Raising The Redline On The Z

zer099

I'm not looking for trade secrets but generalized information without ambiguity or apparent speculation is more helpful to the community I would imagine. Helping a common guy plan a build is often vastly different then a race team trying to get their car ready for a season. The whole point of this forum, I thought, was for the common enthusiasts to share information and grow. I know more vetted members can get frustrated with what may seem like ridiculous new blood questions but it's sharing information like what was learned from race teams and from our own experience that can help everyone grow; at least that's my thoughts and experience from being apart of these types of forums over the years.

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2009 G37X | 326 AWHP | 264 AWTQ

Spooler

The search function is your friend. Use it and spend hours reading old threads. The data is out there.

zer099

You're presuming no search was done. Search "broken crankshaft" and you get six returns, none about breaking a crank. One from 2016 where a guy directly asks about the limits of breaking the crankshaft and the one reply he gets is more focused on HP and a slight guess at RPMs. Try "broken crank" and you get about two pages, but only one useful thread (in regards to the question), sans this thread that now shows up in that inquiry. And that one thread doesn't actually state why, how, conditions, or anything of the like; just that a when they retired an engine it typically had a broken crank, and their rev limit was 8750. Same goes for "valve float". I spent the better part of my time searching these boars and the internet before commenting in this thread. The original question in this thread was about 8000. The necro-revival of this thread was about similar, and in either cases I found it doubtful it was about season tracking the car and living its life in the 8000+ range. To enter the conversation and tell people they need to worry about there crank can seem absurd. We have no evidence you need to worry about your crank in the low 8000s with the type of use the engine is most likely going to see. Valve float, maybe. Rod bolts? According to a reputable shop it is an issue. Oil pump, for sure, we all should know that (though dry sump is not the only answer or the correct one depending on the engine's use).

The data is not always out there sometimes. Sometimes you have to wear on people's nerves to get information that they themselves might think is out there.

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2009 G37X | 326 AWHP | 264 AWTQ

Elmo370z

Food for thought. Fund the frontier my friend. Sign up for tracks day beat the crap out of it for a season if it last, tear down the motor inspect every part, document it. Rebuild it and see what part fails again. Like others have stated mostly race teams have gone this route. Most people don’t want to fund the R&D. If you watch grid life static 370z has a 8k redline, at the end of the season ask him how his motor held up, curious if he will tear down the motor to inspect any failures starting to arise or will he just run it until it blows up or when it blows up will he take the time to inspect everything and share his experience or like most will he just junk the motor.

Spooler

It is really simple. Lay your money on the table and take your chances. Then you can see what breaks. If you want the experience and proof you have to PAY for it. Either by someone else's knowledge or your own actual experience. I don't think we have that to worry about though, you aren't going to do anything.

Rusty

What it comes down to is this with stock crank and 8K redline with a N/A motor.

DD, canyon play toy. Where you might see 8K maybe once a week. It will live.

Doing track days a couple times a year. It will live. But the number of track days you do increases. The life shortens.

Track toy. You are on borrowed time.

FI is a different story.

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Elmo370z

So true.

JARblue

So the biggest problem you're encountering is the guys that are doing this kind of crazy work to the Z are still very few and very far between out of a very small total number of Z owners to begin with. Plus not all of them are even on this forum. Some of them were active at one time or another but they weren't posting extreme details on their build mainly because they were busy af and also they understand that there are very few people interested in the extreme cost of these builds.

A lot of the available information that has been presented comes directly from race teams, not common enthusiasts. Gotta have results to avoid speculation, and there just aren't that many out there. So you have to take a few people at their word based on their experience

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