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I'm guessing it did, which is why he's sad that it's about to run out.

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Old 05-14-2009, 01:53 PM   #151 (permalink)
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I'm guessing it did, which is why he's sad that it's about to run out.
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Old 05-14-2009, 01:54 PM   #152 (permalink)
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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.
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Old 05-14-2009, 01:55 PM   #153 (permalink)
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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...
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Old 05-14-2009, 02:59 PM   #154 (permalink)
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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.
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Old 05-14-2009, 04:00 PM   #155 (permalink)
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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.
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Old 05-14-2009, 04:08 PM   #156 (permalink)
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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.
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Old 05-14-2009, 04:13 PM   #157 (permalink)
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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.
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Old 05-14-2009, 04:18 PM   #158 (permalink)
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Cool! Looks like you have to buy your own license though. I'm going to be spending $800 to have my car dyno tuned with UpRev as it is. If Sharif (Forged Performance) can upload additional maps, cool. But if he can't, I don't think I'll be spending another $900 for this ability.
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Old 05-14-2009, 04:19 PM   #159 (permalink)
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Cool! Looks like you have to buy your own license though. I'm going to be spending $800 to have my car dyno tuned with UpRev as it is. If Sharif (Forged Performance) can upload additional maps, cool. But if he can't, I don't think I'll be spending another $900 for this ability.
All of the Osiris versions support map switching. I don't know what the licensing details are on tuners using the feature of course.
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Old 05-14-2009, 04:43 PM   #160 (permalink)
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well, the point of using race gas is to just have an additional margin of safety at the track. When the car is flat out for 20 minutes in 100 degree weather reaching high temps... that's when it is most prone to knocking. Racegas on an otherwise stock tune is just an additional line of defense. If you guys track the cars, its nice to at least mix some 5 gallons or so of 108 octane gas into your 93. You will end up with about 98 octane and thats pretty good for the car...


Also about the osiris..I used to have a UTEC on my sti and you could literally just switch a little remote dial with numbers on it to switch maps. The osiris system looks pretty cool too, I am going to have that... definitely going to have a track tune, a race gas tune for the track, valet and everyday.

Also...my brake light is turning on whenever I put the clutch in during hard acceleration....like when the cars weight shifts back...almost as though brake fluid is sloshing around, maybe in the reservoir?

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Old 05-14-2009, 05:21 PM   #161 (permalink)
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Old 05-14-2009, 05:27 PM   #162 (permalink)
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R888's nice.

I was going to go with those but I got a real cheap set of Nitto NT01's which should be just as good.
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Old 05-14-2009, 05:29 PM   #163 (permalink)
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Also...my brake light is turning on whenever I put the clutch in during hard acceleration....like when the cars weight shifts back...almost as though brake fluid is sloshing around, maybe in the reservoir?
That's a possibility. Might want to top it off almost to the top, I did on mine.
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Old 05-14-2009, 06:01 PM   #164 (permalink)
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Also...my brake light is turning on whenever I put the clutch in during hard acceleration....like when the cars weight shifts back...almost as though brake fluid is sloshing around, maybe in the reservoir?
Umm...how do you know this? I mean, it's not like you can see your brake lights while you're driving/accelerating, right?
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Old 05-14-2009, 06:15 PM   #165 (permalink)
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Umm...how do you know this? I mean, it's not like you can see your brake lights while you're driving/accelerating, right?
He's talking about the BRAKE light that's on the dash that illuminates when either the parking brake is clicked on or the brake fluid is low.
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