340 Connecting Rod Question

[Moparturbo]

Hello

I have included a picture of my connecting rod. I have not seen this stamping before. Would this be the foundry stamp? I am talking about the stamp next to the Chrysler Pentastar
Thanks

 

[CRUZE 418]

Chrysler Pentastar isn't it?

 

[Professor Fate]

Triangles? I guess it's a matter of perspective, but that's a Pentastar.

 

[Moparturbo]

Triangles? I guess it's a matter of perspective, but that's a Pentastar.

Why yes it is. Not sure why I didn't pick up on that.

 

[Garrett Ellison]

Give us a close up of the stamp in the right side of the picture, please...

 

[Moparturbo]

Give us a close up of the stamp in the right side of the picture, please...

Pic attached Thanks

 

[MoparMike1974]

Doesnt look like a stock 340 rod to me, or maybe I never noticed that weird pentastar. Im going to throw out a guess and say maybe a DC or MP part.

 

[Garrett Ellison]

I'm with MoparMike here. Mopar Performance rod made by a sub-contractor back probably in the 2000's. Could be either 5140 or 4340 material.

 

[RustyRatRod]

@Bighead440 might can add something here.

 

[Locomotion]

I'm with MoparMike here. Mopar Performance rod made by a sub-contractor back probably in the 2000's. Could be either 5140 or 4340 material.

The "aftermarket" Mopar Performance rods were made from 4340 steel. There was the standard/HD 340 based version & a "lightweight" 273 based forging. I did have some of the lightweight rods and they had "Mopar" cast into one side of the beam. But there may have been more than one vendor during their run and I never knowingly saw a standard/HD version. I have pics but can't access them from work. Then there was the earlier, very heavy "Hemi-footprint" rod which had it's own forging design.

 

[Garrett Ellison]

The "aftermarket" Mopar Performance rods were made from 4340 steel. There was the standard/HD 340 based version & a "lightweight" 273 based forging. I did have some of the lightweight rods and they had "Mopar" cast into one side of the beam. But there may have been more than one vendor during their run and I never knowingly saw a standard/HD version. I have pics but can't access them from work. Then there was the earlier, very heavy "Hemi-footprint" rod which had it's own forging design.

Thanks! I'd seen somewhere before (maybe the engine manual or the old white book?) that the 4340 performance rods and cranks were outsourced and the "in house" veresions were 5140.