2.0 litre Con Rods

[chris_seven]

New design for 2.0 litre con rods

[Olivier]

And, will they be billet or forged?

Olivier.

PS: Email sent....

[jdj123]

Hi Chris,

what average weight ( including ARP bolts & nuts)are you planning

JD.

[chris_seven]

Olivier,

Machined from a forged blank.

JD - 570g without bots - from 3D model and 630g with bolts.

[2.5MFI]

Chris, Looks like it should be a strong rod but a little heavy compared to the stock 2.0 rod @ around 620g, and Pauter 2.0 rod @ 520g.

[304065]

Chris, does the 650g include the bearing shells? My stock rods, by no means the lightest (or heaviest) weight class, came in with a mean around 600g without bearing shells.

[chris_seven]

Weight of a rod is an interesting debate and H Beams are never going to be the lightest rod for a given design but they are strong in terms of twist and fatigue life.

Fistly let me say that I didn't type the weight with bolts correctly - Bolts are 30g each so weight with bolts is around 630. This may be a bit high as we have not allowed for the slightly lower density of the small end bush.

I think that the weight of this rod is about the same as a Carillo.

Looking at the basic weight groups the standard rods seem to weigh in at 560 for rod code 21 and 660 for Code 32.

I am not sure how well these rods perform at 8000 rpm in terms of life but I have seen many debates about early race engines needing 2.2S rods.

The weight groups of 2.2 S rods seem to vary between 700g for weight group 21 and 770g for weight group 32.

I am sure someone will comment about the reliability of the early rod.

I think that the Pauter design will always be lighter than an H beam and an I beam is also likely to be lighter.

The design philosphy of the rod seems to be the main issue

[motogman]

I think I understand the H and I design but what is a Pauter?

[2.5MFI]

Pauter builds an updated version of the old X beam rod design. It has a rib up the broadside of the beam.

[redrobin911]

HI will you be able to machine grooves to act as squirters at the main bearing end to allow cooling of the underside of the piston? Any ballpark price for rods??