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Re: Scat or Eagle for I beam rods
[Re: mr_340]
#1642469
07/08/14 01:03 PM
07/08/14 01:03 PM
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Joined: Dec 2003
Posts: 22,723
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,723
Bitopia
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Enough with the numbers, the H rod is sexier.  And my signature is in full force on this thread.  PS went back and looked at the "numbers", they state a "stiffness" result, shouldn't it be explained/discussed that both those designs have an axis that is stiffer 90 degrees opposite the other by design, and which direction that added stiffness is beneficial and desired, is what makes the choice so varied?
Last edited by jcc; 07/08/14 01:42 PM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Scat or Eagle for I beam rods
[Re: WadeMetzinger]
#1642470
07/08/14 01:19 PM
07/08/14 01:19 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
I'm in the process if building a 500+ HP 416 and I'm going to use one of SCAT's rotating assemblies. I ordered the forged kit and they use to come with the H beam rods but they now come with the I-beam rods, forged crank and ICON pistons. I did some research and spoke to some Mopar engine builder and they said the I-beams are good rods but over 500hp they would tend to use the H-beams so I sent the first one back and got the kit with H-beams. There wasn't much differance in the price and most of the cost was because Mallory had to be added for the H-beams.
So what I leaned from the builder I spoke to is the if your shooting to 500hp or below for racing or under 600 on the street the I-beams will work just fine. I was told the I-beams are forged and the H-beams are billet rods.
Here are some picture of both SCAT rods.
you are a smart man  I think it's more of an RPM thing vs HP but for the price difference why would anyone want the chinese I beam? if it was huge price difference I would understand. but for a few bucks more they are 
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Re: Scat or Eagle for I beam rods
[Re: mr_340]
#1642474
07/08/14 02:40 PM
07/08/14 02:40 PM
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Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi
master
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master
Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
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Quote:
Quote:
I think Rickster is on the right track, but I think he needs to calculate the moments of inertia for Iyy in addition to Ixx that he did. I had this discussion with a friend in Tampa about which plane you think has the highest stresses/loads. If the piston is not centered on the rod, then maybe the H-beam looks more attractive? I never did the calculations for a rod, but I ran a similar analysis on a rocker arm design since I think they put the slot in the top (remnants of the Shivy ball stud arrangement) instead of more like the Chrysler forged rocker arms. The top slot did a lot better than I thought it would and actually was slightly better than the I-beam design.
HYPOTHETICAL is the key word here.....just found it interesting.....I never stated one was better than the other....just that regarding to OP's initial post....I-beams would be fine and even $100 bucks can make or break a decision to build or not....those hundreds add up quick.
I saved a bunch listening to my builder on the 565 for the roadster...he made it affordable and it's still kicking azz today....not every situation deserves the best of the best was my point from the beginning......
Rickster
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Re: Scat or Eagle for I beam rods
[Re: 85_Ram_4speed]
#1642476
07/19/14 08:42 PM
07/19/14 08:42 PM
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Joined: Dec 2007
Posts: 486
IL
knyech1
mopar
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mopar
Joined: Dec 2007
Posts: 486
IL
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I run consistent 11's with my Scat I-beams. I will trust them till I get into the low 10's. I have had too many people's engines fail with Eagle junk, and Eagle tell them tough s%$&, you are on your own. Will never purchase an Eagle piece, and will do whatever I can to prevent others from purchasing their junk as well.
knyech1-
'71 Sassy Grass Demon 340/904. Pump gas, 1.61 60ft, 7.439 1/8 @ 95mph, 11.824 1/4 @ 111mph
"Not too bad for a pump gas 340, full of used parts and hillbilly ported stock heads." - V.B.
'03 2500 5.9L HO 6-spd on 35's. 395hp/755ft-lb at tires.
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