difference between rb25/26 rods?

[bumblebtuna]

So i bought a RB26 crankshaft and rods and the rods are IDENTICAL to what came in my Neo RB25. No one has been able to tell me 100% that the Neo's came with 26 rods or not. People have said they're 50% thicker than the 25 rods but if that's the case and the neo's didn't come with 26 rods i got ripped off.

question:

i know they're the same length, but how can you differentiate between the two as they're identical in length; demensions.

could you weigh them to see if there's a difference in weight because of the properties? i can give part numbers off the rod itself if you need them. someone has to know

thx
Modified by bumblebtuna at 7:11 PM 10/28/2007

[eh?]

Yes Neo RB25 and RB26 rods are the same with the same p/n.R33 Rb25det rods are thinner with a different p/n.

[bumblebtuna]

cool, well anyone want a set of rb26 rods? i have 2 sets..

shoot me an offer..i'll post it in classifieds

[eh?]

Can you post up a pic of the neo rod next to a RB26 rod?

[bumblebtuna]

the rod i bought is on the left..my neo rod is the right one

sry for ****ty picture camera phone

left rod part number : 24-4 05U41-1

my neo rod prt # : 39-0 05U41-1

[bumblebtuna]

lol, i just looked at the rodbolt and they're ARP's

sweet

[eh?]

here's a pic of stock r33 rb25 rods. Notice how much thicker the R34 rb25 and rb26 rods are at the neck area

[boostin1234]

lol, i just looked at the rodbolt and they're ARP's

sweet

Ha

I totally forgot about the ARP rod bolts, you got a better deal than we both thought then.

[bumblebtuna]

chad, thx man..i spent over $100 (car/gas/and more gas) to get there though..lol

i really just didn't want to ship the crank, i used to work for fedex and didn't wanna risk it.. i saw it was shipped from cali though

[bumblebtuna]

here's a pic of stock r33 rb25 rods. Notice how much thicker the R34 rb25 and rb26 rods are at the neck area

i can't really tell a difference, but i searched sau and found some posts about the part #, and mine match

just curious, what number do you have

*edit* meh, i guess i can tell a difference.. they do look a little fatter in general.
Modified by bumblebtuna at 8:33 PM 10/28/2007

[Darius]

The RB26 rods are noticeably thicker down by the large end.

[John Bristot]

So you can use 26 rods in a 25? Do you need 26 pistons to work with the 26 rods to put in the 25 block? I just want to make sure. Thanks!

[Coolwhip]

25 and 26 rods are the same length and can use the same bearing. If you are using them in your RB25 you'll use RB25 pistons.

Rule of thumb:

RB25 crank - use RB25 pistonsRB26 crank - use RB26 pistons

Either setup, RB26 Rods can be used.

[bumblebtuna]

^^ true story