Tomei H-Beam Forged Connecting Rod For 4G63 Engine

H-Beam Profile
Usually, to give con-rod buckling strength and light weight character at the same time, H-beam or I-beam profile is applied. And the choice of the profile is depending on its purpose, use environment, production cost and quantity. We applied H-beam profile for the connecting rod of NISSAN RB, SR, CA, VG engine and succeeded in gaining high buckling strength while reducing the weight.

Forging Process
We produced con-rod's forging mold with a main bearing hole in its large end, so as to the 'metal flow' runs along con-rod's entire body. And with a use of special material, we succeeded in producing con-rod with extreme intensity and durability.
High durable con-rod, which is designed and made with special forging mold can keep its original shape from distortion even at the high RPM that more than 1 ton of pressure concerns.
Metal flow; which is also known as 'fiber flow', indicates the strength of the metal and is said to hold two times more strength than regular steel without it. Moreover, direction of the metal flow has to be controlled when giving it certain strength.

Structure of Small End
To provide lubrication oil to the bush in small end, instead of sending oil through the long hole inside the rod from the large end, we assembled tapered oil hole at the top of the small end so that the oil will drip during piston