LT1-LT4 Modifications 1993-97 Gen II Small Block V8

reluctor fabrication

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Old 09-22-2014, 06:34 PM
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curent plan is to start teardown on the truck this Friday/Saturday. I have several updates/mods/repairs to get done as well. should be field testing within 2 to 4 weeks.

If I havent posted earler, the prototype is built, signals worked out, ready to mod the truck for quick distributor switch over (incase of an unforseen failure) I am anticipating a couple of issues due to unknown parameters. otherwise hopeing for smooth sailing.
Old 09-22-2014, 07:57 PM
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Awesome news, lookin forward to the results.
Old 09-24-2014, 12:14 AM
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How many people want to switch to a 411 PCM? I'm trying to understand the motivation.

Bob
Old 09-24-2014, 11:39 AM
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A lot of people, for various reasons. LT1 tuners are getting hard to find, there is much better tuning software available for the 0411 pcm, and more tuners willing to tune them. also you get to ditch the hard to service Optispark. enough reasons for most of us. and this option is much cheaper than the EFI 24x.
Old 09-24-2014, 11:50 AM
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yeah, many good points. And lots of ways to go with this.

The vortec distributor at the back is going to be a pain for the F-body guys, Impalas and Vettes should be a little easier. (and truck/jeep/transplant guys)

whats the current favorite tuning software for the 411's, EFI live, HP tuners or something else? I have my old LT1 stuff kicking around here, which worked fine last time I did any tuning. I don't think the stock PCM is too much of a limitation for most builds.

It does seem that there is some middle ground between the stock stuff and the 24x.

Bob
Old 09-24-2014, 04:18 PM
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Originally Posted by TurboBob
yeah, many good points. And lots of ways to go with this.

The vortec distributor at the back is going to be a pain for the F-body guys, Impalas and Vettes should be a little easier. (and truck/jeep/transplant guys)

whats the current favorite tuning software for the 411's, EFI live, HP tuners or something else? I have my old LT1 stuff kicking around here, which worked fine last time I did any tuning. I don't think the stock PCM is too much of a limitation for most builds.

It does seem that there is some middle ground between the stock stuff and the 24x.

Bob

the 411 is capable of running 4,6, and 8 cylinders, CNP, coil packs, and Standard EFI distributor, TBI, TPI, MPFI, CPFI. plus it is way easer to tune. as far as tuning software, it is about 50/50, EFILive / HP Tunners. I personally am running EFILive. the Bigest reason to go 411 for the LT guys, is to get away from the Opti-no-spark. it will make the system more reliable IMO
Old 09-24-2014, 04:55 PM
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in later vehicles, doing PCM swaps like this causes issues with other controllers in the car, like fancy dashboards in the vettes, trip computers, body modules, etc.

I'm pretty familiar with the F body and Impala, but do the vettes have problems like this when swapping?

I'm thinking that an interface that converts opti signals to 24x + cam could be a cool gadget. It would allow the PCM conversion with no engine changes, and then if (ok, when) the opti dies, convert the rest of the way....?

You're making me wish I still had my Impala....

Bob
Old 09-24-2014, 07:44 PM
  #128  
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The last year of the LT1 was in the late 90s so any car that had an LT1 stock isnt going to have any problems with a 0411.
Old 09-24-2014, 08:53 PM
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Cool.
Old 09-24-2014, 10:18 PM
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Originally Posted by TurboBob
in later vehicles, doing PCM swaps like this causes issues with other controllers in the car, like fancy dashboards in the vettes, trip computers, body modules, etc.

I'm pretty familiar with the F body and Impala, but do the vettes have problems like this when swapping?

I'm thinking that an interface that converts opti signals to 24x + cam could be a cool gadget. It would allow the PCM conversion with no engine changes, and then if (ok, when) the opti dies, convert the rest of the way....?

You're making me wish I still had my Impala....

Bob
he later ECU's had to interface with SEVERAL other smart boxes, as well as in the case of my wifes Trailblazer, controlled cam timing, I aint ready to get into that one yet.
Old 09-26-2014, 07:27 AM
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Originally Posted by ccreddell
The last year of the LT1 was in the late 90s so any car that had an LT1 stock isnt going to have any problems with a 0411.
I doubt there would be a problem with the Camaros. However the LT1 Corvettes ECM connects to the CCM, and using a different one can cause a few issues.
Old 09-29-2014, 04:40 PM
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Originally Posted by ChevyOwner
I doubt there would be a problem with the Camaros. However the LT1 Corvettes ECM connects to the CCM, and using a different one can cause a few issues.
if I am not mistaken? the 411 has a data buss as well, that is how the BCM sent the Tow/Haul signal to the ECU. ????

ok Guys the wait is almost over! the truck went down Saturday, "2nd time in a week" same scenerio, tach dropped to "0" motor shut down, and we were coasting. last time it was a bad amplifier. I questioned the coil last time as well, this time it will get changed for sure. I have seen this a lot with bad plug wires, mine are Taylor spiral wound, so they should be good, but I will check them to!

I will start the teardown wednesday, hopefully be up and running in 10 days. stay tuned, the adventure is about to start.

Last edited by Tinbender59; 09-29-2014 at 04:47 PM.
Old 09-29-2014, 04:48 PM
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Question??? do I start a new thread???
Old 09-30-2014, 08:02 AM
  #134  
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Originally Posted by Tinbender59
if I am not mistaken? the 411 has a data buss as well, that is how the BCM sent the Tow/Haul signal to the ECU. ????

ok Guys the wait is almost over! the truck went down Saturday, "2nd time in a week" same scenerio, tach dropped to "0" motor shut down, and we were coasting. last time it was a bad amplifier. I questioned the coil last time as well, this time it will get changed for sure. I have seen this a lot with bad plug wires, mine are Taylor spiral wound, so they should be good, but I will check them to!

I will start the teardown wednesday, hopefully be up and running in 10 days. stay tuned, the adventure is about to start.
It is my understanding that none of the fuel related information that gets displayed on the dash will work without the correct ECM to match the CCM. Not sure on some of the other things that get displayed on the LCD.
Old 10-01-2014, 02:07 PM
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Originally Posted by Tinbender59
Question??? do I start a new thread???
yes..
Old 10-23-2014, 05:33 PM
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the motor is down to a long block, I will be putting an LT4 hot cam in then back together it goes, MagnaTronX is assembled (I will be testing functionality tonight, and post results) Hope to have it back up and running By 11/2/14 On the MagnaTronX. Waa Hoo
Old 10-23-2014, 10:45 PM
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Here is a picture of the motor, and truck tore down, Im headed out to test the MagnaTronX Now!! Ill be back
Attached Thumbnails reluctor fabrication-kimg0119.jpg  
Old 10-23-2014, 11:45 PM
  #138  
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IT WORKS!!!! https://www.flickr.com/photos/tinbender59/15427254347/ the 12vdc light flashes on and off!! next is to get it mounted and check the timming
Old 10-24-2014, 02:37 AM
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I wrote a book & timed out... Ughh
I think youd be way better off with an XE or XFI 258 LT1 cam in that heavy 4x4!!! If you tow or do any wheelin the specs of a 252 or 258 Xtreme roller would be better... I wouldnt go over a 260 adv duration... 218 or 220 @ .05 is a bit much on a heavy 4x4... I wouldnt put a Hot Cam in My Solid Axle S10 ext cab Im buildin but a Xtreme 252 or 258 with atleast .550 lift with 1.6 rockers will be good to go in My book... Just My 2cents
Old 10-24-2014, 08:47 AM
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Originally Posted by warriorcustoms
I wrote a book & timed out... Ughh
I think youd be way better off with an XE or XFI 258 LT1 cam in that heavy 4x4!!! If you tow or do any wheelin the specs of a 252 or 258 Xtreme roller would be better... I wouldnt go over a 260 adv duration... 218 or 220 @ .05 is a bit much on a heavy 4x4... I wouldnt put a Hot Cam in My Solid Axle S10 ext cab Im buildin but a Xtreme 252 or 258 with atleast .550 lift with 1.6 rockers will be good to go in My book... Just My 2cents
i've wondered about that, but I could not find solid info. at this point I have it and i'm there, and I don't have $300 to get another one, so here I go, but thanks for the heads up


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