3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Timing ?

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Old 08-24-2003, 08:20 PM
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Timing ?

I heard i slight gruble at higher RPM's which I know is the noise from the timing being a little off, I checked with a timing light and its set at 16 degrees, and on the car it says the setting is 6 degrees for the 305, but my car now has a 350, so is the stock timing the same for a 350 and 305?
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Old 08-24-2003, 08:25 PM
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You can advance it a bit, but I think the motor would still be happy with 7-8* initial timing
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Old 08-24-2003, 08:37 PM
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i think u read it wrong, right now the car is at 16 (Sixteen) degrees, and the stock setting is 6 (Six) degrees. so i should put it at 8 degrees? thanks
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Old 08-24-2003, 08:43 PM
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Originally posted by shwine617
i think u read it wrong, right now the car is at 16 (Sixteen) degrees, and the stock setting is 6 (Six) degrees. so i should put it at 8 degrees? thanks
No I didnt read it wrong I just didnt convey my thoughts well. you said your manual or whatever said to put the 305 at 6*. I ment you can advance it a little from that
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Old 08-24-2003, 09:07 PM
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ohh ok , sorry about that, thanks for the help
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Old 08-25-2003, 11:17 AM
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At 16 deg base, it should ping at higher rpms. Ask me how I know. How were you getting the timing? Please describe the process you used. Also tell which wire you used (driver side front wire, hopefully). Did you disconnect the advance?
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Old 08-25-2003, 11:01 PM
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I used a timing gun obviously, i set it on the drivers side closests to the front of the car, which is the number one cylinder, i did not unplug the timing advance, which i think is what is keeping the car's ping unoticable, where exactly do you unplug it from? yes it pings at higher rpms, where would you recommend setting the timing? i know it should be a little advanced stock, thanks!
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Old 08-26-2003, 08:58 AM
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To set the timing on a computer controlled car you have to disconnect the ESC (Electronic Spark Control) wire so that the computer doesn't play with your timing, you could be at base timing of 6, but the computer could be cranking it up to 16. I would recommend setting the timing at 10 or 12 degrees base, and see if it pings at all, if it does turn it down 2 degrees and go from there. The more timing you can run (to the point of pinging) the more power you are going to make generally.

Martin
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Old 08-26-2003, 09:55 AM
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There is a tan single wire by the passenger strut tower that comes off a harness. There is a connector on that wire. Disconnect the wire at the connector and take the timing after that. If you need to, I'll try get you a pic. I would go 6 deg which is stock. I never saw the need to advance the timing as when you do, you will be doing it across the board and not just at the point you want it to. I prefer to have it done via the EPROM.
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Old 08-26-2003, 06:15 PM
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My l98 loved 12 degrees for some crazy reason.Any higher and it pinged an lower felt like a pig.
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Old 08-26-2003, 10:44 PM
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Originally posted by 82355
To set the timing on a computer controlled car you have to disconnect the ESC (Electronic Spark Control) wire so that the computer doesn't play with your timing, you could be at base timing of 6, but the computer could be cranking it up to 16. I would recommend setting the timing at 10 or 12 degrees base, and see if it pings at all, if it does turn it down 2 degrees and go from there. The more timing you can run (to the point of pinging) the more power you are going to make generally.

Martin
I agree with 82355 as far as your timeing goes,you might end up going just a tad higher than 12 because of you cam. But ten or twelve is a good starting point either way.

T.
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Old 08-26-2003, 10:46 PM
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ok i will start at 12, but i am not exactly sure where the wire is
i will look for the brown one though, thanks
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Old 08-26-2003, 10:53 PM
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Originally posted by shwine617
ok i will start at 12, but i am not exactly sure where the wire is
i will look for the brown one though, thanks
Look by the heater box,brown wire with what looks like a fuse holder,can't miss it.
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Old 08-26-2003, 10:53 PM
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You remember that you have a knock sensor in your car right? It will retard the timing when it hears pinging. Pinging occures before you hear it but accumulated effects are not good. If you are insistant on going 12, I would say you need a scantool to see if it is pinging. That or a standalone knock sensor so you can see pinging.
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Old 08-27-2003, 11:37 AM
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Alkim,
I am not sure what ur trying to say..I have a brand new knock sensor, or should i unplug that to when doing the timing?
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