Re: H or I beam?
[Re: DusterKid]
#495526
10/12/09 04:24 PM
10/12/09 04:24 PM
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Joined: Jan 2003
Posts: 9,826
las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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stock stroke eagle crank?
h beams are stronger...but weight more
I beams will be strong enough considering the 6500 rpm...and are lighter...
i would use the I beams...got a set in a bracket motor...
Tony
70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: H or I beam?
[Re: DusterKid]
#495529
10/12/09 09:07 PM
10/12/09 09:07 PM
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Joined: Nov 2003
Posts: 3,060
Western New York
sixpackbee
master
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master
Joined: Nov 2003
Posts: 3,060
Western New York
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I beams are the way to go.
1959 Bugeye Sprite
1967 Charger Black L code
1967 Coronet R/T Convert Green 440 auto bought from original owner
1968 Charger R/T Bronze 440 4 spd console AM/FM
1969 Super Bee WM21H B5 A40 D21 N96
1969 Barracuda Formula S 340 Convert pilot car
1969 Hemi Road Runner RM23J D32 Omaha orange 4.10 Dana N96 N85
1970 Super Bee WM23N FE5 V1X 3.91 axle package, N96
1970 Road Runner RM21N B3 V1X D13
1971 MG Midget
1971 Road Runner RM23H GW3, A57
1972 Road Runner RM23P FY1, D21
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Re: H or I beam?
[Re: 70AARcuda]
#495530
10/12/09 10:19 PM
10/12/09 10:19 PM
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Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
Moparnut426
I Live Here
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I Live Here
Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
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Quote:
stock stroke eagle crank?
h beams are stronger...but weight more
I beams will be strong enough considering the 6500 rpm...and are lighter...
i would use the I beams...got a set in a bracket motor...
From what I have read, the I beam is stronger, and lighter. Our Oliver rods were I beams, and the King rods in the late model are I beams. My childa are I beams, and almost every high revving steel rodded race engine I know of that a budget wasnt in mind has billet I beams, or the new A beams in it. I like the H beams, but have seen many twisted, and many eagle H beams making windows in 340, and 360 mopars. Im sure there are just as many I beams breaking also, but usually something else fails first.
My vote it I beams. Crower, Manley, Oliver, R&R, Howards, Scat, Lentz, Arrow, and Carrillo all have nice I beam rods...
KAsey
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Re: H or I beam?
[Re: DusterKid]
#495531
10/12/09 10:26 PM
10/12/09 10:26 PM
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Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
dodgeboy11
super stock
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super stock
Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
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Quote:
Building a 360 strictly for the strip. Will have a Eagle crank, .060 flat tops, probably a .528 mopar performance mechanical cam, eddy heads, victor 340 intake. Will be shifted 6000-6300 and go across the finish line at 6700 in a 3200lb car. Would an I beam or H beam connecting rod be better for this application? looking at the scat rods. Thanks.
Flip a coin IMO. The cheap I beams, ie, the eagle SIR's and the Scat I beams, are a lighter duty rod and as such, do weigh less than the H-beams. But when you start getting into the heavy duty stuff, the weight difference is not so much, if any.
One question, is that a cast eagle or forged? Another quick question, if you're buying crank, rods and pistons why not go with the 4" crankshaft?
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Re: H or I beam?
[Re: Moparnut426]
#495532
10/12/09 11:10 PM
10/12/09 11:10 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
stock stroke eagle crank?
h beams are stronger...but weight more
I beams will be strong enough considering the 6500 rpm...and are lighter...
i would use the I beams...got a set in a bracket motor...
From what I have read, the I beam is stronger, and lighter. Our Oliver rods were I beams, and the King rods in the late model are I beams. My childa are I beams, and almost every high revving steel rodded race engine I know of that a budget wasnt in mind has billet I beams, or the new A beams in it. I like the H beams, but have seen many twisted, and many eagle H beams making windows in 340, and 360 mopars. Im sure there are just as many I beams breaking also, but usually something else fails first.
My vote it I beams. Crower, Manley, Oliver, R&R, Howards, Scat, Lentz, Arrow, and Carrillo all have nice I beam rods...
KAsey
I've been running Eagle H-beams in my engine for
over 5 years now at 8200 rpm on every pass... have
been up to 9500 but didnt make any more power over
8300
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Re: H or I beam?
[Re: MR_P_BODY]
#495533
10/12/09 11:21 PM
10/12/09 11:21 PM
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Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
Moparnut426
I Live Here
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I Live Here
Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
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Quote:
Quote:
Quote:
stock stroke eagle crank?
h beams are stronger...but weight more
I beams will be strong enough considering the 6500 rpm...and are lighter...
i would use the I beams...got a set in a bracket motor...
From what I have read, the I beam is stronger, and lighter. Our Oliver rods were I beams, and the King rods in the late model are I beams. My childa are I beams, and almost every high revving steel rodded race engine I know of that a budget wasnt in mind has billet I beams, or the new A beams in it. I like the H beams, but have seen many twisted, and many eagle H beams making windows in 340, and 360 mopars. Im sure there are just as many I beams breaking also, but usually something else fails first.
My vote it I beams. Crower, Manley, Oliver, R&R, Howards, Scat, Lentz, Arrow, and Carrillo all have nice I beam rods...
KAsey
I've been running Eagle H-beams in my engine for
over 5 years now at 8200 rpm on every pass... have
been up to 9500 but didnt make any more power over
8300
WOW, thats good machining to keep stuck together at those RPMS!!
Nice 
Kasey
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Re: H or I beam?
[Re: Moparnut426]
#495535
10/12/09 11:47 PM
10/12/09 11:47 PM
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Joined: Jan 2003
Posts: 3,505
DFW
mr_340
master
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master
Joined: Jan 2003
Posts: 3,505
DFW
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Quote:
My vote is I beams. Crower, Manley, Oliver, R&R, Howards, Scat, Lentz, Arrow, and Carrillo all have nice I beam rods...
Some very nice rods in that list. I think the H-beams are just cheaper to machine than the I-beams. I'm partial to I-beams myself. I bought some Manley I-beams for my Hemi project. They weren't cheap, but Manley rated them for 850 HP vs. 800 HP on the H-beam design. The RPM range is more of a factor than the power level. They also use a better rod bolt, so that might be the difference. 
Floyd Lippencott IV
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Re: H or I beam?
[Re: mr_340]
#495536
10/13/09 12:14 AM
10/13/09 12:14 AM
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Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,423
Kalispell Mt.
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I have set of Crower I beams to put in my motor and they weight as much as a stock rod, I was thinking they would be nice and light like a SCAT, now I kinda wish I had just bought the SCATs I beams, the Crowers are WAY over kill for my motor.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: H or I beam?
[Re: mr_340]
#495537
10/13/09 12:20 AM
10/13/09 12:20 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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apples to apples, Scat I beam compared to Scat H beam?
the H beam is a better rod.
not all I beam rods are created equal. the Scat pricing is even reflective of the difference.
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Re: H or I beam?
#495538
10/13/09 01:25 AM
10/13/09 01:25 AM
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Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
dodgeboy11
super stock
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super stock
Joined: Feb 2007
Posts: 1,025
Las Vegas, NV
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This is how I rate the connecting rods:
Eagle SIR for step up from stock or stock replacement.
Scat I beams (for the small mopar) are 4340 steel and are a step up from the Eagle SIR's
From there I look at Scat, Eagle, RPM H beam rods as being about equal. Prolly want to throw the K1's in there too. I think they're making the lower cost rods for Callies??? someone care to correct me there?
Oliver and Callies from there.
Pankl at the top of the list.
I know there's more rod brands out there and, imo, they fall into the scale there somewhere. Keep in mind a rod's strength is dependent on many things, stroke, piston weight, rpm and rod angle to a point.
Now as to the H beam vs I beam topic, I really think that for most applications you can just pick whichever's most readily available. I do know Oliver uses an I beam because they can drill the beam for pressurized wristpin oiling.
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Re: H or I beam?
[Re: FlyFish]
#495540
10/13/09 09:30 AM
10/13/09 09:30 AM
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Joined: Apr 2003
Posts: 1,613
Burlington,Ont.
77DragracerR/T
top fuel
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top fuel
Joined: Apr 2003
Posts: 1,613
Burlington,Ont.
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Quote:
Scat I-beam. For that power level, they are lighter and will handle the abuse no problem. I have a set in my stroker motor.
I run a Scat 408 Kit with KB744 pistons,I beams,& forged 4" crank.This kit was a great deal IMO.
Plus no need for notching as you do with H beams.
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