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Old 08-22-2003, 06:27 PM   #1
SpeedShift
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Default can i run 87 octane if i switch maps with defogger?

gas prices are $2.10 a freakin gallon for premium right now!

map A is supposed to be "limp home" map, right? can i just stay in this map and run it normally under 87 octane? i would like to do this until the money hungry crooked oil companies reduce their rip-me-a-new-one gasoline prices!!
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Old 08-22-2003, 06:52 PM   #2
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What engine management are you using?
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Old 08-22-2003, 07:56 PM   #3
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tuned by ecutek with dual maps.

i also have delta dash.
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Old 08-22-2003, 09:23 PM   #4
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Just pay the damn $$. Is it worth the safety of your car?

Granted it may work, but what fun is Valet mode?!
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Old 08-23-2003, 12:34 AM   #5
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if i change, for example; ignition timing in delta dash, will it apply these changes to both maps, or only one of them? i fiddled with idle speed and it applies changes to both maps.
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Old 08-23-2003, 11:50 AM   #6
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suck it up!!!

I have a ECUTEK reflash and pay as much as $2.30 for CA crap gas here in CA.

If you must, switch to a non-premium brand, use lots of octane booster.
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Old 08-23-2003, 11:54 AM   #7
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nevAr!!!

it took only two weeks to have prices rise over 30 cents. so it gonna take another two weeks to have them come down again. this is the game that the oil industry is playing. FUNK DAT!

i am lowering boost in valet mode to practically zero and she is gonna swallow what i give her, 87 octane!!
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Old 08-23-2003, 11:53 PM   #8
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Kaboom
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Old 08-24-2003, 03:25 AM   #9
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Speedy, I hope you have nothing but the best of luck with your 87 octane.
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Old 08-25-2003, 01:24 AM   #10
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If you can afford a new car and you can afford to mod it, you can pay $2.10 a gallon. Performance isn't cheap, but if you cant hack the gas, find another hobby dude. Don't half-ass it with 87 octane, you'lll be knocking all over the place.
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Old 08-25-2003, 11:34 AM   #11
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my curiosity has gotten to me now. i will lower ignition learning to help any future knock. i will drive up to the gas station with basically an empty tank, then put about 3-5 gallons of 87 and see what she does. i think it will work and would view it as another "cool" feature of the car. i can be doing my daily work commute with previous gasoline prices
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Old 08-25-2003, 04:28 PM   #12
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Please don't keep calling the alternative map the "limp home mode." Limp home mode would mean 0 boost, engine running like crap, no RPM's over 4000 (or is it 3000?) Limp home = VERY BAD

The other map, maybe more correctly called the "valet map" seems to limit boost to around 5-7psi, and does not appear to have aggressive timing. I agree - no need to necessarily run crap gas. Just take 2 nights out of the month and stay in instead of eating out, and you'll pay for the increase in gas prices for the month. I just filled up Sunoco 94 and it was $2.04 /gallon. Freaked me out since it was $1.94 /gallon a few days ago. But hey, I work hard so I can afford to pay an additional $5.00 every week.
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Old 08-25-2003, 04:31 PM   #13
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so can valet mode run on 87 ok, cirrus?
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Old 08-25-2003, 05:01 PM   #14
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My guess is that any map can run in 87 so long as you stay out of boost

Seriously, I just think for the savings it ain't worth it. My guess is that, "no" in the regular valet map, you will knock with 87. It is not so super-conservative, and it still allows for a fair amount of boost (7psi on my car) so simply switching to the other map and running 87 will possibly keep you from blowing up your engine, but it certainly could cause some decent knocking when you're in boost. Unless you can figure out a way to make the engine think it's normally aspirated, then 87 is okay - the problem(s) arise when you feed crap gas to a turbocharged car. As soon as you boost, well, I'll quote milkman
Quote:
Kaboom
just my .02 - it's your car ultimately, so you have to make the final decision whether or not to listen to some windbag on an internet forum. If you absolutely had to, in a pinch, run on 89, then the car can handle it, but you're supposed to go very easy on it until you can get back to somewhere with 91+octane. I think 87 is pushing it.
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Old 08-25-2003, 05:12 PM   #15
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if delta dash can lower boost to zero then i will do it.
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Old 08-25-2003, 05:25 PM   #16
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Nothing can lower boost to zero. The minimum boost you can run is wastegate spring pressure which is about 7psi. Lower boost as much as possible and take timing advance way down and you may be ok on 87.

-- Ed
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Old 08-25-2003, 05:32 PM   #17
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Quote:
Lower boost as much as possible and take timing advance way down and you may be ok on 87.
valet mode is already at lowest boost possible. how low should i reduce iginition? how much ignition advance should i pull? how much ignition learning should i reduce, 90%?
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Old 08-25-2003, 05:40 PM   #18
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huh? My valet map lets me boost to 10psi. It actually comes on just as fast as my normal map but it just limits at 10psi.

Quote:
Originally posted by SpeedShift

valet mode is already at lowest boost possible. how low should i reduce iginition? how much ignition advance should i pull? how much ignition learning should i reduce, 90%?
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Old 08-25-2003, 05:41 PM   #19
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Quote:
huh? My valet map lets me boost to 10psi. It actually comes on just as fast as my normal map but it just limits at 10psi.
your valet map is different then. each tuner sets them differently. you can lower it with delta dash. mine was set to the lowest settings.
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Old 08-25-2003, 05:55 PM   #20
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If you're really set on running 87, I'd set boost to WG spring pressure and scale down ignition to 70%. I think you'll be safe running like this but listen for knock for a while anyway just to make sure.

-- Ed
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Old 08-25-2003, 05:59 PM   #21
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Quote:
I'd set boost to WG spring pressure
valet mode should already be at this level. but if not, then i can achieve this by reducing waste gate duty cycle by 100%?

Quote:
and scale down ignition to 70%
i take you mean scale down iginition learning by 70%.

and leave the other ignition setting alone? (forgot what ecutek calls it, iginition adjustment i think)
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Old 08-25-2003, 06:24 PM   #22
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Can you do a log with delta dash to find out if your knocking with 87 octane? IF you have good results I may want to try it as well.
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Old 08-25-2003, 06:27 PM   #23
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of course, i will log with delta dash and post the graphical logs in here.
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Old 08-25-2003, 08:05 PM   #24
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Quote:
Originally posted by SpeedShift

valet mode should already be at this level. but if not, then i can achieve this by reducing waste gate duty cycle by 100%?


i take you mean scale down iginition learning by 70%.

and leave the other ignition setting alone? (forgot what ecutek calls it, iginition adjustment i think)

Setting Duty Cycle Adjustment to 0% should give you wastegate spring pressure. For timing you should change the iginition learning parameter to 60-70%. This is just a guess so listen carefully for knock.

-- Ed
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Old 08-25-2003, 08:32 PM   #25
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Or...instead of doing all of this, just connect the output of the turbo right to the wastegate actuator. This will only allow you to run wastgate pressure. Once you start putting good gas back in, switch it back. It will take you 1 minute at the most and you could even do it while you fill your tank. No fiddling with DD, messing with your tuned maps. Just a possible low tech solution...
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