.com www.dyainc.org 4033 AA/SA

11-05-2007, 12:57 AM	#7
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,911 Likes: 994 Liked 1,035 Times in 271 Posts	Re: eagle rotating assemblies We've got a ton of Eagle stuff running. I check it religiously, but honestly, I've had ONE connecting rod that was small, and two 4.00" stroke Cleveland main journal cranks that were 0.001" too big on the mains. The cranks were so straight that it was no trouble to grind the 0.001" off. We haven't had anything break. Several 600HP plus small blocks have been running for years. Eagle is good stuff, it is moderately priced, and good quality. So long as you realize that you're not paying for Crower or Callies type quality and you can't expect Eagle to match that quality, you aren't likely to be disappointed. __________________ Alan Roehrich 212A G/S Last edited by Alan Roehrich; 11-05-2007 at 09:10 AM.

11-05-2007, 07:54 AM	#8
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,275 Likes: 25 Liked 510 Times in 200 Posts	Re: eagle rotating assemblies Eagle Cranks are usually sized all over the place so I've bought them ground .010-.010 new and at a cheaper price. I also juggled bearings to get the right clearance on a 4130 Eagle and it broke in half after a lot of runs in a heavy car. Rods have been ok. I ran the stock bolts for a few seasons with no problem and did upgrade to better bolts as I always replace rod bolts on rebuilds. __________________ Rich Biebel S/C 1479