LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Can our cars be tuned to run 87 octane safely?

Old May 24, 2004 | 07:02 PM
  #16  
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Try filling up in Giddings, TX. I paid $1.98 for 93 octane yesterday. I never thought i would be happy to pay $2 for a F*CKING gallon of gas.

I found a place in Austin that sells for $2.00, but cant find it any cheaper w/o goin to crap stations.
Old May 24, 2004 | 07:15 PM
  #17  
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If you are too cheap to put premium in it, sell it. Whats the point of having a performance car if you don't use it for that. Go out and buy a hybrid of something.
Old May 24, 2004 | 07:16 PM
  #18  
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Re: Re: Re: Re: Can our cars be tuned to run 87 octane safely?

Originally posted by warwickbass
-_-

Anyway, OPEC controls the oil prices. Bitch at OPEC not Congress. Leave Alaska alone, dumbass. It will be worth it one day. Let the Arabs use all THEIR oil up THEN the world will be looking to US in the future. Although, we may not be alive at that point, but whatever. Living in Houston does have it's benefits. 93 Octane = $2.09
Ok mods, since this isn't what I was trying to accompolish and the question is not being answered. Please lock this thread or I'll delete it soon. Sorry for the lounge type content.

Anyone want to give a stab at the question and shut the hell up about the ricer wanna be crap?
Old May 24, 2004 | 07:20 PM
  #19  
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to answer your question if you get pinging then have the timming lowerd a little. just a couple degrees should do it.

and only lower the timming in the rpm range you hear the ping. our cars are high comp. but due to the heads being cooled first we can get away with lower octane fuel.
Old May 24, 2004 | 07:23 PM
  #20  
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I think you can definately run on 89 octane. You can probably run 87 octane if get alot of the timing adjusted out of the PCM. The LT1's have rather agressive tuning.

You could also get a cam setup with a lower dynamic CR.
Old May 24, 2004 | 07:26 PM
  #21  
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Originally posted by speed_demon24
If you are too cheap to put premium in it, sell it. Whats the point of having a performance car if you don't use it for that. Go out and buy a hybrid of something.
If you're too idiotic to post relevant information, go to another message board or something....
Old May 24, 2004 | 07:28 PM
  #22  
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So whats the concensus. If I upload my stock tune again. I should be able to run say 89 octane? Pull a little timing if it pings and thats that?
Old May 24, 2004 | 07:41 PM
  #23  
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Gas isn't going to be this ****ing high forever.
Old May 24, 2004 | 07:54 PM
  #24  
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thats about it. you shouldnt have a problem with 87 unless your timming is way advanced. it took a little playing but i turned my timming up until it pinged, then backed off until it quit. and did it all through the rpm range, and different driving styles. easy, hard whatever.

what happens is you are trying to run the engine backwards when it pings. lower octane burns quicker then higher octane so it calls for less timming. becouse the higher octane burns slower you add timming to start the burn sooner so its igniting at the time the piston starts its trip down. you put 87 in it burns quicker so when it ignites it detonates sooner, so the piston is still traviling up in the cylinder tries to push it down when its going up, creates heat and pounds the bearings, and eventually burns holes in pistons.

lower the timming until you dont hear any pinging and youll be good. if your worried pull a couple more degrees out to be safe, but as long as you dont get the predetonation or ping i wouldnt be concerned. if your stock dont be scared to run the stock tune becouse although our cars run better on higher octane they are designed to be ran safe with 87.
Old May 24, 2004 | 07:58 PM
  #25  
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Sure its going to be high, & I agree with scoobysnax83, its a$$holes that tell you to buy a new car that should have to pay for higher gas prices if they so want to kiss a$$ & be patriotic & $hit. It pisses me off when people around here side with the government, they are dumba$$es, I too think like scoobysnax83, a few month back everyone around here was doing the same crap, they would live in the moment & agree with the government to add 2 3.5cent levys, & 1 9.5 cent levy for transit onto our gas saying its ok & its all for the better. Well F*CK them & hope they fry in HELL, thats 95% of this F*CKED UP province, NEU NEU NEU its ok, yeah well its ok to pay $1.15 a litre because of their stupidity & their levys, all because they lived the moment & didn't think in future terms, now that crued oil sky rocketed I bet it would be nice to have those 15 cents off per litre right now. at 1.15 cents a litre for premium its impossible to drive my car. People around here don't think that there are people in this world that are just trying to get by with our lousy pay checks & still have fun, they don't! & you wonder why I sometimes get so pissed off at the government.

I don't know about your guy's political system but ours blows, in the last 2 month we had 15% wage cut for all medical staff & all the government had to say is (we need to get out of debt) & everyone went along, we had a price hike in everything in stores, even ice cream went up by 30% or so, our gas sky rocketed, we had 3 levys on gas come in, now they are trying to take away our health care system.

You tell a nimrod around here this & he'll say " hey its all for the best" & just repeat what they heard our PRIMINISTER say on TV.

Pisses me off.

Sorry had to vent cuz yet again I spent $70 Canadian which is $51US to fill up my car, & with my mods I only get 220 miles out of the tank IF I'M LUCKY & drive like a grandma, well if you look at my sig I DON"T DRIVE LIKE A GRANDMA, I didn't spend thousands of dollars in mods to have to replace them in a few years & never of had fun with them, like replace my clutch cuz its too old instead of replacing it cuz its fried, that kinda stuff hurts.
Old May 24, 2004 | 08:42 PM
  #26  
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Should be able to tune it for 87 no problem. A week and a half ago I put down some decent numbers on the dyno with pcmforless 87 octane programming in my Caprice. Granted you have a bit more compression but I have iron heads, that should wash out in the end. I initially just had him make me an 87 octane tune for winter driving figuring I can't hook anyway so why pay for permuim fuel if I can't make use of the power I have. The drop in power was very minor and with gas prices going up I just left that programming in.
Old May 24, 2004 | 08:53 PM
  #27  
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thanks guys, now we're accompolishing something... I still may find something as a beater until they figure out what to do about these prices. Every little bit does count.

I feel bad for the people living in Canada (bunker) You all have a good system going up there, but one that costs everyone quite a bit. Free health care and the cleanest streets I have ever seen, seems to have been weighted back on the resident consumers. Good Luck man
Old May 24, 2004 | 09:17 PM
  #28  
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I've been running 87 since day 1 and haven't had a single problem. No knocking, pinging, power lose, etc. What I am going to do is on every 4th fill up is run 93, and 87 every other time. I don't care what people think about me running 87, runs perfect for me and I'm paying less so I'm happy.
Old May 25, 2004 | 01:48 AM
  #29  
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I belive when I baught my car the first owner ran 87 octane, dunno if he ran perfect, you can't tell pinging with these cars cuz your knock sensor pulls timing slowing you down though.
Old May 25, 2004 | 01:59 AM
  #30  
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Originally posted by disco192
Try filling up in Giddings, TX. I paid $1.98 for 93 octane yesterday. I never thought i would be happy to pay $2 for a F*CKING gallon of gas.

I found a place in Austin that sells for $2.00, but cant find it any cheaper w/o goin to crap stations.
I found a crap station today in Sealy, tx(40 min west of houston) selling premium for $1.93. I wouldnt risk it though.

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