Eagle Rod Limits

[Guerillah]

Has anyone here ever broke an eagle rod in a 500-600whp motor? Reason I ask is because of the relatively small rod bolt inside, I see revving over 8000rpm to be pushing the limits of it.

 

['98 AWD DSM]

Which rod bolts do you have? B/c I know they began switching from 5/16 rod bolts to 3/8 rod bolts.

 

[talont3t4]

They well work no problem!

 

[TurboSpoolinIns]

Has anyone here ever broke an eagle rod in a 500-600whp motor? Reason I ask is because of the relatively small rod bolt inside, I see revving over 8000rpm to be pushing the limits of it.

I am also somewhat wondering the same thing. Has anyone broken 650 whp and beat on their cars for numerous times after that?

 

[logic]

Has anyone here ever broke an eagle rod in a 500-600whp motor? Reason I ask is because of the relatively small rod bolt inside, I see revving over 8000rpm to be pushing the limits of it.

It's funny you should ask this; I just came across this post from Marco at Magnus Motorsports the other day:

http://www.dsmtalk.com/forums/showthread.php?s=&postid=469342#post469342
I know some people choose to use Eagle because of price, but I wont put that in my motor. Why? because I would rather be thorough and eliminate any possible source of failure. I have seen Carrillo, and Sainz rods bend, which have a similar construction. I know that I have accidentally hit 40 psi of boost and recorded dyno pulls on Crower rods that would blow your mind. All that happened was a blown head gasket, the rest of the motor after careful inspection was put back together and put back into use. If you were racing or tuning, and something went wrong, would you rather replace your entire motor or just change a headgasket? How would youlike to go and find another rare expensive block. That is the reason people buy rods, so they don't punch holes in their blocks. I would prefer to use Pauter as they are slightly lighter in the big and small end and far stouter, but they do not clear the 4G64 and that would be more work to make them fit.

This was posted as part of the big 2.4L thread over at the other board. Personally, I have no opinion on rods one way or the other, but there you go.

 

[4g64GST]

I am shooting for 500+whp and I chose eagles.

 

[swordfish]

The eagles will do it. I personally prefer Pauter. . . and now they do clear the 4G64 since Marco is running a newer design and is now running them in his race car. We run the same 156mm Pauters.

Don Polk has done 580whp on the Eagles and AMS ran them in Adams EVO III which was well over 600whp on spray. A local honda sleeved 2.0L recently maded 627whp on eagles and wiseco's.

I think the main concern with eagle's is that some time back they had a quality control issue that seems to have been solved, but it still lingers in people's minds.

jeff

 

[AMS]

I've got eagles in the EVO8 , it lays down over 600wh and I run it consistantly at that power level. We've use Eagle rods for a while now and never had one rod failure, and they've seen well over 600whp.

-Martin

 

[L2RTSiAWD]

Off-topic posts deleted.

 

[Suparata]

Well I must be in a war with Lady Luck because I’ve just checked FIVE sets myself and had them check their sets at the manufacturer (19 in stock) and they all were sized big and out-of-round. With all the DIY guys I wonder how many like those made from January last year to this date are out there like grenades with the pin pulled?
I believe there are better alternatives out there and just because a part is “popular’ it doesn’t mean that it is great too.

 

[Violater101]

A couple of my friends locally are making well over 620 and they havn't had any problems yet (knock on wood) and they are both using Eagle's.

 

[1fast97gsx]

I'm using eagles and probably making in the 400s as of now.

 

[myblack98gst]

I am running Eagle H-beams... they were sent to the machine shop he checked them out and side they are perfect and didn't have to do anything.......

I also run Eagle, Wiesco 9:1, clevite bearings

 

[95AWD_TSI_TALON]

I am running eagle's aswell. I heard about the "out of round" while my set up was at the machine shop. The machinist said they were perfectly fine, and here I am 14k miles later no problem. But I'm looking at spraying the motor now.....Hopefuly I wont be reposting leting you know the limits

 

[AMS stampy]

at 27lbs of boost my car made 580 WHP on eagle rods. now I am at 30lbs so I have shot past the 600 mark. I have had no problems or signs of any. keep in mind this car is my daily driver.

Eric

 

[CanadianTalon]

Fastest blow-thru carb car in the world runs 7.80's @ 180 MPH, at an over 3000 pound race weight (think it's 3250 but not positive) and it is street driven a fair bit, and raced a LOT. It previously maxed out a 1200 RWHP dynojet with an UNLOCKED glide, and at 180 MPH now it's approaching 1300 RWHP through the unlocked glide, spinning it to 8000, ALL on eagle rods. That's enough proof that they're strong for me, is it enough for you?

 

[ItsStockOfficer]

Fastest blow-thru carb car in the world runs 7.80's @ 180 MPH, at an over 3000 pound race weight (think it's 3250 but not positive) and it is street driven a fair bit, and raced a LOT. It previously maxed out a 1200 RWHP dynojet with an UNLOCKED glide, and at 180 MPH now it's approaching 1300 RWHP through the unlocked glide, spinning it to 8000, ALL on eagle rods. That's enough proof that they're strong for me, is it enough for you?

Yes, using the same eagle rods we do

 

[AMS stampy]

yes, I concur. I am puting 600 through mine right now to the wheels and I guarantee if i threw 1300 at them they would go in a milisecond. they are tough rods. I will tell you what I tell every customer that comes in here. if you have the money for crower or pauter...do it. you are only building a stronger motor. if you are on a budget then stick with the eagles. just keep in the back of your head that they are not rated as high. It all comes down to how much actuall HP you want to push

Eric

 

[psychlow]

Small difference...

4 cyl vs. 8 cyl.

1300HP on 8 rods = 162.5HP/rod

600HP on 4 rods = 150HP/rod

1300HP on 4 rods = 325HP/rod - yeah ... right. On h-beams? For 5 seconds, maybe. :laugh:

 

[CanadianTalon]

Small difference...

4 cyl vs. 8 cyl.

1300HP on 8 rods = 162.5HP/rod

600HP on 4 rods = 150HP/rod

1300HP on 4 rods = 325HP/rod - yeah ... right. On h-beams? For 5 seconds, maybe. :laugh:

The drivetrain losses with an unlocked auto and a RWD car are pretty damn similar to an AWD car with a stick. 1300 RWHP over 8 rods is pretty similar in load to 650 AWHP over 4 rods. That was my point of bringing it up as a comparison.

And yes itsstockofficer, he uses off the shelf eagle H beam rods, the same thing we're putting in our DSM's, albeit shorter.

 

[psychlow]

I just wonder why they don't make solid rods. IE, I-beam with the grooves filled in. It would add reciprocating weight, but I'd think the benefits would outweigh that on a 1000HP engine.

 

[ItsStockOfficer]

The drivetrain losses with an unlocked auto and a RWD car are pretty damn similar to an AWD car with a stick. 1300 RWHP over 8 rods is pretty similar in load to 650 AWHP over 4 rods. That was my point of bringing it up as a comparison.

And yes itsstockofficer, he uses off the shelf eagle H beam rods, the same thing we're putting in our DSM's, albeit shorter.

So....off the shelf eagle rods are the same in width, depth, and hardware diameter from application to application? This is your claim?


Psychlow: Solid metal rods would increase strength 5% and weight 100% and is completely unnessecary is any case.

 

[myblack98gst]

on a recent thread a person from eagle said a sponsored DSM made 83x whp using eagle rods with no damage done.

 

[CanadianTalon]

So....off the shelf eagle rods are the same in width, depth, and hardware diameter from application to application? This is your claim?

Stop trying to argue semantics. No, they arn't 100% exactly the same, but the 302 eagle rods and the 4G63 eagle rods are pretty damn similar in size, so yes, I'm going to say they're similar.

302: .835" Big End Width
4G63: 1.116" Big End Width

Did some searching, that's what I found. They use the same hardware. So just looking at width, you can say the 4G63 rods should be stronger.

 

[hostile]

Here is some info from david buschur. This is from the evo forum since he doesnt really post on the dsm forums anymore.

I have used Crower, Groden and Eagle rods in my engines. The aluminum rods I wouldn't recommend, pain to clearance the blocks, not for street use and I didn't gain jack **** from running them. The Crowers are the best rod going........but the Eagles have proven to be a great rod at low cost that has refused to fail. The machine work on the Eagle is also the best I have found. I have yet to re-size a new Eagle rod, the same can't be said for some of the Crowers I have pulled out of the box. I have gone 7.8 at 175 mph on the Eagle rod, I haven't seen a failure yet. That is over 770 whp through a very ineffient 8" torque converter. I would guess the flywheel hp to be in the area of 950-1,000 hp. This is also running the engine to 10,000 rpm. I am trying to say it is a good rod. This is also the same head we sell to the public, nothing different at all.