Why not to build a Z32 (Page 2 of 2)

Infinity, how large is the line from your oil pressure gauge to the engine? On our Z we used a -4an line which, in my past experiences, greatly increases the response time of the gauge. The small 1/8" copper or plastic lines will not show you accurate results, and the electric gauges do not respond quick enough either.

The #23 300ZX lost a head gasket just before the 10th hour. We also had an oil line blow off at the same time, not 100% sure if they were related, but it sure is an odd coincidence. People cheering as we were being towed off of the track was pretty lame in my opinion. Yeah we were quick, but we would never cheer when another racer had problems!

Replace that plastic line with -4an (you will need a fitting for the back of the gauge and one to attach the -4an line to the oil pressure source). Your problem is being masked by the small line. While it may or may not be a fatal issue, it is certainly shortening the life of the engine.

We had the engine apart to put rod bearings in it. We disassembled the entire thing to just to clean it up and look things over. It has headers, 2 into one 2.5" mandrel bent exhaust, and a custom air intake that I fabbed up as well. It also has some really noisy lifters! We concentrated on weight reduction and trying to make the suspension/brakes work as best as possible with the parts that we had.

I would love to see or obtain a set of stock 300zx NA exhaust manifolds , the j30 ones are tiny.