RCZ's 370Z Journal.

wstar · 05-14-2009, 12:54 PM

I wouldn't expect it to without a tune. The MAS/MAF whatever in the intakes and the A/F meters in the headers can retune for a lot of things, but I don't think they're capable of retuning themselves for higher octane. I would suspect all it does it buy you extra insurance against knock/detonation.

MightyBobo · 05-14-2009, 12:55 PM

Quote:

Originally Posted by wstar

I wouldn't expect it to without a tune. The MAS/MAF whatever in the intakes and the A/F meters in the headers can retune for a lot of things, but I don't think they're capable of retuning themselves for higher octane. I would suspect all it does it buy you extra insurance against knock/detonation.

x2

Dont forget the wonderful race gas smell, too...mmmmmmm...

ChrisSlicks · 05-14-2009, 01:59 PM

Quote:

Originally Posted by MightyBobo

Dont forget the wonderful race gas smell, too...mmmmmmm...

LOL, maybe he was just enjoying getting high on the fumes

I was also under the impression that the car only "detuned" for low octane to prevent knock. If it can up-tune as well that would be really cool.

wstar · 05-14-2009, 03:00 PM

I think the issue there is that the car doesn't have any way to 'sense' the increased octane to account for it. It can sense too little octane, but only the hard/indirect way, by noticing knock and backing off to eliminate it.

Hence the need for a different flash/tune to take advantage of race gas. One of the things I like about the UpRev stuff I was reading is that they can store up to 5 maps in your reflash and you can switch them via the cruise control buttons without reflashing again. You can have an easy-going map for light driving and/or questionable fuel, an all-out on 93 pump gas map, a 108 race gas map, a valet map, etc.

semtex · 05-14-2009, 03:08 PM

Quote:

Originally Posted by wstar

One of the things I like about the UpRev stuff I was reading is that they can store up to 5 maps in your reflash and you can switch them via the cruise control buttons without reflashing again. You can have an easy-going map for light driving and/or questionable fuel, an all-out on 93 pump gas map, a 108 race gas map, a valet map, etc.

Really? You sure you're not thinking of Cobb? It'd be cool if UpRev can do this.

wstar · 05-14-2009, 03:13 PM

Quote:

Originally Posted by semtex

Really? You sure you're not thinking of Cobb? It'd be cool if UpRev can do this.

IIRC, Cobb's switching uses their handheld unit and takes a little while (not long though). UpRev's reflashed ROM has all the maps preloaded, it just moves a little pointer when you use the cruise control switches, pretty much instant.

You can read about UpRev Osiris feature-list here: Osiris - Tuner - Osiris - Default Store View

Edit: Link to Osiris User Manual: http://uprev.com/documentation/Osiri...Guide%20V2.pdf

Edit again, paste from the above manual:

Quote:

4. Using the UpRev map switching feature
4.1. Once an ECU has been reflashed with Osiris it will have the added functionality to switch
maps from the cruse control buttons.
4.2. Map switching happens in real time. You do NOT need to shut down the engine.
4.3. To switch maps, hold down the “Set” toggle.
4.4. While holding the “Set” toggle, press the “Cancel” button once for map 1, twice for map 2,
three times for map 3, etc…
4.5. Release the “Set” toggle.
4.6. The green cruse “Set” light will flash confirmation pulses, once for map 1, twice for map 2,
etc…

NOTE: Although map switching happens in real time, even with the engine running, for safety
reasons it is highly recommended that map switching only be used when the vehicle is at
a complete stop.

05-14-2009, 12:54 PM	#1 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	I wouldn't expect it to without a tune. The MAS/MAF whatever in the intakes and the A/F meters in the headers can retune for a lot of things, but I don't think they're capable of retuning themselves for higher octane. I would suspect all it does it buy you extra insurance against knock/detonation. __________________ 7AT Track Car! Journal thread / Car setup details

05-14-2009, 03:00 PM	#4 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	I think the issue there is that the car doesn't have any way to 'sense' the increased octane to account for it. It can sense too little octane, but only the hard/indirect way, by noticing knock and backing off to eliminate it. Hence the need for a different flash/tune to take advantage of race gas. One of the things I like about the UpRev stuff I was reading is that they can store up to 5 maps in your reflash and you can switch them via the cruise control buttons without reflashing again. You can have an easy-going map for light driving and/or questionable fuel, an all-out on 93 pump gas map, a 108 race gas map, a valet map, etc. __________________ 7AT Track Car! Journal thread / Car setup details

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