Budget Friendly Bolt On MOD's for the L03
#51
Re: Budget Friendly Bolt On MOD's for the L03
So, a person has a vehicle originally equipped with a 048 module. The module fails.
How does he repair the vehicle WITHOUT installing a used 048 module? NAPA and AC-Delco say to just slam one of their replacement modules in place. The TP25 or the D1943A replace the 048 module. They ALSO replace the 369 module. NAPA and Delco don't mention having to revise the latency tables to suit the replacement module.
You're saying that a module change alters the timing curve. In my case, I just dropped a 369 module into a vehicle that apparently came with an 048. Now my timing curve is different?
I can't say about the 8-pin modules, but the four, five, and seven pin modules control dwell. I would expect the 8-pin module to control dwell in the same fashion--the module monitors current to the ignition coil, then provides a bias voltage to the pickup coil that alters the total voltage in the pickup coil and lead wires. The pickup coil "signal" voltage and the bias voltage work together to provide a recognizable "turn-on" trigger to the module, that begins the dwell period. The trigger can be earlier or later in the reluctor rotation, which alters when the ignition coil current is turned "on". Of course, the negative spike as the reluctor tooth passes the pickup coil tooth is the "turn off" trigger. The "on" time varies with the bias current to keep the total time "on" (the dwell) at a reasonable figure.
I don't know why that function would be removed from the module and installed in the ECM. The ECM would have to send it's bias control signal through the ignition module anyway, since the module is connected to the pickup coil, while the ECM isn't.
You say that aftermarket "ICMs" current limit the coil at a lower current than the GM "ICMs"; that means that the module is controlling the dwell. If it was the ECM, the dwell--and therefore the ignition coil current--would be the same.
Ain't reverse-engineering fun?
How does he repair the vehicle WITHOUT installing a used 048 module? NAPA and AC-Delco say to just slam one of their replacement modules in place. The TP25 or the D1943A replace the 048 module. They ALSO replace the 369 module. NAPA and Delco don't mention having to revise the latency tables to suit the replacement module.
You're saying that a module change alters the timing curve. In my case, I just dropped a 369 module into a vehicle that apparently came with an 048. Now my timing curve is different?
I can't say about the 8-pin modules, but the four, five, and seven pin modules control dwell. I would expect the 8-pin module to control dwell in the same fashion--the module monitors current to the ignition coil, then provides a bias voltage to the pickup coil that alters the total voltage in the pickup coil and lead wires. The pickup coil "signal" voltage and the bias voltage work together to provide a recognizable "turn-on" trigger to the module, that begins the dwell period. The trigger can be earlier or later in the reluctor rotation, which alters when the ignition coil current is turned "on". Of course, the negative spike as the reluctor tooth passes the pickup coil tooth is the "turn off" trigger. The "on" time varies with the bias current to keep the total time "on" (the dwell) at a reasonable figure.
I don't know why that function would be removed from the module and installed in the ECM. The ECM would have to send it's bias control signal through the ignition module anyway, since the module is connected to the pickup coil, while the ECM isn't.
You say that aftermarket "ICMs" current limit the coil at a lower current than the GM "ICMs"; that means that the module is controlling the dwell. If it was the ECM, the dwell--and therefore the ignition coil current--would be the same.
Ain't reverse-engineering fun?
#52
Supreme Member
iTrader: (11)
Join Date: Aug 2013
Location: MICHIGAN
Posts: 4,669
Received 812 Likes
on
617 Posts
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: Budget Friendly Bolt On MOD's for the L03
To be honest I wouldn't use it. I would get an AC Delco 369 ICM.
One thing that bothers me about the Dyna module is that they claim it controls the dwell. With stock ICMs the ECM controls the dwell, and does so quite well. I've also seen aftermarket ICMs current limit the coil at a lower current then the GM ICMs.
RBob.
One thing that bothers me about the Dyna module is that they claim it controls the dwell. With stock ICMs the ECM controls the dwell, and does so quite well. I've also seen aftermarket ICMs current limit the coil at a lower current then the GM ICMs.
RBob.
Keep asking questions Schurkey...learning new things all the time here.
I think.
#53
Moderator
iTrader: (1)
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,432
Likes: 0
Received 227 Likes
on
212 Posts
Car: check
Engine: check
Transmission: check
Re: Budget Friendly Bolt On MOD's for the L03
So, a person has a vehicle originally equipped with a 048 module. The module fails.
How does he repair the vehicle WITHOUT installing a used 048 module? NAPA and AC-Delco say to just slam one of their replacement modules in place. The TP25 or the D1943A replace the 048 module. They ALSO replace the 369 module. NAPA and Delco don't mention having to revise the latency tables to suit the replacement module.
You're saying that a module change alters the timing curve. In my case, I just dropped a 369 module into a vehicle that apparently came with an 048. Now my timing curve is different?
I can't say about the 8-pin modules, but the four, five, and seven pin modules control dwell. I would expect the 8-pin module to control dwell in the same fashion--the module monitors current to the ignition coil, then provides a bias voltage to the pickup coil that alters the total voltage in the pickup coil and lead wires. The pickup coil "signal" voltage and the bias voltage work together to provide a recognizable "turn-on" trigger to the module, that begins the dwell period. The trigger can be earlier or later in the reluctor rotation, which alters when the ignition coil current is turned "on". Of course, the negative spike as the reluctor tooth passes the pickup coil tooth is the "turn off" trigger. The "on" time varies with the bias current to keep the total time "on" (the dwell) at a reasonable figure.
I don't know why that function would be removed from the module and installed in the ECM. The ECM would have to send it's bias control signal through the ignition module anyway, since the module is connected to the pickup coil, while the ECM isn't.
You say that aftermarket "ICMs" current limit the coil at a lower current than the GM "ICMs"; that means that the module is controlling the dwell. If it was the ECM, the dwell--and therefore the ignition coil current--would be the same.
Ain't reverse-engineering fun?
How does he repair the vehicle WITHOUT installing a used 048 module? NAPA and AC-Delco say to just slam one of their replacement modules in place. The TP25 or the D1943A replace the 048 module. They ALSO replace the 369 module. NAPA and Delco don't mention having to revise the latency tables to suit the replacement module.
You're saying that a module change alters the timing curve. In my case, I just dropped a 369 module into a vehicle that apparently came with an 048. Now my timing curve is different?
I can't say about the 8-pin modules, but the four, five, and seven pin modules control dwell. I would expect the 8-pin module to control dwell in the same fashion--the module monitors current to the ignition coil, then provides a bias voltage to the pickup coil that alters the total voltage in the pickup coil and lead wires. The pickup coil "signal" voltage and the bias voltage work together to provide a recognizable "turn-on" trigger to the module, that begins the dwell period. The trigger can be earlier or later in the reluctor rotation, which alters when the ignition coil current is turned "on". Of course, the negative spike as the reluctor tooth passes the pickup coil tooth is the "turn off" trigger. The "on" time varies with the bias current to keep the total time "on" (the dwell) at a reasonable figure.
I don't know why that function would be removed from the module and installed in the ECM. The ECM would have to send it's bias control signal through the ignition module anyway, since the module is connected to the pickup coil, while the ECM isn't.
You say that aftermarket "ICMs" current limit the coil at a lower current than the GM "ICMs"; that means that the module is controlling the dwell. If it was the ECM, the dwell--and therefore the ignition coil current--would be the same.
Ain't reverse-engineering fun?
With the small cap distributor (8-pin module) the ECM controls the dwell. Except during cranking where it goes to the maximum possible.
The ICM controls the maximum current through the coil. If the dwell is longer then it takes to reach the current limit, the ICM flatlines the current at the limit and holds it until the plug gets fired.
RBob.
#54
Re: Budget Friendly Bolt On MOD's for the L03
I would like to say that 90% of what I know about cars comes from research performed due to a problem I was having. The nice thing is that the more you fix, the more you increase your general knowledge.
#57
Supreme Member
iTrader: (4)
Join Date: Dec 2001
Location: Chicagoland
Posts: 9,761
Received 584 Likes
on
402 Posts
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Budget Friendly Bolt On MOD's for the L03
All you need to know is the 048 starts killing your power over 3500 RPM and the 369 starts pumping up your power over 3500.
The following users liked this post:
chazman (07-19-2023)
#60
Re: Budget Friendly Bolt On MOD's for the L03
And yet, if you don't use the 369 module with the correct latency table, apparently you won't get appropriate results.
Don't think that I understand this any more than you guys.
Don't think that I understand this any more than you guys.
Last edited by Schurkey; 07-07-2016 at 04:10 PM.
#64
Supreme Member
iTrader: (2)
Join Date: Mar 2014
Location: South Ms
Posts: 4,477
Received 753 Likes
on
516 Posts
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Budget Friendly Bolt On MOD's for the L03
You guys are funny! DynoDave you got a good laugh out of me! A soccer mom in a Nissan Murano made me decide not to go any farther with my L03. I will just build another engine for later down the road and enjoy my great gas mileage and reliable lil swirlport engine for now
#65
Supreme Member
iTrader: (11)
Join Date: Aug 2013
Location: MICHIGAN
Posts: 4,669
Received 812 Likes
on
617 Posts
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: Budget Friendly Bolt On MOD's for the L03
Dating myself here...I heard Del Reeve's at a concert describe a member of his band as being like a little camp fire off in the woods. Warm, friendly, but not too damn bright.
I think of the L03 sort of the same way. It's a good little engine, reliable, moves along OK, but not very fast.
Modern vehicle give us fits for sure. I always take the high road, and refuse to street race. That's my story, and I'm sticking to it.
My current L03 is my 3rd one, so obviously I have no qualms about owning one.
But you've got 3.73s behind yours, dmccain. What are you complaining about!
I think of the L03 sort of the same way. It's a good little engine, reliable, moves along OK, but not very fast.
Modern vehicle give us fits for sure. I always take the high road, and refuse to street race. That's my story, and I'm sticking to it.
My current L03 is my 3rd one, so obviously I have no qualms about owning one.
But you've got 3.73s behind yours, dmccain. What are you complaining about!
#66
Supreme Member
iTrader: (2)
Join Date: Mar 2014
Location: South Ms
Posts: 4,477
Received 753 Likes
on
516 Posts
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Budget Friendly Bolt On MOD's for the L03
Custom chip, bumped up fuel pressure,S10 torque converter, built 700R4, 3 in exhaust cat-delete.. still slower than the Murano! Lol. Im ok with it for now Dave but when my 350 or 400 sbc which ever I decide to build goes in...I will make sure I can at least run with factory pickups and most grocery getters today which is a tall order when pretty much stock pickups run close to 13sec timeslips these days.
#68
Supreme Member
iTrader: (2)
Join Date: Jan 2005
Location: Hurst, Texas
Posts: 10,122
Received 429 Likes
on
369 Posts
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Budget Friendly Bolt On MOD's for the L03
Custom chip, bumped up fuel pressure,S10 torque converter, built 700R4, 3 in exhaust cat-delete.. still slower than the Murano! Lol. Im ok with it for now Dave but when my 350 or 400 sbc which ever I decide to build goes in...I will make sure I can at least run with factory pickups and most grocery getters today which is a tall order when pretty much stock pickups run close to 13sec timeslips these days.
Last edited by Fast355; 07-14-2016 at 01:21 AM.
#69
Supreme Member
iTrader: (4)
Join Date: Dec 2001
Location: Chicagoland
Posts: 9,761
Received 584 Likes
on
402 Posts
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Budget Friendly Bolt On MOD's for the L03
Not to bring up an old thread, but do we have a current part number for the 369 ICM?
#70
Supreme Member
iTrader: (14)
Join Date: Nov 2008
Location: Milwaukee
Posts: 2,018
Received 155 Likes
on
129 Posts
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: Budget Friendly Bolt On MOD's for the L03
The new number is this,
https://www.summitracing.com/parts/ado-d1943a
I'm not backing that up with firsthand knowledge, just what my search lead to
The following users liked this post:
chazman (07-19-2023)
#71
Supreme Member
iTrader: (4)
Join Date: Dec 2001
Location: Chicagoland
Posts: 9,761
Received 584 Likes
on
402 Posts
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Budget Friendly Bolt On MOD's for the L03
Who can identify this ICM? I was expecting to see either 048 or 369 when I lifted the cap. It’s from an ‘87 LG4
#73
Supreme Member
iTrader: (4)
Join Date: Dec 2001
Location: Chicagoland
Posts: 9,761
Received 584 Likes
on
402 Posts
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Budget Friendly Bolt On MOD's for the L03
Probably 369?
#74
Member
Re: Budget Friendly Bolt On MOD's for the L03
I lean on the more negative side. Just keep it up to date on maintenance or put some nitrous on it. I feel you either need to change everything or nothing. Best bang will always be a little nitrous to have a little fun.
these performance mods are out of hand. I saw a .25 injector pod spacer claiming some large HP increase. It's all a sales gimmic. Throttle body, cam. Heads. Exhaust. And all of them or nitrous. Only real options.
these performance mods are out of hand. I saw a .25 injector pod spacer claiming some large HP increase. It's all a sales gimmic. Throttle body, cam. Heads. Exhaust. And all of them or nitrous. Only real options.
Thread
Thread Starter
Forum
Replies
Last Post
89irocz355
Engine/Drivetrain/Suspension Parts for Sale
26
09-12-2016 01:28 PM
BG1959
Engine/Drivetrain/Suspension Wanted
7
07-20-2016 02:22 PM