Advance Springs
Thread Starter
Instructor
Joined: May 2004
Posts: 127
Likes: 0
From: Aurora CO
Advance Springs
We set up our advance by removing the springs and setting it at 38 degrees at 2800 rpm. When we put the springs in and rechecked it the advance was at 35 degrees at 2800. I assume this means I should get softer springs. Went to Checker and they did not know what I was talking about. Where can I find an assortment of springs to use?
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
You need to rev it higher to see where the rest of the advance (if there is any more) comes in. In some cases the springs themselves are stiff enough to limit total but it looks like yours (all but 3º by 2800) aren't very stiff. In any case, I prefer setting total with the springs installed so I know what I'm actually getting and not what I should be getting.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by Vetterodder
You need to rev it higher to see where the rest of the advance (if there is any more) comes in. In some cases the springs themselves are stiff enough to limit total but it looks like yours (all but 3º by 2800) aren't very stiff. In any case, I prefer setting total with the springs installed so I know what I'm actually getting and not what I should be getting.
i agree....the springs will limit the total advance....any speed shop will carry them including summit
Safety Car
Joined: Jun 2004
Posts: 4,652
Likes: 80
From: Lakeland Florida
When I went looking for springs, my local parts store said they do not carry them.
After looking at the high performance parts section I found a distributor recurve kit that comes with the new distributor cams and 3 sets of springs. All that for only $7.99
So they do not carry the individual springs, but they do carry an ignition recurve kit. Try asking for that at your local parts store.
kdf
After looking at the high performance parts section I found a distributor recurve kit that comes with the new distributor cams and 3 sets of springs. All that for only $7.99
So they do not carry the individual springs, but they do carry an ignition recurve kit. Try asking for that at your local parts store.
kdf
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by kdf1986
When I went looking for springs, my local parts store said they do not carry them.
After looking at the high performance parts section I found a distributor recurve kit that comes with the new distributor cams and 3 sets of springs. All that for only $7.99
So they do not carry the individual springs, but they do carry an ignition recurve kit. Try asking for that at your local parts store.
kdf
After looking at the high performance parts section I found a distributor recurve kit that comes with the new distributor cams and 3 sets of springs. All that for only $7.99
So they do not carry the individual springs, but they do carry an ignition recurve kit. Try asking for that at your local parts store.
kdf
Burning Brakes
Joined: Jun 2002
Posts: 837
Likes: 3
From: Texas
My local auto parts store stocks advance kits from Mr.Gasket. The HEI kit has weights and springs. For points type dist. (what I needed) it was just 3 sets of springs.....the #928 kit. It bothered me that the package didn't list which springs were heavy, medium, light. The light weight springs (black) were obvious....smaller wire diameter and much shorter coil length. The gold and silver springs are identical as far as wire diameter and coil length. After contacting Mr gasket they inform me that gold is heavy and silver is medium. Maybe the heavy and medium are made from different types of material?????
Team Owner
Joined: Jul 1999
Posts: 26,545
Likes: 46
From: Huntersville NC
advance curve kit gm univ
This kit provides full advance between 2,000 and 2,800 RPMs. You get maximum power and engine acceleration. The kit contains all required weights, springs and bushings.
Model Number: 925A
(this is the kit with 3 sets of springs)
http://go.mrgasket.com/ProductDetail...txtSearch=925a
This kit provides full advance between 2,000 and 2,800 RPMs. You get maximum power and engine acceleration. The kit contains all required weights, springs and bushings.
Model Number: 925A
(this is the kit with 3 sets of springs)
http://go.mrgasket.com/ProductDetail...txtSearch=925a
Melting Slicks
Joined: Aug 1999
Posts: 3,123
Likes: 13
From: Hollywood, Florida
Originally Posted by Vetterodder
You need to rev it higher to see where the rest of the advance (if there is any more) comes in.
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Thread Starter
Instructor
Joined: May 2004
Posts: 127
Likes: 0
From: Aurora CO
According to Lars paper thats what I did. You are correct it maxes the mech advance righ away. Its my understanding if the springs are correct I should be able to get back to 38 degrees after I put the springs back. The problem, or apperent problem was it would only go to 35 degrees when the springs were put back. So I was wondering if I should get softer springs.
Burning Brakes
Joined: Feb 2005
Posts: 977
Likes: 1
From: wash. dc
advance springs
lars told us at the tuning for beer in va. that he found 1 silver and 1 black to usually be the correct springs to use to get your max advance by 2800 rpm....so i'd start with that
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Originally Posted by shoptek
Since MPSJM removed the spring THEN set the timing, wouldn't it have maxed out the mechanical advance as soon as it fired, allowing him to set the timing at the MAX mechanical movement? The limits caused by the springs were removed.
Burning Brakes
Joined: Feb 2005
Posts: 977
Likes: 1
From: wash. dc
distributor springs
lars said to throw the weights that come in the kit in the trash... he found that the quality was poor and that the holes egged in no time, the stock weights are the ones to use
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
Originally Posted by 71redskin
lars said to throw the weights that come in the kit in the trash... he found that the quality was poor and that the holes egged in no time, the stock weights are the ones to use
Use the springs - chuck the weights.
