Quote:
Originally Posted by NIZMOZ
I have been part of the other 350z site since early 2004 and no one had these problems with heat build up or diffs failing. I race my car in 100+ degree heat here and it doesn't have a issue period.
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If no one in the 350Z world really experiences diff failure then either, their hot lap sessions are shorter than 30 minutes and/or they are slow or running an open diff or they are street racing.
All SCCA T2 350Z's have to run diff coolers and they are about the equivalent of a bolt on modded street car power wise with well developed suspension. Same thing with Grand Am Cup 350's which are lightly modded and run on DOT tires as well.
Many street 350Z's driven by good drivers have had their diff's fail when the session was longer than 30 minutes, usually by bearing failure and the diff locking up. In the 350Z racing community, it is common knowledge that you have to run a diff cooler.
In testing I have cataloged diff temps and we usually have to stop right past 30 minutes of track time as the diff temp is starting to go above 300 degrees. The M-Workz 350Z didn't have a diff cooler but we had to run partial sessions in it until we installed one.
There is plenty of empirical evidence proving the 350Z diff fails due to overheating. The thing about forms is the signal to noise ratios are really poor unless some of the smarter guys are active. In most mature forums, they tend not to be.
Getting into arguments like this one discourages people who really know what they are talking about from contributing.