EAGLENODULAR STEEL 383CRANKSHAFT ARMORED FINISHFOR SBC CHEVY1pc REAR MAIN SEAL ENGINES.
The part number for this crankshaft is 103523750+Armor finishThis is a first line product directly fromEagle engine products.
The Armored finish on the Eagle crank is very impressive. We have never seen a crank with such a smooth and brilliant finish. Thejournalsurface far exceeds cranks that have the so called micro polished surface.As mentioned in the articles below it does stand to reason that this crankshaft will create a decent increase in horsepower through efficiency. The best gains in horsepower are when you have increased the efficiency of the engine, as they create less friction, therefore reducingheat, and wear, not to mention fuel consumption is decreased. This is an introductory price. The Armor finish option is a $175.00 upgrade. We have a full line of King bearings, and strongly recommend the HP race series rather than the street series. The reason for our opinion on this is that one of the benefits of the race series bearing is that it has a very smooth R/A finish on the surface compared to the street series. It makes good sense to use the bearing with the better surface to further increase the benefits of the ultra smooth Armored finish. The race grade King bearings are what all race engines use, and the smoother surface is only one the benefits over the street series bearing. The cost to upgrade on these bearings is well worth it and a true compliment to the Armored finish Eagle crank. We have a full line of King bearings in our other listings. Please read the articles below for more info. on the Armor finish.
092 radius on rod, main journals, rear seal & snout for increased strength.
Reliability at an affordable price.
Each "ESP" Armored finishcrankshaft is inspected for dimension, size and stroke accuracy.
Journal finish of 6 R.A. or less.
1Piece Rear Main Seal
ExternalBalance - Use400 Harmonic balancer and flexplate.
Stroke
Rod Length
Bobweight
Rod Journal
Main Journal
balance
3.750
5.700 or Longer
1855*
2.100
2.450
External
Eagle Specialty Products, Inc. is proud to introduce ESP Armor finishing. ESP Armor is an optional finishing process offered on all new crankshafts, connecting rods, and assemblies purchased from Eagle. ESP Armor is unlike any process offered by any other crank or rod manufacturer.
What is ESP Armor?
ESP Armor is a revolutionary new surface finishing process developed exclusively by Eagle Specialty Products, Inc. The exact process is a closely guarded secret, but you can know that it does not use any chemicals or electrolysis-type processes. It is also not a coating.
Most people when they see a crankshaft that has undergone the ESP Armor finishing process will mistake it for a chrome process. It is not chrome! The material you see is the same material on the surface that you have always seen - just finished to perfection. Well, maybe nothing is perfect, but this finish is closer than anyone has ever gotten.
The finish is truly amazing. It literally is a mirror finish. Looking at the journal is like looking at your reflection in the mirror! Pictures just don't do it justice (have you ever tried to photograph a mirror?). You have to see it first-hand to really appreciate it.
Now, you may ask, "well all that is good, but what about functionality? What does it do for me?". In theory, the near-perfect finish will let oil slip on the surface more effectively. Think of it like a tire hydroplaning on a patch of water. A treaded tire (like a typical crank surface finish with small imperfections) will not glide across the water - it will "dig in".
While this is what you want a tire to do, on a crank journal you want the crank surface to glide easily on the oil film. A "slick" tire will hydroplane much more easily just like a more perfect surface on the crankshaft journal will glide on the oil film more easily.
You may think, "well, my journal is micropolished with the best equipment, it can't be that much better, can it?". Keep in mind, the oil film that is present between the crank and the bearing surface may be as thin as .0005". that is 8 TIMES thinner than a sheet of paper! We are talking about microscopic differences here! While this is, by far, the main advantage ESP Armor has to offer, there are also other benefits as well. The better surface reduces the "handles" for any fluid to hang on to - including moisture. For that reason, corrosion resistance is greatly improved. This also reduces stress risers, which are convenient places for cracks to start.
The Proof
Ok, we all know theory is great, but if it doesn't show up on the dyno - nobody cares. As of February, 2009 we have conducted two tests on our own and had several of our customers independently conduct their own tests. We'll focus on the tests we performed. Each engine was built locally by an engine builder not affiliated with us. We have used them in the past with other tests and we trust their attention to detail and experience. We used a dyno shop with O.E. testing experience that knows how to conduct true, back-to-back testing without skewing the results.
The first engine was a 383 cubic inch small block Chevy built with typical components a streetable, naturally-aspirated performace engine would have - nothing weird. It was first dynoed with one of our standard crankshafts and produced 440 peak horsepower.
The crankshaft was then removed, cleaned, put through the ESP Armor process, and then re-installed. Same bearings, same everything - the only thing changed was the crank underwent ESP Armor. An important thing to note is that this process does not remove any metal - the journal size (as well as the clearances) were exactly the same. The result was a peak gain of 16.5 horsepower at 5200 rpm and moderate gains across the working rpm range. That's almost a 4% peak gain in power! We did not tell the dyno shop what we had done to the engine only that we wanted to make sure and duplicate the conditions under which the first test was done. One interesting thing the dyno operator noticed was that the second run took a lot longer to heat the oil up to temperature. It had to be run 10-12 minutes longer to bring the oil up to the same temperature as the first test. Immediately, we knew we would see good results. Heat is almost a direct result of wasted energy due to friction and inefficiency. The new surface resulted in less heat in the oil, so we knew the efficiency was improved, and more power would be made.
The second test we performed was even more impressive. We used the same people we used before, but this time we tested a 496 cubic inch big block Chevy. This engine was a typical alcohol-burning drag race setup. The baseline peak power was 705 horsepower at 6600 rpm. Same procedures as before, with the same oil temperature indicators as before.
This engine, however, gained a whopping 30 horsepower at 4900 and 5500 rpm! the gains were across the board with a minimum of 6 horsepower gained at 6700 rpm and an average of 19.7 horsepower gain from 4500 rpm to 6900 rpm. That's even more than we expected! In retrospect, the heavier parts and higher loads inherent to a big block making that much power should show a greater increase because so much more is usually lost due to friction. Another benefit realized by ESP Armor is mileage. Usually, racers are not too concerned with mileage, but this process does not require the engine to burn more fuel to make more power - it simply improves the efficiency of the engine so that more of the power already made is transmitted to the driveshaft.
Future Tests
Our next tests will include a forced induction V8 and a high-reving, turbocharged, import. Both of these engines produce very high power-per-displacement and have very high bearing loads and therefore should show big gains from ESP Armor.
Our Customers' tests
We have also had some customers who did their own testing of our ESP Armor process. Nothing can replace doing a test for yourself! One of which, was World Products who reported a 25 hp gain on each of two big block engines that were built for a twin-engine marine application. We are not in a position to go into details of their experiences. So if you want to know specifics, please give them a call at 631-737-0372.
It Just Keeps Getting Better
So, now you've seen the numbers. You should feel confident in the gains associated with ESP Armor. What more can there be? Well, we are also so confident in the strengthening qualities of this process (which is difficult to test) that we will stand behind any standard-weight forged 4340 crankshaft or set of connecting rods finished with ESP Armor with a ONE-YEAR LIMITED WARRANTY against breakage. Now, if you forget to put oil in it, hydro-lock it, forget to tighten the bolts, or something like that we won't cover your mistake. But built and assembled properly - we will stand behind it! That's right - a warranty! What other crank and rod manufacturer will do that? Talk is cheap, we have shown you the results, we stand behind it with a warranty, and for a price of only $175 for a crankshaft or $99 for a set of eight rods - there is no reason why every crankshaft and connecting rod set you use shouldn't take advantage of ESP Armor!
The surface finish is perfect with ESP Armor. The improved surface allows oil to glide effortlessly along the part greatly reducing running friction and improving oil shedding. Oil temperatures will be lower. Bearing wear is reduced. Durability is increased. And most importantly, less friction means MORE POWER and TORQUE!
Recent independent tests have shown as much as a 30 HP INCREASE (700 hp big block Chevy) when only the crankshaft is finished with ESP Armor. This process, available exclusively from Eagle, also strengthens the part by reducing microscopic stress risers in the surface of the part. Corrosion resistance of the part is also improved. Because of all of this, when any standard weight forged 4340 crankshaft or standard weight H-beam rods are finished with ESP Armor, the part includes a 1-year limited warranty!
Below is an excerpt from Hot Rodding magazine aboutthe new Armor finishing process
We first saw Eagle’s ESP Armor process at the Performance Industry trade show last December. At first visual glance, it has the shiny appearance of an industrial Nickel plating, but we’re told it’s not. When pressed harder about the actual process, Eagle representatives were understandably tight-lipped. Hey, if you had a new surface process that added as much as 30 hp to an otherwise identical 700hp big-block Chevy, you’d play your cards close to the vest, too.
The 30hp figure was from an engine test run by Eagle by an independent lab, and was performed on an engine that had its untreated crankshaft dyno tested, then ESP treated, then dyno’d again. According to Eagle’s official press release: “ESP Armor is an optional finishing process offered on all new crankshafts, connecting rods, and assemblies purchased from Eagle. ESP Armor is unlike any process offered by any other crank or rod manufacturer. The surface finish is near perfect with ESP Armor. The improved surface allows oil to glide effortlessly along the part greatly reducing running friction and improving oil shedding. Oil temperatures will be lower. Bearing wear is reduced. Durability is increased. And most importantly, less friction means more power.
Horsepower rating for this crank isapprox. 500
We have thiscrank for 2pc. rear main seal engines, see our other listings.
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