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-   -   redline/peak H.P/ & H.P curve-When to shift?? :) intresting??? (http://www.the370z.com/track-autocross-drifting-dragstrip/76043-redline-peak-h-p-h-p-curve-when-shift-intresting.html)

Megan370z 09-06-2013 07:51 AM

Quote:

Originally Posted by Chuck33079 (Post 2474820)
There's at least two guys that lost their motors from oil pump failure running a 8k rpm redline. Z Eliminator and somebody else. Sam at Gtm also strongly advised against a higher than stock redline. The internals of the oil pump come apart at that speed. There's a Nismo unit with hardened internals, but its pricey.

Most people don't take theirs to the track. That's where failures occur. How often is someone at 8k rpm on the street?

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 !

Chuck33079 09-06-2013 08:09 AM

Quote:

Originally Posted by Megan370z (Post 2475288)
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?

Megan370z 09-06-2013 08:41 AM

Quote:

Originally Posted by Chuck33079 (Post 2475301)
Why did the motor oil starve? How high were you revving that motor?

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

venus 09-06-2013 08:31 PM

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.

Shamu 09-07-2013 07:14 AM

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.

Elmo370z 03-09-2016 03:23 PM

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."

Chuck33079 03-09-2016 03:36 PM

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


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