... eagle rods... h-beam vs i-beam...
02-13-2003, 04:18 PM
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Re: ... eagle rods... h-beam vs i-beam... (1.8T_EG)
It really depends. If you are just sitting there looking forward, they are H beams. Once you swivel your head 90 degrees either direction, then they become I beams.
02-13-2003, 07:07 PM
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Re: ... eagle rods... h-beam vs i-beam... (inspyral)
don't quote me on this, but I always thought it was because the top of crowers/hondas flared the top ring out to create a I-shape...and the eagles dont flare leaving the shaft of the rod straight and thus looking like an H...
02-13-2003, 07:37 PM
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Re: ... eagle rods... h-beam vs i-beam... (Hatchblack)
It really depends. If you are just sitting there looking forward, they are H beams. Once you swivel your head 90 degrees either direction, then they become I beams.
...anyways, are there any advantages to running one or the other?? ...i searched on here and i thought that one was better for high rpm's... correct me if i'm wrong... thanks...
02-13-2003, 08:42 PM
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Re: ... eagle rods... h-beam vs i-beam... (1.8T_EG)
I think an H-beam design will have a slightly lower mass moment of inertia since the mass is concentrated nearer the centerline of the rod. THis would make it better for high RPM. However for rod buckling which I imagine is the failure mode for high-high cylinder pressures (like in FI) the material should be concentrated away from the buckling axis. Most likely bucking/bending would occur about an axis parallel to the crank since in the other direction the end conditions are "fixed" ( ie not allowed to rotate).
02-13-2003, 09:55 PM
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Re: ... eagle rods... h-beam vs i-beam... (filetofit)
So basically H beam is good for your 10k rpm n/a motor, I beam is good for your 30psi terbod motor... unless I've got it wrong?
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