914-4 2L #3 rod bearing failure Options

[Driver174]

Rod bearings 1,2 & 4 look good, but #3 not so good. This engine has approximately ten race weekends sense it was rebuilt. Has anyone seen this issue?

[brant]

I would add that you need air flow under the car to benefit or assist in pulling the hot air out of the cooler when you go down

I used to run the really low rubber lip spoiler on the front
found that by using a less deep front spoiler (LE style) I could improve cooling.

so if your car is really low or has a front splitter... try letting more air run under the car by removing the front spoiler and that can also help with oil cooling.

[stownsen914]

250 is a bit hot. You can easily drop the temp by making sure you have proper ducting to and from the cooler. Make sure the air that enters your duct to the cooler has no where to go except through the cooler. Don't leave gaps or openings - the air will go there instead of through your cooler. Foam weather stripping works well to take up the gaps. Also, the opening in your bumper can be the size of the cooler or even a little smaller. It may be tempting to make it larger, but that won't work - it will just prevent air from going in.

On the air exit, through the hood is a good way. Wheel wells can also work if you don't want to cut the hood. Make sure the exit is at least as large as the cooler. A little larger is better.

Another thing - hopefully you used -10 or -12 oil lines. I've seen -8 used, but that's a bit too small and could restrict oil flow.