NorthstarAJ Posted November 7, 2007 Report Share Posted November 7, 2007 I can do some tuning on Northstar PCM's I am working on a new project that uses a LS1 PCM on a Northstar. This is a GM setup that I will be using. It is 100% safe, but it may take some work in a production car. The Corvette had most of the same module so it can be worked out. Currently this is a 96 to 99 program, But I see not problem running it on a 00 to 03 car. This is a RWD program, but again I looked it over and it looks to be FWD friendly. Current projects or finished programs are as follows 93 to 95 I am just in the start up phase 96 to 99 Deville's, Eldo's, and 96, 97 Seville's I have done two, but I need more time. 98 & 99 Seville's I have done a lot of work on this program. 96 to 99 Northstar with LS1 Just in start up 00 to 03 all Northstar's I have this well covered The 98 and 99 Seville program I have cranked up the speedlimiter, increased the torque management up to 99%, increased the torque out put on low RPM's, The 00 to 03 Northstar I have done some major tuning Speedlimiter moved to 155mph, Moved the shift point just a little higher, corrected some shifting problems, knocked a second or more off in the quarter mile. I have a little more on the stage one program to do and then I will move into the second phase. 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 7, 2007 Report Share Posted November 7, 2007 What shifting problems did you correct, can you explain that in detail. We have a member named Mark that used a piggyback computer to fool the PCM. The PCM is virtually untweakable, it reacts to protect the engine and we have been told it is hack proof. I am also not surprised to see you have not mentioned the air-fuel ratio, but its not tweakable on the stock PCM What are you doing this with a TECH2?, the dealer can raise the speed limit but refuses to because of the liability involved. Only STSs and ETCs with the Z rated package have the 155 mph speed limit, standard Sevilles and Eldos are not equipped to have that limit. Explain to us how you are doing this, by the way with no numbers on your graph it is telling us very little, do you have one with numbers on it? Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted November 7, 2007 Report Share Posted November 7, 2007 Removing the torque management and speed limiter would make a nice combo for most people. That should help the car get off the line better, and lots of people are fascinated with top speed, even if they don't plan to make use of it. Cadillac played with the shift points a bit also along the way, moving the redline/shift up to 6700rpm as I recall on some models. So far my understanding is that he is splicing together calibrations then using the TechII to apply the resulting hybrid calibration. Very much science project stuff so far but some promising results, and a lot of interest from enthusiasts. The torque management routines are designed to protect the transmission from the torque of the engine during shifting. Removal of the torque management is a trade off, but it is a classic first step in PCM tuning in many applications. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
Logan Posted November 7, 2007 Report Share Posted November 7, 2007 His chart is color based. Look at the table colors and then look at the data line color. Logan Diagnostic LLC www.airbagcrash.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 7, 2007 Report Share Posted November 7, 2007 His chart is color based. Look at the table colors and then look at the data line color. Yes but I was looking for more data, should I see a range of RPMs, RPMs at shift points, etc? I'd like to see labels on the X and Y axis if possible Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 7, 2007 Author Report Share Posted November 7, 2007 This is an 02 SLS VIN Y before and after Look at the time frames on the bottom of each. I will do the math later After 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 7, 2007 Author Report Share Posted November 7, 2007 Before was 0 to 67mph in 9.58 after was 0 to 71 in 9.215 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
MAC Posted November 7, 2007 Report Share Posted November 7, 2007 Before was 0 to 67mph in 9.58 after was 0 to 71 in 9.215 I don't mean to be rude, but what is 0-60mph time? 0 to 67 and 0 to 71 doesn't tell me much. Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 7, 2007 Author Report Share Posted November 7, 2007 Before was 0 to 67mph in 9.58 after was 0 to 71 in 9.215 I don't mean to be rude, but what is 0-60mph time? 0 to 67 and 0 to 71 doesn't tell me much. After was 0 to 60 6.965 second I do not have the before snapshot with me at work. 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 8, 2007 Author Report Share Posted November 8, 2007 before was 8.137 0 to 60 on John's car. 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 8, 2007 Author Report Share Posted November 8, 2007 This is a Very fine DHS I tuned up This is a test drive in that DHS that is tuned. This is a 275hp VIN Y 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
MAC Posted November 8, 2007 Report Share Posted November 8, 2007 This is a Very fine DHS I tuned up </a> This is a test drive in that DHS that is tuned. This is a 275hp VIN Y </a> Do you actually have a 12.58 seconds Northstar or is it your goal to tune one to be able to get that time? I believe that 12.58 seconds in the 1/4-mile is better than both the CTS-V and STS-V. Link to comment Share on other sites More sharing options...
_DTS_ Posted November 8, 2007 Report Share Posted November 8, 2007 Do you actually have a 12.58 seconds Northstar or is it your goal to tune one to be able to get that time? Did you see AJ's avatar? I think he stuffed that N* into a fierro, hence the time. I believe him when he says that. I saw the car. I met with AJ and he did a tune for me about a month ago, or so, and I am very happy with the results. I am hoping to get back on the dyno in a couple of weeks and post my times after I change my plugs. I just happen to be lucky enough to live close by. Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 8, 2007 Author Report Share Posted November 8, 2007 Do you actually have a 12.58 seconds Northstar or is it your goal to tune one to be able to get that time? Did you see AJ's avatar? I think he stuffed that N* into a fierro, hence the time. I believe him when he says that. I saw the car. I met with AJ and he did a tune for me about a month ago, or so, and I am very happy with the results. I am hoping to get back on the dyno in a couple of weeks and post my times after I change my plugs. I just happen to be lucky enough to live close by. I am working on a new piece for that tune and WOW is the word 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
_DTS_ Posted November 8, 2007 Report Share Posted November 8, 2007 Do you actually have a 12.58 seconds Northstar or is it your goal to tune one to be able to get that time? Did you see AJ's avatar? I think he stuffed that N* into a fierro, hence the time. I believe him when he says that. I saw the car. I met with AJ and he did a tune for me about a month ago, or so, and I am very happy with the results. I am hoping to get back on the dyno in a couple of weeks and post my times after I change my plugs. I just happen to be lucky enough to live close by. I am working on a new piece for that tune and WOW is the word Hell yeah! Please let me know, I want in! I feel like a kid again with this car (and I am kicking some *ss with it too, lol). Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 8, 2007 Author Report Share Posted November 8, 2007 I found some old graphs 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 8, 2007 Author Report Share Posted November 8, 2007 I can't make a Caddy this fast yet, but I am working on it. This was not that fast of a run. I had some bad tire spin off the line and bucking on the top end. 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
BodybyFisher Posted November 8, 2007 Report Share Posted November 8, 2007 What is the bucking at the top end from? Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 8, 2007 Author Report Share Posted November 8, 2007 Worn bushing in the trans by the final drive and very short axle shafts. 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 13, 2007 Author Report Share Posted November 13, 2007 http://www.youtube.com/watch?v=VXTMhojkmhE 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 13, 2007 Author Report Share Posted November 13, 2007 I have had my tuning thread over on another forum and I guess I need to go back a little bit and explain some things. I have some GM software used to alter the programs. This for me is very time consuming and I have troubles at the end getting it to finalize. I have found a way with that program to copy a portion and paste it into another program. This will change shift points, torque, Power Enrichment, spark, max speed, Trans pressure, and emission devices. Now this is all within GM standards so this way it is all GM and will never damage an engine. I have worked over my program in my Turd, but if it breaks it is mine. If I break your car I now have a problem. Yes I am taking the safe way out. 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
GreenMachine Posted November 17, 2007 Report Share Posted November 17, 2007 can you disable DTC's? Or allow the vehicle to start in first gear with the ABS/Traction lights on? A 1500-3000 dollar repair for the EBTCM/BPMV is a bit steap but would like to at least get first gear back...WOT 0-80 or close to on 1 gear just ain't right. Vehicle is a base 98 Deville. The Green's Machines 1998 Deville - high mileage, keeps on going, custom cat-back exhaust 2003 Seville - stock low mileage goodness! 2004 Grand Prix GTP CompG - Smaller supercharger pulley, Ported Exhaust Manifolds, Dyno tune, etc 1998 Firebird Formula - 408 LQ9 Stroker motor swap and all sorts of go fast stuff Link to comment Share on other sites More sharing options...
NorthstarAJ Posted November 17, 2007 Author Report Share Posted November 17, 2007 can you disable DTC's? Or allow the vehicle to start in first gear with the ABS/Traction lights on? A 1500-3000 dollar repair for the EBTCM/BPMV is a bit steap but would like to at least get first gear back...WOT 0-80 or close to on 1 gear just ain't right. Vehicle is a base 98 Deville. I have enabled first gear starts. I switched PCM's for testing and I have not got it to stay locked in for more than about 15 starts or 3 days. Don't know why it just won't stay. I can go back in and work on it, but I am working or another project. I hope that project will work on your car also. It will be a LS1 PCM. I will keep you posted on the progress 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
NorthstarAJ Posted January 11, 2008 Author Report Share Posted January 11, 2008 I am headed to the dyno with two cars. 12.58 second Northstar with a GM/Cadillac PCM Cadillac Technician @ Crest Cadillac Brookfield WI Hometown Washougal WA Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted January 12, 2008 Report Share Posted January 12, 2008 says Video removed? Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
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