Raising The Redline On The Z

AlWakRa

Currently I have my limiter at 7700rpm as per Seb, I hit it a few times in track, as I reach the braking point, didn't face any issues until now, I think I read vvel is limiting the revs to 8k.

But the issue, vvel generates a lot of heat, so better to stay less.

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Elmo370z

No one has solved valve float issues once you get to 8k and beyond.

zer099

I'm not asking this to piss in anyone cereal, but to have the information and understanding: Has anyone actually confirmed valve float above 8000RPMs or are we just still speculating? Speculation is fine, and safe, but I just spent the better half of an hour searching these forums and could not find a confirmed case of valve float (and to be fair, I could have missed it), but the best I found was everyone discussing it may be an issue, but no one every reving that high long enough to confirm it is an issue.

Again, not trying to start anything, I am just curious if we are still in theories stage about things or if we have some documented evidence.

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2009 G37X | 326 AWHP | 264 AWTQ

Elmo370z

Yup yup. Not posted on these forum, couples shop have proven this. I been in private talks about this issue. Daelen care to chime in

zer099

Good information. Would be nice to know the situations, data, and the like. Our stock intake springs are stout little guys (~199lb @ 12.8mm). Compared to the exhaust side which is almost half that rate (~120lb @ 10.2mm), its surprising the exhaust side isn't floating first. Even the springs with the JWT cam kit is ~136lb @ 12.5mm lift.

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2009 G37X | 326 AWHP | 264 AWTQ

Rusty

Darlen is no longer with MAM.

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

Rusty

I have my redline set at 8,000. My shift light at 7,500. I shift at 7,500. The only time I hit 8,000 is at the end of the straight to save an up shift, down shift condition.

__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

Elmo370z

A company is Canada is working on a solution to sustain high revs without running into valve floats issues. Unlike some companies we won’t be calling out, they aren’t going to put out anything until significant R&D has been done to back there claims. If it doesn’t work or they don’t go through with you probably never hear about it, if it does work I’m sure it will be blasted all across this forum. Keep in mind this is a small company so it may be a while, but 2019 should be a interesting year.