Nissan 370Z Forum

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-   Nissan 370Z General Discussions (http://www.the370z.com/nissan-370z-general-discussions/)
-   -   Is high test really necessary? (http://www.the370z.com/nissan-370z-general-discussions/82978-high-test-really-necessary.html)

Red__Zed 12-04-2013 10:42 AM

Not unless your Z is a 500ZX.

Rusty 12-04-2013 10:47 AM

Nobody say this yet. The motor has 11 to 1 compression ratio. That's high for a street motor. Also the combustion chamber design in the head has alot to do with it too.

Red__Zed 12-04-2013 10:50 AM

Quote:

Originally Posted by Rusty (Post 2594266)
Nobody say this yet. The motor has 11 to 1 compression ratio. That's high for a street motor.

Has less to do with it than you might think. The car just isn't designed to accommodate for low octane. There are plenty of 11:1 cars that run 87 just fine.

MadChemist 12-04-2013 10:55 AM

The 370z just like the 350z are designed with a part called a knock sensor. The whole purpose of this part is to detect knock if it occurs and then will compensate by adding more fuel to the chamber to prevent further knock from happening. Knock can occur due to the fuel not having enough octane. Running 87 octane will decrease your hp but that is all it will do.

Nissan 370Z Knock Sensor - Nissan OEM Engine Mechanical

What does a knock sensor do? - Yahoo Answers

Chuck33079 12-04-2013 10:59 AM

Quote:

Originally Posted by MadChemist (Post 2594292)
The 370z just like the 350z are designed with a part called a knock sensor. The whole purpose of this part is to detect knock if it occurs and then will compensate by adding more fuel to the chamber to prevent further knock from happening. Knock can occur due to the fuel not having enough octane. Running 87 octane will decrease your hp but that is all it will do.

Nissan 370Z Knock Sensor - Nissan OEM Engine Mechanical

What does a knock sensor do? - Yahoo Answers

The motor has to be knocking before it can be detected and the motor pulls back timing. Knocking is bad. Also, the car can only add so much fuel to compensate.

Rusty 12-04-2013 11:05 AM

Quote:

Originally Posted by Red__Zed (Post 2594279)
Has less to do with it than you might think. The car just isn't designed to accommodate for low octane. There are plenty of 11:1 cars that run 87 just fine.

I know. ;) Just brought that out if the OP didn't know. Alot more goes in to it. Timing, valve lift, valve duration, valve overlap, A/F, etc. ;)

kenchan 12-04-2013 11:06 AM

just use the right fuel or sell the car and get the right car for 87

Isamu 12-04-2013 11:17 AM

Quote:

Originally Posted by exsanity (Post 2594238)
My Z runs like a striped ape when I use JP8. :happydance:

:bowrofl::bowrofl::bowrofl: :gtfo2: it can't run on JP8




try jp4

Gadgetech 12-04-2013 11:24 AM

I think it's interesting how in some parts of the country 91 is the highest you have. We have 93 readily availible and some of the cheap stations run 92.

Sh0velMan 12-04-2013 11:40 AM

Quote:

Originally Posted by Jordo! (Post 2594118)
The engine is tuned from the factory to run on an octane (AKI) of 91 or higher.

...

AKI < 91 is not recommended.

To be fair, at higher altitudes, like over 7k feet, 89 octane is likely plenty.

damian_mb 12-04-2013 12:09 PM

If I can't afford premium gas, I don't buy a car that takes premium gas......

XiP 12-04-2013 12:25 PM

This thread...

http://www.gifsforum.com/images/gif/...a7baf3-337.gif


http://i3.asn.im/Meme-suicide-_t147.gif

falconfixer 12-04-2013 02:07 PM

Engine go boom just like this thread.

DEpointfive0 12-04-2013 03:22 PM

^^LOL @ XiP

Riptide67 12-04-2013 03:25 PM

My Z runs on eggnog. No knocking or pinging here. I do add rum for a nice boost though.


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