redline/peak H.P/ & H.P curve-When to shift?? :) intresting???

Megan370z · 09-06-2013, 08:51 AM

Quote:

Originally Posted by Chuck33079

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, 09:09 AM

Quote:

Originally Posted by Megan370z

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, 09:41 AM

Quote:

Originally Posted by Chuck33079

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, 09:31 PM

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, 08:14 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, 04:23 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, 04:36 PM

Ah, an old Andre thread. He was so entertaining.

His post history is quite a read.

09-06-2013, 09:31 PM	#49 (permalink)
venus Base Member Join Date: Jul 2013 Location: usa Posts: 105 Drives: Datsun 240Z Rep Power: 12	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. __________________ Finesse is everything.

09-07-2013, 08:14 AM	#50 (permalink)
Shamu A True Z Fanatic Join Date: Jan 2011 Location: Nor Cal Posts: 1,059 Drives: 370Z Racecar Rep Power: 19	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. __________________ Grant

03-09-2016, 04:36 PM	#52 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	Ah, an old Andre thread. He was so entertaining. His post history is quite a read. 2011 Nismo#91 likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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03-09-2016, 04:23 PM	#51 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	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."