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Rb30 Block Modifications

hpt_simon
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datsqik Enthusiast

datsqik

Posted
Posted

You can order Pauter rods with a centre oil hole to the wrist pin.

It seems like a bit of a problem with dry sump setups starving the little end of oil. They reckon you should run 10-12hg vacuum as anymore tends to starve the little end. I have seen a couple of rb's with the rod bush on its way out but these were using the thin wall pins that come with the CP pistons. I reckon these pins flex quite a bit as the bushes in these rods were only spreading out on the edges of the rods with at least 50% of the centre of the bush still having the hone marks. There was no evidence of detonation in these engines, nothing in the combustion chamber or on the pistons or the plugs, the pistons skirts were good which is usually a dead give away with heavy detonation, bigend bearings were good on both sides.

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Fitzpatrick Speed Works Mentor

Fitzpatrick Speed Works

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I fit custom wrist pins to my motors, there is an american pin that fits only needs shortening, I am sure some of you will work out what it is. I am so pleased to see someone else out there concurs on the cp wrist pins, arias arent as good of a piston design but their pins are certainly alot better.

On topic, on a dry sump or external pump builds, I have filled the oil gallery that normally feeds the turbo and got the oil from a tee in the line somewhere else. I have seen many rb26 even N1 blocks crack the line between cylinders just under that high pressure oil hole.

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