RB26 bottom end rebuild q's rods/pistons

[Roy]

Ok, so if the std GTR rods can handle enough power for a certain application, is there any weight advantage to be had from using say Eagle rods?

By the time you buy rod bolts, clean up the std rod, the leap to an Eagle rod isnt that great...so whats the drawback? Is it definitely as strong as the std rod, is it heavier?

[proengines]

It's a fair difference, I just weighed a standard rod at 637.5g and an Eagle rod at 495.3g. A 142.2 gram weight saving is fairly impressive! If you want end to end weights let me know and I'll measure one up.

Edited February 26, 2006 by proengines

[Roy]

End to end Weight

LOL...what does that tell us? Based on the weight difference, then that just about makes up my mind.

BAsed on what i found on the weight of the pistons, forgies seem heavier then std, so will help compensate i suppose.

[proengines]

End to end Weight

LOL...what does that tell us? Based on the weight difference, then that just about makes up my mind.

BAsed on what i found on the weight of the pistons, forgies seem heavier then std, so will help compensate i suppose.

It's the way you balance the rods, they hang on a roller bearing mandrel, one end on the scales and one off. So you get all the little ends the same weight and then all the big ends the same weight. it's because the little end of the rod reciprocates and the big end rotates with the crank. It's more critical on V engines as you use percentages of each to work out the weight of the bobweight you use when balancing the crank.

None of that is probably relevant, but if the little end if heaps lighter it's like having a lighter piston in there, so the actual weight that is changing direction at tdc and bdc is less.

[Roy]

Ah, check.Ill bark that at the next person i talk to, it may convince them i know what im on about

[CruiseLiner]

my forged jun cosworth pistons were heaps lighter in weight than the stock rb26 cast ones.