would 2 degrees on timing make that much difference?
Race Director
Joined: Sep 2003
Posts: 16,838
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From: Database Error Indiana
Should the timing advance after the connector is re-connected?
My timing with the connector unhooked is 6 btdc and after I reconnect the connector it advances to 8* after top dead center.
Plus the smoke is burning my eyes....does that mean it's running rich??
Please help
My timing with the connector unhooked is 6 btdc and after I reconnect the connector it advances to 8* after top dead center.
Plus the smoke is burning my eyes....does that mean it's running rich??
Please help
Le Mans Master
Joined: Jul 2005
Posts: 5,752
Likes: 4
From: Austin Texas
Should the timing advance after the connector is re-connected?
My timing with the connector unhooked is 6 btdc and after I reconnect the connector it advances to 8* after top dead center.
Plus the smoke is burning my eyes....does that mean it's running rich??
Please help
My timing with the connector unhooked is 6 btdc and after I reconnect the connector it advances to 8* after top dead center.
Plus the smoke is burning my eyes....does that mean it's running rich??
Please help
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
Im thinking you should have 26* at idle with the est wire hooked up. I just turned on my other laptop so I can look at a datalog to confirm that. Yes, if your eyes are burning its rich. Could be caused by the slow timing. Do you have a laptop ?? Datamaster could be a big help and you can use it 20 times free.
I do have a laptop, how would I connect it to my ecm??
Last edited by 1982CorvetteDude; Jun 14, 2007 at 05:36 PM.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
Last edited by 1982CorvetteDude; Jun 13, 2007 at 11:18 PM.
Thread Starter
Melting Slicks
Joined: Jun 2005
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From: Arkansas
Le Mans Master
Joined: Jul 2005
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From: Austin Texas
Thread Starter
Melting Slicks
Joined: Jun 2005
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Likes: 2
From: Arkansas
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Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
26* advance. You need to get a cable. You can buy or make one. I bought one but you can make one for a few $$. There are usually some on ebay. If you go to ttspowersystems.com you can download Datamaster and get some info. Be sure and get the correct version for your ecm.Also try Moates.net for cable info. First you can go to the forum C4, Scan and tune section and read the FAQ at the top. You dont have to pay much attention to the tuning parts but read about datalogging and making the cable. Click on some of the links and check them out. If you get the Datamaster program you can PM me if you have ???s Tunerpro is also free but I have not tried it yet.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
26* advance. You need to get a cable. You can buy or make one. I bought one but you can make one for a few $$. There are usually some on ebay. If you go to ttspowersystems.com you can download Datamaster and get some info. Be sure and get the correct version for your ecm.Also try Moates.net for cable info. First you can go to the forum C4, Scan and tune section and read the FAQ at the top. You dont have to pay much attention to the tuning parts but read about datalogging and making the cable. Click on some of the links and check them out. If you get the Datamaster program you can PM me if you have ???s Tunerpro is also free but I have not tried it yet.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
One more question, I don't want to sound like an idiot but I went out and tried my scenerio again and it was 6* BTDC (EST unhooked) and it actually moved back to 16* BTDC (EST hooked back up).
Le Mans Master
Joined: Jul 2005
Posts: 5,752
Likes: 4
From: Austin Texas
Thread Starter
Melting Slicks
Joined: Jun 2005
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From: Arkansas
Le Mans Master
Joined: Jul 2005
Posts: 5,752
Likes: 4
From: Austin Texas
Yes, the advance curve will be determined by the chip. It can add timing based on the initial setting. You can advance the base timing until you see the knock sensor become active.
Race Director
Joined: Sep 2003
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From: Database Error Indiana
It would still be good to datalog. Its a great tuning and troubleshooting tool.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
This is particularly true if you’re running at high altitude. If you have no engine knock under acceleration, but the car “chugs” or “jerks” at cruising speed (light throttle application), you are getting too much vacuum advance on top of the mechanical advance. You may need to change out the vacuum advance diaphragm with an adjustable unit available from aftermarket sources. Adjust these units so that you get the most vacuum advance possible without any “chugging” or “jerking” at cruise speed.
How would that apply in my situation with an electronic distributor?
