Can you post ANY relevant information on this, or is this more "Lightweight Pulleys are the debil" hearsay?

And by relevant, I mean at least two VQ37VHR's with lightweight pulleys and oil pump failures at 'Normal' RPMs (ie, not revved to 9K where they blew up... revved to 7500-8000 where they blew up).

It's just my opinion. Connecting the dots more or less. ;) From some things that I have read. Seen first hand. Experienced myself. Like breaking a forged crankshaft in a Chevy LT1 I had some years ago. Having some friends who broke the oil pumps on their Hemi's.

Ding ding ding!!!

Those were most likely externally balanced. 99.99999% of new cars are internally balanced.
I have the Stillen pulley and I LOVE IT, great bang for the buck!

Normal or under drive?

20% UD, OEM size is a bit useless IMO

One of my favorite mods, won't say MOST because its not a huge gainer, but I took it off to take to the dealership, and the difference is night and day
Revs so much nicer with it

I have a brand new one that I couldn't install on my first Maxima, and now that my pops has a Maxima, I'm gonna install it on his without telling him, lol

the somebody else is probably me,
Yeah I blew the oem oil pump last year, in the very beginning we thought about the oil pump was the problem but after review of the event and datalog.
The verdict was the engine got oil starvation for half of a second which did a lot of damage to one of the VVEL head.

I limped back home then 200kms later the oil pump blew in thousand pieces !

Why did the motor oil starve? How high were you revving that motor?

Time Attack, the rev limit was 8000 or 8050 .....

Use The Force
 

At the point where performance is key this is simple if you use The Force. I’ve had a couple 13B rotary RX-7 engines custom built for me which redlined at all but Formula One RPMs. The power curve was blown through in the blink of an eye and you were off the scale. Pegging was common w/ no rev limiter so who knows how high RPMs reached. Some of my buddies drove their 7s like a bat out of Hell till the apex seals came apart. I drove on instinct and shifted a nanosecond after I felt the power drop – which was something that can’t be charted or measured. It’s an animal thing.

Yep oil starve and crappy oil pump gear. I dry sumped my motor. Takes care of both issues.

I originally addressed oil starvation with AM performance oil pan.

Got a reply back from.onpoint dyno about the 370z crank on his 9,000 rpms 350z

Elijah Morris Yes in endurance racing the 370z crank can not withstand extended 8700+ RPM use. However, for how little we run this engine the OEM crank is fine for 9000rpm. We generally don't leave the engine alone for more than 20-30 hours of run time, so it's not of much concern to us. However, real endurance racing teams have since switched to a forged crank for extended use, and most significantly the durability to withstand some driver-error enduced over-revs to 10,000+ rpm."

Ah, an old Andre thread. He was so entertaining. :rofl2: His post history is quite a read.