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I haven't used the Precision rods. Anyone who has, can you tell me if they really use a 5/16" rod bolt in them? surely not. Maybe if they were an L19 or Carr bolt it may be a different story. I know some scat ones used to on the SR20 and 3S toyota rods but even they have 3/8" bolts now. Thats a lot of load on a little bolt! Spool and most others run a 3/8" bolt.

they are the rods in my engine (which you put together) you did comment on them being a different bolt but i dont remember which model bolt you said they were.

The oil squirter in the factory rod isn't there to oil the pin, it's to oil the thrust side of the bore. It will squirt a fair bit of oil around but again, you're relying on splash or mist rather than a jet of oil to the pin. If your rods have the grooves in them I wouldn't worry about doing anything else, it will oil the pins and do some piston cooling.

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