Oil ways into ARP rods

[europeanme]

I will investigate this some more and if it's possible, get it done through work...
its the not knowing the cross section of the rod to see if there is anything un-toward stopping this from getting done...

[europeanme]

No, the oil does not pass through the crank to the mains the oil comes from the mains from the main bearing oil feed in the block, the hole in the crank main journal passes oil through the crank to the hole in the big end journal to feed the big end bearing and then through the hole in your con rod to the little end (if you have a hole).

so to an idiot, me, it is flowing away from the crank, to the ends and back to the sump
/next zone needing lubrication...

[Error404]

it is possible on the generic H-beam rods, I've seen it done on 1.8T 144mm rods

[driftin jo]

so to an idiot, me, it is flowing away from the crank, to the ends and back to the sump
/next zone needing lubrication...

not away from the crank through it.
See pics.

[Error404]

These guys offer it as an option on their rods:

http://www.intengineering.com/Integrated-Engineering-p8917373-1-2.html

[Jamo]

It's an option during production, I've never seen pre produced rods riffle drilled. Be interesting if you can find a company that does it though

[pasbogdan]

I am not clear about 1 thing(i do not remember).Is the pin moving in the piston too or only in the rod(standard rod).

[andy10v]

I know this is a massive over simplification but why cant you remove the cap, clamp the rod and just drill a hole right through?

I also agree audi would not have wasted money if it was not necessary, or at least strongly question why they put it there. However 100k on rods without it shows it will do 100k on that engine

[andy10v]

I am not clear about 1 thing(i do not remember).Is the pin moving in the piston too or only in the rod(standard rod).

It is held in the piston by clips so it can rotate.

[AndyP]

I'm sure I know a company in Sheffield that will be able to do this. If somebody could confirm the size of the hole I'll take a rod in and see what sort of cost we'd be looking at

[europeanme]

well have a look at a standard rod tomorrow and use audi's R & D and copy their sizes...

[Error404]

looks about 1mm or thereabouts.

[Tonks4x4]

I wonder if they got rid of it on performance rods to lower the chances of a loss of oil pressure?

And i would imagine to drill the blank rods they would have to be micrometer perfect as it would make a difference to the balance I the rod.

Also the jet from the oil squirters will be a constant 4 to 5 bar pressure jet washing the underside of the piston, I am 100% sure that would be adequate enough.

[pasbogdan]

It is held in the piston by clips so it can rotate.

So,with aftermarket rod pin is hold fixed in the rod(not needing oil) and rotating in the piston?

[Error404]

no the pin isn't press fitted into the rods, it is free to rotate