Racing fuel in a Z

cab83_750 · 12-01-2009, 03:01 AM

A station here is selling racing fuel. Say you 'accidentally' filled her up with racing fuel, what would happen?

AK370Z · 12-01-2009, 03:21 AM

This will happen

http://www.youtube.com/watch?v=FAQ5mRq9kes

CBRich · 12-01-2009, 08:28 AM

Knock Sensors FTW.

kannibul · 12-01-2009, 09:08 AM

Personally, I wouldn't "accidently" put anything other than 91-93 octane in my Z.

Anything above that is a waste, anything below that risks the engine.

CBRich · 12-01-2009, 09:13 AM

Clearly anything above is not a waste as shown by the video above.

Chan Chee Hoe · 12-01-2009, 09:21 AM

Shell claimed their V-power that sell worldwide is 99% same as the ones put into the Ferrari F-1 team...

kannibul · 12-01-2009, 09:34 AM

Quote:

Originally Posted by Chan Chee Hoe

Shell claimed their V-power that sell worldwide is 99% same as the ones put into the Ferrari F-1 team...

1% can be a huge difference with fuel.

imag · 12-01-2009, 10:03 AM

As the video shows, some amount of high octane is not a waste in this car - the timing adjusts and you get some of the benefit. I definitely notice the difference when I put in a few gallons at the track (of course, our maximum normally available octane here is 91).

I'm not saying to fill the tank with 107, but mixing in some 107 can have noticeable affect. My guess is the max usable octane is about 96 or so, at which point you stop getting any benefit with the stock motor.

ianthegreat · 12-01-2009, 10:06 AM

My buddy and I go to the strip a lot. He drives the 370z. If anything you are advancing the timing due to the octane - it wouldn't hurt.

We basically coast our cars on empty then fill w/ around 3-4 gallons on VP109 (101 octane). BIG improvement.

Your ECU needs time to adapt. A couple WOT pulls should be good.

lovethe370z · 12-01-2009, 10:11 AM

The engine's VVEL is pure awesomeness

kannibul · 12-01-2009, 12:36 PM

Quote:

Originally Posted by imag

As the video shows, some amount of high octane is not a waste in this car - the timing adjusts and you get some of the benefit. I definitely notice the difference when I put in a few gallons at the track (of course, our maximum normally available octane here is 91).

I'm not saying to fill the tank with 107, but mixing in some 107 can have noticeable affect. My guess is the max usable octane is about 96 or so, at which point you stop getting any benefit with the stock motor.

As the video indicates, it's oxygenated fuel. Leans it way out and make it burn hotter.

ChrisSlicks · 12-01-2009, 12:39 PM

Quote:

Originally Posted by kannibul

As the video indicates, it's oxygenated fuel. Leans it way out and make it burn hotter.

It's not the octane, it's the oxygen content. If you tried the same experiment with high-octane non-oxygenated fuel you would not gain any power, you might actually lose power.

kannibul · 12-01-2009, 12:40 PM

Quote:

Originally Posted by ianthegreat

My buddy and I go to the strip a lot. He drives the 370z. If anything you are advancing the timing due to the octane - it wouldn't hurt.

We basically coast our cars on empty then fill w/ around 3-4 gallons on VP109 (101 octane). BIG improvement.

Your ECU needs time to adapt. A couple WOT pulls should be good.

Placebo

Do a few drag runs with 91, then do a few with 101.

ChrisSlicks · 12-01-2009, 12:45 PM

Quote:

Originally Posted by ianthegreat

My buddy and I go to the strip a lot. He drives the 370z. If anything you are advancing the timing due to the octane - it wouldn't hurt.

We basically coast our cars on empty then fill w/ around 3-4 gallons on VP109 (101 octane). BIG improvement.

Your ECU needs time to adapt. A couple WOT pulls should be good.

VP109 is oxygenated and is 105 octane (R+M/2). Given that you can't advance the timing or increase compression most of the gain will be from the oxygen content.

kannibul · 12-01-2009, 12:47 PM

Quote:

Originally Posted by ChrisSlicks

It's not the octane, it's the oxygen content. If you tried the same experiment with high-octane non-oxygenated fuel you would not gain any power, you might actually lose power.

It's amazing how much octane is thrown around as a way to increase HP.

The car is designed to run on 91. Running less than that trips the knock sensors to retard timing. It won't advance timing due to higher octane - in fact, the car won't even "know" that it's running on higher octane, it simply knows that the knock sensors aren't tripping.

12-01-2009, 03:01 AM	#1 (permalink)
cab83_750 Track Member Join Date: Apr 2009 Location: CA Posts: 887 Drives: 09 NISSAN 370Z Rep Power: 417	Racing fuel in a Z A station here is selling racing fuel. Say you 'accidentally' filled her up with racing fuel, what would happen?

12-01-2009, 03:21 AM	#2 (permalink)
AK370Z Administrator Join Date: Sep 2008 Location: NJ Posts: 9,930 Drives: 09 370Z MB Sports M6 Rep Power: 10	This will happen http://www.youtube.com/watch?v=FAQ5mRq9kes __________________ The370Z Signature Pictures ll Want to rock our forum decals on your car? Then click here! ll How to Embed YouTube Videos In a Post STOP! (Hammertime) ll Become a Premium Member Click HERE ll F.A.Q. Are You a Nissan Dealer? Click Here to Become A "Supporting Dealer" and Start Listing Your 370Zs In Our Inventory Section My Monterey Blue Z ll My Exhaust --> My Intake --> G3 Nissan's Official Response Regarding Oil Temp Issue: CLICK HERE Need a Set of Cheap Winter wheels /Tires? Then Visit The Banner Link Below and Place Your Order. You'll Help Keep The370Z Alive.

12-01-2009, 10:03 AM	#8 (permalink)
imag Enthusiast Member Join Date: Mar 2009 Location: Oakland, CA Posts: 446 Drives: up the wall Rep Power: 16	As the video shows, some amount of high octane is not a waste in this car - the timing adjusts and you get some of the benefit. I definitely notice the difference when I put in a few gallons at the track (of course, our maximum normally available octane here is 91). I'm not saying to fill the tank with 107, but mixing in some 107 can have noticeable affect. My guess is the max usable octane is about 96 or so, at which point you stop getting any benefit with the stock motor. __________________ Stillen CBE, Stillen track cooler, Stillen Gen3 Intakes, B&M short shift kit

12-01-2009, 10:06 AM	#9 (permalink)
ianthegreat Base Member Join Date: Mar 2009 Location: TEXAS Posts: 171 Drives: 08 335i, 86 Ranger Rep Power: 16	My buddy and I go to the strip a lot. He drives the 370z. If anything you are advancing the timing due to the octane - it wouldn't hurt. We basically coast our cars on empty then fill w/ around 3-4 gallons on VP109 (101 octane). BIG improvement. Your ECU needs time to adapt. A couple WOT pulls should be good. __________________ JB4 - Helix FMIC - Forge Diverter Valves - UR CAI - RR Downpipes - Bastuck Exhaust - Devils Own Stage 2 Meth Kit - Fully Catless - 423whp 489wtq Last edited by ianthegreat; 12-01-2009 at 10:20 AM.

12-01-2009, 10:11 AM	#10 (permalink)
lovethe370z Base Member Join Date: Sep 2009 Location: MARYLAND Posts: 182 Drives: 2010 370z Coupe Rep Power: 16	The engine's VVEL is pure awesomeness __________________ 2010 370z Coupe Touring, Sport, Nav 6MT Red/Black

12-01-2009, 08:28 AM	#3 (permalink)
CBRich A True Z Fanatic Join Date: Apr 2009 Location: SC Posts: 2,464 Drives: 370Z Rep Power: 544	Knock Sensors FTW.

12-01-2009, 09:08 AM	#4 (permalink)
kannibul A True Z Fanatic Join Date: Jun 2009 Location: Jenks, OK Posts: 2,281 Drives: 370z Touring/Sport Rep Power: 267	Personally, I wouldn't "accidently" put anything other than 91-93 octane in my Z. Anything above that is a waste, anything below that risks the engine.

12-01-2009, 09:13 AM	#5 (permalink)
CBRich A True Z Fanatic Join Date: Apr 2009 Location: SC Posts: 2,464 Drives: 370Z Rep Power: 544	Clearly anything above is not a waste as shown by the video above.

12-01-2009, 09:21 AM	#6 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	Shell claimed their V-power that sell worldwide is 99% same as the ones put into the Ferrari F-1 team...

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