My91RSCamaro

Hey guys need quick bit of help, how much should I advance the timing with the aldl unpluged????? right now I have it set at 8*advanced and im running 100octane is that about right??? when I recinect the aldl it goes to about 12* BASE. Is that right??? thanks.

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Dewey316

Why are you running 100?

with that much octane, you may need to advance it that far, because the burn is so slow. If you do advance it 10-12*, as soon as you put anything short of 100 in, you should drop it back down.

ShiftyCapone

There is no need for 100 octane in your car. I would run 4° advance with 89 octane. You may even be able to get away with 87 with 2° advance.

Make sure you unplug the EST before you set the base.

Dewey316

pfff, 87 and 4* works well.

ShiftyCapone

Must be something in that Oregon gas I never could run 87 with 4° without some slight audible ping.

My91RSCamaro

The reason im running 100 is that I bracket race this car on wedsday nights. and it is wedsday. It runs smother and revs easier, and gets 1-2tehths quicker. Depending on the outside temp.

I was running a hypertech street runner chip. It would set the timing(computer controled) at 8*. Thats with 0*base with the EST unpluged. Now I have the stock chip back in, EST unpluged im at 8*, and with it pluged back in im at 12*

This is just a test anywho if I dont see any better numbers on tthe time slip im going back to the hypertech chip.

Fast355

I was running 10*and 91 octane on my 10.3:1 compression 350 TBI without any knock counts to speak of. That is what my engine liked the most.

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350 Vortec shortblock, balanced, blueprinted, 18cc dished pistons, total seal rings, ported 906 Vortecs, Edelbrock TPI Vortec base, Custom Reed Grind Hydraulic Roller Cam, Doug Thorley Tri-Ys, 2 1/2" exhaust, Stock TPI runners and plenum, stock 48mm TB, 24# LT1 injectors, AFPR @ 46 psi, 7730 ECM, DIY Tuning, stock 1,600 rpm stalled 700r4, 3.08 gears, P295/50/R17 tires.

Soon- 4L60E and 7427 TBI PCM in MPFI mode

azvolfan

I'm running 91 octane with 6* advance with no pinging.

90RS305

I'm running 4* advance with 91 octane and my car runs great

Dewey316

With the political status of this state, i'm suprised they are even allowed to sell gas anymore.

My91RSCamaro

the numbers dont lie my average 60foot was a 2.10 thats 2 tenths better than my usual average. and my mph went up by 1.7mph average. so the moral of the story is..... that hypertech chip sucks monkey $&%$^&%
My best 1/8 was a 10.128 after I get my 3.73 and slicks i should be hitting 2.0 or better on the 60, so i should be looking at low 15 or high 14 consistant.

Cadillac

Not much different south of you I'm afraid.

vic_V8

haven't set the timing on the car (in storage) since I got the timing light, but i set the truck at 6 and run 87

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91 RS, fully loaded, LO3 A4, t-tops, red leather, many bolt ons
2000 zx9r, 9 sec 1/4