redtop91 wrote:Question: A friend of mine boosted his Z and he had a really huge problem with the OEM bearings. Apparently after the teardown, he found that the OEM bearings in his Z weren't Tri Metal, but rather some weird alloy that changed state when high temp oil hit it and really weakened the bearings permanently. I've never heard of this problem before. Don't older Nissans use the lead based F770? If so is an aftermarket bearing really necessary?
I actually have never really dablled with Z cars, namely because there aren't many in the area, nor people that I know that own them...I wish thoughm, as a Z32 is one of my favorite cars of all time
As far as OEM bearings in the SR, that is what I swear by, unless you're looking at doing the main cap oil modification (mazworx), where they prefer to use the multidrilled ACL (iirc) bearings. Clevite ones may work, but if you're building the bottom end for some revs, a slight bit 'looser' than normal is the ticket...which you can do with the OEM bearings
SideWays=smiles wrote:It helps regulate the oil temperature which takes a load off the cooling system, it also prevents oil breakdown do to overheated oil, though this is not as big of a problem with todays synthetic oils. I would consider an oil cooler cheap insurance, especially if you plan on running an oil cooled turbo. One thing to remember when installing an oil cooler, always use an oil thermostat to avoid overcooling the oil. My 2 cents.
For those not doing track duty, a better alternative may be a greddy oil pan instead. The extra capacity and cooling fins should do a good job of keeping a street car happy...
BUT any real track car and or drift car should certainly use the oil cooler setup. Between bearing life extension, cam lubircation, and generally 'happier' oil, it's something that just makes sense.
FWIW: I will be installing one over the winter on my car, LONG overdue....