Eagle SIR rods in SB stroker

[CudaMike]

Engine gurus, what do you consider to be the safe limit in terms of HP/TQ/rpm for a 4" stroker SB using the Eagle SIR rods? Oh yes, forgot to mention, swinging 600 (475 + 125) gram piston/pin combo. Thanks

[gotcha]

CudaMike....while I'm sure there will be varied opinions on this, I have just started using the Eagle SIR rods due to their value (workmanship, quality, weight, bushed pins, ARP bolts, etc. vs. dollar spent.)

On what I call a very good hot-street...strip combo engine, I will get 500+ hp, 522 ft/lbs. @6200. I am sure the rods are capable of more rpm, but the 4" stroker is all in by 6250. Granted, this is limited or extended by your head & cam combo. I can see no real problems with this rod. The small block design is inherently weak in the oiling system. I enlarge all the passages, including oil filter area, use a good pan and pickup, and see no rod bearing problems when RPM is kept below 6500. You have a relatively light piston and pin combo, so there is no excessive weight slinging around on the rod.

550 hp and 585 ft. lbs. would certainly work, but still at about 6250 rpm. High rpm on this engine is really wasted motion, and torque is what moves your vehicle.

I figure about 1.2-1.3 hp. per cubic inch on these engines. There are others out there that will get more hp and torque, but this is the type of engine I build.

I personally like the rod and have no bad comments. I think it is one of the best values to come along for small block Mopars in a long time.

[AAR4fun]

I am currently running Eagle Sirs in a SB with a 4" stroke. The 4" SB is an awesome setup. It's like a baby BB.

Word of caution: There were some manufacturing problems with the SB SIR rods, especially prior to 2001. Problem was with the machining of the crank journal end not within tolerance. Check the manufacturing date stamped on the box and have the rods inspected by a competent machine shop regardless of the manufacturing date.

I chose these rods simply for their weight to strength. I blueprinted my engine and the assembled rods, bearings, piston, pin and ring assemblies are within 1 gram of one another without having to balance the individual components. The crank is another story. Quite a bit of mallory metal was added to the counter weights to internally balanced the assembly.

Car is a hot street application and runs great. I still have carb tuning issues to contend with. Seems as though the end carbs open too late and too quick. I can't push the go pedal down much till third gear without the back end coming loose, way loose... This is in a OEM dressed E-body, not a light car.

[cuda66273]

Eagle rods are manufactured in China with technology stolen from American Manufacturers and produced in a Country that does not support our War on terrorism, holds our Citizens hostage, steals our planes, uses slave/child labor, pours our American dollars into the developement of Nuclear Arms pointed right at us and inundates our economic infrastructure with cheap low quality copies of American designed and developed products with NO R&D what-so-ever...it's your choice.

[72Challenger]

C'mon Cuda - it's not healthy to bottle up your emotions. Tell us what you really think!

So, while I agree with you 100% on the boycott, please tell us what rods you do recommend for a 500 HP or less SB, to get a good price/performance combination.

[cuda66273]

I'm not going to started on this chink stuff today, I'm heading out in about and hour to spend the weekend tuning on 4 fine race cars and coaching my Crew Chief and good friend Brian "Coil" the Main Man Hall with his first attempt at driving the Cuda...I gave him the keys for the weekend and as I've heard here from someone..."you couldn't slap the smile off his face." and I'll add "With a 4'- 2x6"...so you can't ruin my weekend no matter how hard you try

My choice for rods...500 HP or less... stock 340's or the somewhat hard to find heavy Mopar 318 rod, also sometimes found in the 66 and 67 273 engines, RPM should be limited to 6400 or less but that's my opinion..I think BillyDelRio winds his to about 7500 and has for several years and has no problems. Of course this nessesatates(sp) the need for a good light weight piston and of course the best rod bolt money can buy.


If I felt the need to beef up the rod I would go to Oliver and get a set of their forged light weight Chebby 6.125 Sportsman rods and have them cut to fit the Mopar crank..no big deal.....It's a couple of hundred bucks more than the Eagle Chow Yuk's but some American Machinist, salesman, secretary and all the rest of the people involved will have a job, pay taxes and support the Social Security program.. that I may soon need.....

That's it I'm going racin'..err ahh crew chiefing...Ya'll have a nice weekend.

[AAR4fun]

See whatcha gone and did CudaMike. He's all wound up again.

Don't say "Eagle", say something like "Bird with receeding hairline in the category of endangered species" or "Feathered creature with the same name as the condensed milk product".

Don't say "SIR", say something like "Sometimes Irregular Rods" or "Serious Inspection Required" or "Sound Inside Rattley".

Heh, heh, heh... All in fun...

[CudaMike]

AAR, LOL!
I'll be more careful next time!
:-) ;-p

[Doug Wilson]

Did anyone mention that these rods are made in China?

[lenweiler]

Does any one know who owns Chrysler.

[Doug Wilson]

Daimler - Germany. If you could get German built rods, they'd probably be better than American built ones... but, they'd cost $1,000 each, and be made of Unobtainium.

[lenweiler]

Unobtainium. Good one Doug. Can I use that?

[Doug Wilson]

Sure Len... but only you.

[gotcha]

Hey Doug....that "unobtainuim" is really good stuff
.......when you can find it.


Seriously....it's kinda sad that we cannot produce quality products at home that the average performance enthusiast can afford.

BTW....for those who are considering using the Eagle SIR's.

I check closely on the side clearance on the rods. About every other set needs to have machine work done. They are very tight on the rod journals (side to side)

[lenweiler]

You guys almost sound as whacky as me (Johny Canuck). Better re-evaluate your thinking. Hell, you guys are producing most of the serious and affordable parts for this insane (sometimes) hobby. And I'm not patronizing you. Where do the blocks, cranks (some) heads etc. etc come from if it isn't the USof A. Not to mention the begining point, the cars!

[Doug Wilson]

I understand that the only Unobtanium mine on Earth is in Paranormal, New Mexico - near Roswell. There are some deposits in the Asteroid Belt, however.

[70RoadRunner440]

Dont waste your money on that chinese crap if you have any plans on racing it.
I have a severe opinion on many parts, and thats becuase of my buddies experiences in bracket racing.
Personally for the small block your building i'd look at Manley. Built in JERSEY! Not China.

[Doug Wilson]

Are you SURE Jersey isn't in China? I used to live there, and it FELT a lot like China... or somewhere.

[70RoadRunner440]

Haha, dont know the part you were in, but not in my area.

[Doug Wilson]

Just kidding - New Jersey has a lot of natural beauty. I lived in Mt. Laurel & worked in Philly. Spent a lot of time in the Pine Barrens... really beautiful! Funny little deer, though!

[70RoadRunner440]

Doug, just like you said, it depends on what part of NJ you found yourself in.
Some parts are crowded and generally suck, others are nice for cruizin'

[72Challenger]

Know why New Yorkers have such bad tempers? Because the light at the end of their tunnel is New Jersey!

Seriously, never lived there but have a friend who does, and I've visited a few times, a fine state. I'd rate it in the top 50!

[70RoadRunner440]

Hehe i love the jokes. I think Cuda Mike will get upset if we dont get back on topic....UH, Rods!

[cuda66273]

I hate to bust your bubble....but you better call Manley...or search out my post which contains a direct quote from there head of marketing...goes something like this.."Our rods are forged offshore in an asian country, but our valves are made here"....can you read between the lines?

When asked if that asian country was China they never replied....

More Choy yuk..no, no, Yuk have vegables

Buyer beware..ask before you order..

[tcvpar]

question ?? if im not mistaken the first cars were french///
no offince [sp]
here in the usa ,we change the part #,, and the price goes upppppp,,why? because we will pay it//
yep im the old fart . got in the NAVY in 1952.went no where thank you GOD.. then a truce , so i was safe or was i?
america lives, and i hope we all realize what we have. and do our best to remember , ALL who died in ww2... to make what my age group has kinda muddled up.. sorry guy,s .. kinda teers me up.. have been on other sites and come back to this one ... its more like friends and home

[70RoadRunner440]

Cuda,
those sneaky...Run Crower then, thats whats going in my motor.

[70RoadRunner440]

LOL,
Manley is still goof for there valvetrain equipment, but i wont be using there rods any time soon.
I dont trust chinese metallurgy enough to put it inside a motor i'm building for racing.

You can always go to Carillo for rods!!

[Doug Wilson]

Answer to topic: Don't use Eagle rods.

[CudaMike]

OK.
I have a set of new Eagle SIR rods for a small block that I could let go for, maybe, $800, if anyone is interested. I would like to have a set of American made rods.
Didn't mean to get ya fellas upset. Sorry :-( :-(