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Cross Fire Injection. Method of fuel delivery in the L82 motor. The 1984 is the only C4 to use the L82. This is the same engine used in the 1982 C3. ...
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pappyfreebird bs er truth
Senior Guru
1028 Posts
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2007/12/26 0:00



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i read in de innerweb plus i kin read wud say bout that fellas wahahaa..ok tech i r sarry bog.i r babbying a 97 c5 n have run 87-89 octane car doesnt seem to notice,,but this knock sensor retardin my timming is something i r curious bout i see why etc,,but heres de innerweb part ..will i really gain good feelin hp by resettin fuses to high octane trim level n then run 91-93 i will have me a faster car??? fuel i dont by itno but retardin timming on ol hogs i undarstand real well loose lil power to gain easy kickstarts etc..is it werth it on my 97 fellas..thanks paps
ps shes stock ceptin fer cut out air box front n corsica? muffs?
Posted on: 2016/3/19 19:45
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Ultraman Re: bs er truth
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Hey Pap.....long time no hear.......the owners manual recommends you use 91 octane fuel......it says you can use 87 if need be but you will have slightly less performance. My idea is only the best for baby....be it a C4 or 5 or 6....they are high performance cars and need to be fed high performance fuel.........especially now when the fuel is so cheap.

On my C6 they recommend using only Tier One fuels of which I use Shell V Power Nitro every chance I get because it helps keep the fuel level sensors clean so they work properly.......which is a C6 thing........

So quit being such a cheap ass and treat your baby to the high test fuel.....
Posted on: 2016/3/20 3:09
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Matatk Re: bs er truth
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If the manual recommends 91, I'd run that. You probably wouldn't notice a difference in slow, daily type traffic, but if you run 87 and it retards the timing under wide open throttle, you will lose power.
Posted on: 2016/3/20 4:08
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bogus Re: bs er truth
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San Pedro, CA
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On a C4 LT1, the loss of power was measurable - 25hp - when running 87, vs 91.
Posted on: 2016/6/2 1:16
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pappyfreebird Re: bs er truth
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on this question i been 89 fer most part,,but i hafta addmitt i think shes happier with 91 cant say same at 93 but 91 she do seem hotter ,,maybe my head but dont want no knock sensor correctin chit should hafta ping ain cool weather hear it er nawt so i stay 91 now as do feel lil meaner could be jus lighter wallet makes everythin lighter but hey ifn id loose fity lbs id prolly go fastar too
Posted on: 2016/10/14 12:12
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donhall Re: bs er truth
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May help (?). It is usually prudent to question authority:

"you won’t see a power or fuel efficiency increase by running high octane fuel in an engine that has been tuned and designed for Regular gas, nor will doing so perform any extra ‘cleaning’ inside the motor. On the flip side, running low octane fuel in an engine built for Premium can increase the risk of engine damage and will certainly impact that unit’s overall performance. The next time someone tries to pass these myths off on you, you can try explaining to them how octane ratings really work – or you can just smile and nod, pay for your gas and move on."

From this link: http://www.nicoclub.com/archives/gasoline-octane-myths.html
Posted on: 2016/10/14 13:39
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