Is high test really necessary?

Red__Zed · 12-04-2013, 11:42 AM

Not unless your Z is a 500ZX.

Rusty · 12-04-2013, 11:47 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, 11:50 AM

Quote:

Originally Posted by Rusty

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, 11:55 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, 11:59 AM

Quote:

Originally Posted by MadChemist

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, 12:05 PM

Quote:

Originally Posted by Red__Zed

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, 12:06 PM

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

Isamu · 12-04-2013, 12:17 PM

Quote:

Originally Posted by exsanity

My Z runs like a striped ape when I use JP8.

it can't run on JP8

try jp4

Gadgetech · 12-04-2013, 12:24 PM

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, 12:40 PM

Quote:

Originally Posted by Jordo!

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, 01:09 PM

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

XiP · 12-04-2013, 01:25 PM

This thread...

falconfixer · 12-04-2013, 03:07 PM

Engine go boom just like this thread.

DEpointfive0 · 12-04-2013, 04:22 PM

^^LOL @ XiP

Riptide67 · 12-04-2013, 04:25 PM

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

12-04-2013, 11:47 AM	#17 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,217 Drives: 2011 Nismo GM 6M Rep Power: 2684438	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. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

12-04-2013, 12:06 PM	#22 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	just use the right fuel or sell the car and get the right car for 87 UNKNOWN_370, TreeSemdyZee, onzedge and 3 others like this.

12-04-2013, 12:24 PM	#24 (permalink)
Gadgetech A True Z Fanatic Join Date: Oct 2013 Location: Cumming, Ga Posts: 1,559 Drives: The Short Bus Rep Power: 870	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. TreeSemdyZee likes this. __________________ Upstate Z Club

12-04-2013, 01:25 PM	#27 (permalink)
XiP A True Z Fanatic Join Date: Dec 2011 Location: no clipping Posts: 11,096 Drives: ↑ ↓ Rep Power: 534	This thread... 03g35coupe6mt, JARblue, gurneyeagle and 5 others like this. __________________ I <3 Frost!!!

12-04-2013, 04:22 PM	#29 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	^^LOL @ XiP __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

12-04-2013, 11:42 AM	#16 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	Not unless your Z is a 500ZX.

12-04-2013, 11:55 AM	#19 (permalink)
MadChemist Enthusiast Member Join Date: Sep 2012 Location: Florida Posts: 412 Drives: 2010 370ZR Rep Power: 13	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

12-04-2013, 01:09 PM	#26 (permalink)
damian_mb Base Member Join Date: Jul 2013 Location: MN Posts: 213 Drives: 12 370z / 13 WRX Rep Power: 12	If I can't afford premium gas, I don't buy a car that takes premium gas......

12-04-2013, 03:07 PM	#28 (permalink)
falconfixer Track Member Join Date: Feb 2012 Location: 10aC Posts: 978 Drives: Taco Rep Power: 76	Engine go boom just like this thread.

12-04-2013, 04:25 PM	#30 (permalink)
Riptide67 A True Z Fanatic Join Date: Jul 2013 Location: Oak Harbor, WA Age: 37 Posts: 1,610 Drives: 09 Nismo #0483 PW Rep Power: 69	My Z runs on eggnog. No knocking or pinging here. I do add rum for a nice boost though. __________________ 2009 Nismo 370Z and 1975 Datsun 280Z 2+2 - PNW_INC - Legacy_Ohana Follow me on Instagam @s3zero_z3four

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