-assuming this is your car and engine-
You mean you don't remember the 'Great Con Rod' debatedeath by boost... Sounds like the new block is going to be a beast!! Quick question... Why is an I beam rod better than an H? Just curious for my own knowledge...
My new engine is being built I beam rods also...
You mean you don't remember the 'Great Con Rod' debate
between Matt / GP Tuning and I...lol
I will find the info and post it.
But that is exactly how an H-Beam con rod breaks
most of the time.
The only place the H-Beam is stronger, is up around
the wrist pin area.
If George had just completed adding more ignition advance, and
I am correct in surmising the 'Quench and Squish Velocity'
issues, then this 'Might?' have caused the con rod to break.
More later when I have time. . . .
Ooooohhhhh Noooooo, not again..lolI have a broken Ultra I beam that met an unfortunate fate in an LSX 388.... Nothing is immune to failure
ACKTUALLY!!I never really thought this would happen again, but here we go. . . .
-Some posts from sometime back regarding this subject-
A connecting rod works in two domains:
1) Tension Loading
2) Compression Loading
A connecting rod’s max tension loads are determined by the mass of the parts involved, the rod length, the stroke length, and the max rpm.. . . Nothing More!
the max tension loads will never change, no matter what ‘Power Adder’ you add to your engine.
That max tension loading occurs at TDC on the exhaust stroke.
This has nothing what so ever to do with the amount of HP being made.
You got to be 'Crazy Nuts' to do what we all do with our rides..The only real argument I have heard for H beams before (vs I beam) is lower cost and lighter rotating mass.
Lighter mass seems like it would only really make a big difference in high rpm applications but if you look at the Honda S2000 F20C OEM rod it is an I beam...and it ties the Ferrari 458 for highest redline in a production engine!
I have definitely seen a lot of broken H beams and bent I beams (and more rarely broken I beams but usually doing something crazy).
Yes, but. . .ACKTUALLY!!
Consider a turbo motor that makes 40 psi of backpressure. Cylinder pressure never drops to zero while the exhaust valve is open. 40 psi of backpressure on a 4" bore is 502 lbf.