Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Nissan 370Z General Discussions (http://www.the370z.com/nissan-370z-general-discussions/)
-   -   93 octane worth it? (http://www.the370z.com/nissan-370z-general-discussions/13876-93-octane-worth.html)

1slow370 01-30-2010 10:39 AM
Quote:
Originally Posted by MightyBobo (Post 381291)
Look up JP-5 specifically :)
ok but only cuz you didn't tear me a new hole about how it is clearly superior just cuz it says aviation grade or AVSMO;)

2theextreme 01-30-2010 10:42 AM
Quote:
Originally Posted by MightyBobo (Post 381256)
I'll stick with my JP-5. You know what JP-5 is used in, right? Its exclusive! "High" rollers, only!
http://pix.motivatedphotos.com/2008/...000-rollin.jpg

:icon17:

1slow370 01-30-2010 11:01 AM
ok so it's carrier grade high flashpoint kerosine turbine fuel. It's still a heavy oil do you ever have injector fouling problems? run anything with it like a can of seafoam to prevent that, and do you use it regularly or track only. I'm interested because kerosine does have a higher specific energy and it may offer a power boost but i would be worried about fouling. The motor is 11-1 so i wouldn't be to worried about getting it to run though.

MightyBobo 01-30-2010 12:05 PM
Its used for this, specifically:

http://www.jamesshuggins.com/i/u-2a/misc/u-2_beale.jpg

Get it? "HIGH" ROLLERS?! Harrrrrrrr

j.arnaldo 01-30-2010 12:06 PM
From 87 to 93, definitely!; from 91 to 93...?

KillerBee370 01-30-2010 06:04 PM
Quote:
Originally Posted by ZzzZz (Post 380702)
Fill up my Z with 91 or 93 but don't let me know.

$1000 says I can tell you the difference.
:bs:

kenchan 01-30-2010 08:56 PM
93 is all we get around here for super unleaded... So that's what I use in my Z.

The BlueMax 01-30-2010 09:01 PM
Still Investigating
 
I'm only on my second tank and I put 89 octane in it because some guy who worked as a fuel delivery driver told me that there wasn't really any difference in the plus vs. premium, but some difference in 87 standard. I don't think I have noticed anything yet, but the car's pcm would take the timming down to compensate. You don't notice it as much in a GM LT1 350 V8 as much as you will in the Nissan 3.7 V6. I'm still experimenting.:tiphat::driving:

1slow370 01-30-2010 09:03 PM
there are noticeable differences between fuels but usually only if you are comparing a good premium to a lesser grade fuel even of the same octane. It's more about the gas than it is the octane number.

as for the JP-5 apparently it is the naval standard for at sea operations so every plane on an aircraft carrier uses it

MightyBobo 01-30-2010 09:17 PM
Makes sense - its high flashpoint is crucial to...oh, I dont know...not killing the crew if it ignites, and its extremely low freezing point is crucial to the U2's ability to fly extremely high without its fuel freezing.

ChrisSlicks 01-30-2010 09:49 PM
Quote:
Originally Posted by bluemax (Post 382297)
I'm only on my second tank and I put 89 octane in it because some guy who worked as a fuel delivery driver told me that there wasn't really any difference in the plus vs. premium, but some difference in 87 standard. I don't think I have noticed anything yet, but the car's pcm would take the timming down to compensate. You don't notice it as much in a GM LT1 350 V8 as much as you will in the Nissan 3.7 V6. I'm still experimenting.:tiphat::driving:
89 is not recommended for continuous use given the high compression ratio that the 370 uses. Your fuel guy was correct in terms of additives, but you need a minimum of 91 to keep this engine happy. All my American cars are built for 87 so that's what I use.

1slow370 01-31-2010 02:00 AM
Quote:
Originally Posted by ChrisSlicks (Post 382338)
89 is not recommended for continuous use given the high compression ratio that the 370 uses. Your fuel guy was correct in terms of additives, but you need a minimum of 91 to keep this engine happy. All my American cars are built for 87 so that's what I use.
True that use what it says on the cap when in doubt.

ZzzZz 02-01-2010 08:48 PM
Quote:
Originally Posted by Modshack (Post 381301)
Well.......That's not entirely true. With today's adaptive ECU's, the knock sensor will allow the advance of timing up to the point of detonation then back off slightly for maximum power and efficiencies. Higher octane allows more timing to be advanced with a result in slightly more performance. Cooler Intake temps also allow this advance. I've posted numerous charts and graphs on this in the past so I'll spare you that. The 370 ECU has proven to be very adaptive which is one reason it responds so well to mods without re-tuning and will respond to higher octanes as well, at least up to the max adjustment range within the ECU programming. . As an example from the Audi camp, the difference between a 93 octane program and a 100 octane program on a 1.8T motor is roughly 15-20 hp. The differences between the programs are are primarily timing advances...
Finally... a man who understands! :tiphat:


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