Tim240z Posted June 25, 2003 Share Posted June 25, 2003 Doesn't work for the $EE definition file cars (94 - 95 Y, F & B CAR 5.7L, LT1 ), but other will be happy. http://www.tunercat.com/tnr_desc/do_tc.html Tim Quote Link to comment Share on other sites More sharing options...
strotter Posted June 25, 2003 Share Posted June 25, 2003 I just Monday started the tuning process on my TBI system. It's a total hybrid motor - a 327 with a Holley 670 intake, single-plane, Comp 270 cam, Vortec heads, roller everything, five-speed, so on. None of the PROMs I found are even a good *approximate* starting point, especially with the cam. This thing may be a gigantic time-saver. The only downside I see is me running into a tree 'cause I'm looking down at the display at the wrong moment. Hey, maybe I can win a Darwin award! "Guy wanting to go fast ends up stopping fast!" I ordered a Romulator and the software anyway. Quote Link to comment Share on other sites More sharing options...
Mudge Posted June 27, 2003 Share Posted June 27, 2003 You need a PCM simulator for this to work. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted June 27, 2003 Author Share Posted June 27, 2003 damn Mudge....where you been dude! Quote Link to comment Share on other sites More sharing options...
strotter Posted June 27, 2003 Share Posted June 27, 2003 What's a "PCM simulator"? Quote Link to comment Share on other sites More sharing options...
Mudge Posted June 28, 2003 Share Posted June 28, 2003 damn Mudge....where you been dude! LoL... I am waiting for my MegaSquirt stuff, I have the electronics but am waiting for the Bowling/Grippo stuff to arrive. Its just flat depressing without it running, I dont know what "went wrong" with the stock setup. After I got another coil bracket from a member, I had spark! But no fire, I am only guessing not enough fuel pressure because there was a leak with one of my connections thanks to an incorrect thread. So I gave up, ordered the MS and hopefully it will run, someday if not I'm going to get a freaking V8. Quote Link to comment Share on other sites More sharing options...
Mudge Posted June 28, 2003 Share Posted June 28, 2003 What's a "PCM simulator"? Some Aftermarket tuners use these, its imply a hardware and software simulator of the real deal. Developers use these all the time, or sometimes the actual hardware hacked up and interfaced with a PC (Playstation developers, etc). This is what allows the real time changes, since the actual PCM cannot do this, it has to be flashed from front to back which takes 3 minutes. The $EE PCM has two flash chips, the T and M chip, thats the only PCM I know because I have a 94 Z28. 93 and previous was a removable PROM, similar to most older cars. Quote Link to comment Share on other sites More sharing options...
strotter Posted June 29, 2003 Share Posted June 29, 2003 Sounds like the Romulator (I just *love* that name, don't you?) is a system of this type. To use it you remove your existing EPROM and plug in the adapter, plug the box into the adapter, plug the PC into the box, load the Tunercat software with the appropriate mask and .bin files. Some of the guys at ThirdGen have reported that the changes take "a second or two" while driving down the road (or actually pulled over, I hope). One individual (ski_dwn_it) has a '7148 ECM (the $31 mask, very similar to my 7747 ECM w/ the $42 mask), posted (and note that he's using 2 laptops, which isn't necessary if you have 2 serial ports, and may not even be necessary if you have only one): I would drive down the road, watch the other laptop's blms. Pull into a safe location. Make a change to the inj const, pull back out...drive/watch , pull in make another change....repeated the process for about 1 hr till [nearly every cell was] at 127, with one or two stragglers at 133. Again tuned the starting tables so it fires nearly instantly. All this was done without ever getting out of my seat. LOL Once you've made changes to your satisfaction, you burn the finalized chip. Of course, you still need a burner and EPROMS and whatnot, but the Tunercat software saves a burn-ready .bin file. I've been struggling with a tip-in problem, and have managed to go too rich / too lean back and forth several times. Half of the problem is the long lead-time between changes - half an hour at the very least, usually the next day. I'm kind of sneaking up on it, but with one of these things I think I can zero in on it in a matter of a couple of hours. Plus, maybe get the idle stabilized.... Quote Link to comment Share on other sites More sharing options...
Mudge Posted June 29, 2003 Share Posted June 29, 2003 Making a change to the injector constant effects the whole RPM band however, as opposed to a VE table at a specific RPM, etc Quote Link to comment Share on other sites More sharing options...
strotter Posted June 30, 2003 Share Posted June 30, 2003 It's possible to modify *any* of the variables in Tunercat, including: ECM Switch Parameters: Err 24, Vehicle Speed Error , X=Enabled Err 32, EGR Error Enable, X=Enabled Err 42, EST Diagnostic, X=Enabled Err 43, ESC Error Enable, X=Enabled ECM Constants: Main Spark Bias Initial Spark Advance Extended Spark RPM Slope Max RPM for Extended RPM Spark Min. Speed To Enable Highway Mode Spark Time Delay To Enable Highway Mode Spark Bypass Power Enrichment Delay Power Enrichment Mode Delay BPW Constant EGR On, (% TPS) EGR Off, (% TPS) EGR Off, (Speed) EGR On, (Speed) Low MAP EGR Off, (MAP) Low MAP EGR On, (MAP) Minimum MAP for BLM Maximum MAP for BLM Maximum RPM for BLM Speed to Enable Open Loop Idle % TPS To Enable Open Loop Idle Maximum AFR At Open Loop Idle Lean Idle AFR At Open Loop Maximum AFR In Open Loop (Non-idle) Warm Closed Loop Delay Timer Cold Closed Loop Timer Min. Coolant Temp. For Closed Loop Fuel Open Loop Idle AFR Enable RPM Threshold Open Loop Idle AFR Disable RPM Threshold Open Loop Idle AFR Enable Delay Open Loop Idle AFR Time Delay TCC Lock, Low Gears, High Speed TCC Lock, Low Gears, Low Speed TCC Lock, High Gears, High Speed TCC Lock, High Gears, Low Speed IAC Park Position IAC Park or Neutral Offset Idle RPM Adder - A/C On Maximum BLM Value Minimum BLM Value Minimum Integrator Value Maximum Integrator Value Stoichiometric AFR PROM ID Tables: ECM Switch Table ECM Constant Table Main Spark Table Cool Compensation Spark Advance Power Enrichment Spark (Deg) Highway Mode Spark Advance Vs. Vacuum Max Knock Retard Vs. RPM (in PE) Max Knock Retard Vs. MAP Main Fuel Table #1, % Volumetric Efficiency Main Fuel Table #2, % Volumetric. Efficiency Adder % TPS Threshold Vs. RPM for PE Mode Power Enrichment Air Fuel Ratio Vs. RPM Accel. Enrichment Vs. Differential TPS Accel. Enrichment Vs. Differential MAP Open Loop Air Fuel Ratio Vs. Coolant Temp. Air Fuel Ratio at Startup Vs. Cool. Temp. (Choke) Open Loop Air Fuel Ratio Vs. MAP Choke Air Fuel Ratio Multiplier Vs. Coolant Temp. Crank Air Fuel Ratio Vs. Coolant Temp. BLM Cell RPM Boundaries BLM Cell MAP Boundaries IAC Steps Vs. Coolant Temp. Target Idle RPM Vs. Coolant Temp. EGR Spark Advance Vs. % EGR % EGR Vs. Load Vs. RPM EGR Correction Vs. Load Vs. EGR Duty Cycle BPW Constant Vs. Air Flow Vs. EGR D.C. TCC Load Upper Limit vs MPH, (Low Gears) TCC Load Lower Limit Vs. MPH, (Low Gears) TCC Load Upper Limit vs MPH, (High Gear) TCC Load Lower Limit vs MPH, (High Gear) Quote Link to comment Share on other sites More sharing options...
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