85 L98 timing info needed
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Le Mans Master
Joined: May 2004
Posts: 5,866
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From: Hellinois
Finalist 2020 C4 of the Year - Modified
85 L98 timing info needed
Could someone please let me know what my 85 L98 timing is supposed to be set at? Also, does anybody know where I can get the emissions information sticker that goes on the radiator shroud? Mine is missing and that's where the timing info is located. Even my Helms says to "check the sticker" This sticker has been discontinued since 1993 and I've already tried Eckler's, MAM, Corvette Central, Zip, and the Paddock. Surely somebody reproduces these. If I am totally out of luck could someone copy the info and email it to me? Thanks in advance.
Race Director
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Originally Posted by Midnight 85
Could someone please let me know what my 85 L98 timing is supposed to be set at? Also, does anybody know where I can get the emissions information sticker that goes on the radiator shroud? Mine is missing and that's where the timing info is located. Even my Helms says to "check the sticker" This sticker has been discontinued since 1993 and I've already tried Eckler's, MAM, Corvette Central, Zip, and the Paddock. Surely somebody reproduces these. If I am totally out of luck could someone copy the info and email it to me? Thanks in advance.
I think factory is 6 deg BFTDC
Someone will be along in a minute to comment
Jack
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
6 degrees Before Top Dead Center (BTDC) is the stock spec.
That's checked with the engine idling and the EST wire disconnected.
That wire should be a black wire with a tan stripe located near the power brake boost. Somewhere under the booster between the booster and the block.
After reconnecting the EST (DISCONNECT AND RE-CONNECT THE EST WIRE WITH ENGINE AND THE IGNITION KEY "OFF"), you'll need to disconnect the battery for about 20 seconds to clear the error code that gets set when the computer detects the engine running with the EST disconnected.
Can't help with finding a sticker.
Jake
Hope this helps.
That's checked with the engine idling and the EST wire disconnected.
That wire should be a black wire with a tan stripe located near the power brake boost. Somewhere under the booster between the booster and the block.
After reconnecting the EST (DISCONNECT AND RE-CONNECT THE EST WIRE WITH ENGINE AND THE IGNITION KEY "OFF"), you'll need to disconnect the battery for about 20 seconds to clear the error code that gets set when the computer detects the engine running with the EST disconnected.
Can't help with finding a sticker.
Jake
Hope this helps.
Le Mans Master
Joined: Jun 2002
Posts: 6,097
Likes: 0
From: High Plains Drifter Fayetteville, AR
Originally Posted by JAKE
6 degrees Before Top Dead Center (BTDC) is the stock spec.
That's checked with the engine idling and the EST wire disconnected.
That wire should be a black wire with a tan stripe located near the power brake boost. Somewhere under the booster between the booster and the block.
After reconnecting the EST (DISCONNECT AND RE-CONNECT THE EST WIRE WITH ENGINE AND THE IGNITION KEY "OFF"), you'll need to disconnect the battery for about 20 seconds to clear the error code that gets set when the computer detects the engine running with the EST disconnected.
Can't help with finding a sticker.
Jake
Hope this helps.
That's checked with the engine idling and the EST wire disconnected.
That wire should be a black wire with a tan stripe located near the power brake boost. Somewhere under the booster between the booster and the block.
After reconnecting the EST (DISCONNECT AND RE-CONNECT THE EST WIRE WITH ENGINE AND THE IGNITION KEY "OFF"), you'll need to disconnect the battery for about 20 seconds to clear the error code that gets set when the computer detects the engine running with the EST disconnected.
Can't help with finding a sticker.
Jake
Hope this helps.
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
Originally Posted by TIMSPEED
What's the purpose of 0º?
I disconnected the knock sensor and did not want to run regular timing until I am comfortable with it. I'll eventually bump it back up to 6*
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Thanks to all who replied, I can't believe somebody isn't reproducing these, they've been discontinued since 1993 according to the dealership.
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Melting Slicks
Joined: Oct 2000
Posts: 3,426
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From: Heidelberg PA
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Originally Posted by Midnight 85
Thanks to all who replied, I can't believe somebody isn't reproducing these, they've been discontinued since 1993 according to the dealership.
Good Luck.
Last edited by 85vet; Jan 27, 2005 at 11:56 AM.
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Corvette Parts Online just responded to my note to them about availability, this sticker is going to be reproduced somewhere around the end of the year.
