I am really debaiting getting this piece of software.

Pros/Cons............

Are there any books, videos, websites, etc. on the theorys behind the FI system that will help with tuning in general.

Thanks

Neal

 

I use it and love it! I would consider changing to OBDI though. At the most, I think you just have to change the knock sensors. Measure them. If they are 100K OHM, you are good to go! Tuning seems to be a little easier with the OBDI.
There is a mailing list. There should be a link to the mailing list on the web site. http://www.carputing.com . Check that out. You also have US!!! Your friends on the Corvette Forum. :) :)
Let me know if you need any help getting off the ground. I am more than happy to help.

 

I use the LT1 edit software on my '94 Vette.

It is the greatest thing since sliced bread. You can do as little modification or as much modification as you feel is needed. I weigh alot of pro's for the software and would definitely recommend it. Info can be found on http://www.lt1.net/editor/ about the software. May also want to do a search for Tunercat for LT1's. (it's a little cheaper and same functionality different interface)

As for con's the only things I can think of; have to be carefull uploading new flashes to the computer (don't want any power outages or hung laptops) or else your car will be dead until a new or fixed PCM / ECU is used. Also need to do your homework / research to pervent yourself from making too many bad changes.

As long as your carefull the software is the best thing.

P.S. Check http://www.camaroz28.com under computer tuning or subscribe to the LT1 mail group to get detailed information about programming possibilities.

 

I use the OBD2 version on my LT4 (software is the same for LT1 or LT4, the difference is in '96 they switched to obd2 which requires different software).
I often read the board that Chris mentioned. There's a lot of good info there. It definitely takes time to learn properly and properly adjust it, but it's also a lot of fun!

 

I keep saying I'm going to get the LT-1 edit but I haven't done it yet. How is it in compairison to TTS?

 

TTS?!?! That software has not been sold for YEARS!!! How did you get a copy of that?!?! There is much more functionality in LT1 Edit than in Tunercat or TTS. If you are looking for basic tuning, the TTS/tunercat software is fine.

 

Whats stuff can you do with LT1 edit compared to tunercat on OBD1 LT1 computer. Tunercat doesn't have OBD2 software ?

 

The coolest and most notable is being able to set BLM boundaries. With a highly modded car, you will find this beneficial in order to utilize more of the cells. :) Injector ballance is another. There are plenty more things also. :)

 

This is the stuff that tuner cat supports for 94-95 LT1 engines:


ECM Switch Parameters
VATS Select (X = Enabled)
Traction Control (X = Enabled)
C.A.R.S. Select (X = Enabled)
Speed Density Mode (X= Enabled)
Vehicle Speed Diagnostic, Error 24
CCP Electrical Failure, Error 26
EGR Electrical Failure, Error 27
Air Pump Diagnostic, Error 29
EGR Diagnostic, Error 32
High MAP Diagnostic, Error 33
Brake Switch Shorted Diag, Error 37
Brake Switch Open Diag, Error 38
VATS Diagnostic, Error 46
MAF System Diagnostic, Error 48
Trans. Temperature High Diag, Error 58
Trans. Temperature Low Diag, Error 59
A/C Low Charge Diagnostic, Error 61
A/C Press Sensor Diagnostic, Error 66
A/C Press Sensor Diagnostic, Error 67
A/C Relay Diagnostic, Error 68
A/C Clutch Diagnostic, Error 69
A/C Clutch Relay Diagnostic, Error 70
A/C Evap. Temp. Diagnostic, Error 71
No Vss Signal Diagnostic, Error 72
Force Motor Current Diag, Error 73
Traction Control Diagnostic, Error 74
Trans System Voltage Diag, Error 75
Fan 1 Diagnostic, Error 77
Fan 2 Diagnostic, Error 78
Trans Fluid Temp. High Diag, Error 79
Trans Shift 'B' Diag, Error 81
Trans Shift 'A' Diag, Error 82
TCC Control Feedback Diag, Error 83
3->2 Downshift Feedback Diag, Error 84
TCC Stuck On Diagnostic, Error 85
TCC Enable Error Diagnostic, Error 90
Shift Light Diagnostic, Error 91
Oil Life Diagnostic, Error 95
Oil Level Diagnostic, Error 96
Vss Signal Diagnostic, Error 97

ECM Constants
Cylinder Volume
Injector Flow Rate
MAP To Enable WOT, (Min)
Cool Thresh For TPS For WOT (HighTemp)
EGR Enable, Min. MAP
EGR Enable, Min RPM
EGR Enable, Max RPM
Fan 1 On Threshold (Low MPH)
Fan 1 On Threshold (High MPH)
Fan 2 On Threshold (Low MPH)
Fan 2 On Threshold (High MPH)
Fan Hysteresis Low Speed (MPH)
Fan Hysteresis High Speed (MPH)
Fan Threshold High Speed (MPH)
Fan 1 On, Oil Temp, (Low RPM)
Fan 1 On, Oil Temp , (High RPM)
Fan 2 On, Oil Temp, (Low RPM)
Fan 2 On, Oil Temp, (High RPM)
Fan Enable, (High RPM, High Oil Temp)
Fan Oil Temperature Hysteresis
Fuel Cutoff Speed
Fuel Resume Speed
Fuel Cutoff, 1st Gear
Fuel Cutoff, 2nd - 6th Gear
Fuel Resume, 1st Gear
Fuel Resume, 2nd - 6th Gear
Error 32, Min Diff. MAP Test Value
Speedometer Scalar
Speedometer Scalar, Fraction
Speedometer Scalar, (Scan Tool)
Speed Pulses Per Driveshaft Revolution
Time Between Pulses For 'Stop'
Min. Coolant Temp. For CAT Protect
Min. Coolant Temp. To Enable C.A.R.S.
Speed Threshold To Enable C.A.R.S.
Speed Threshold To Disable C.A.R.S.
RPM Threshold To Disable C.A.R.S.
%TPS Threshold To Disable C.A.R.S.
MAP Threshold To Enable C.A.R.S.
MAP Threshold To Disable C.A.R.S.
Min. Cool. Temp. for Closed Loop
Min Cool Temp for Closed Loop, Cold MAT
Minimum BLM
Maximum BLM
BLM Cell MAP Boundary Hysteresis
BLM Cell RPM Boundary Hysteresis
PROM ID

Tables
ECM Switch Table
ECM Constant Table
Main Spark Advance Vs. RPM Vs. MAP
Extended Spark Advance Vs. RPM Vs. MAP
Closed TPS Spark Advance Vs. RPM
Minumum Spark Advance Vs. RPM
Max Retard Vs. RPM (In WOT)
Max. Spark Retard Vs MAP
Knock Fast Attack Rate Vs. RPM
Knock Retard Recovery Rate Vs. RPM
Traction Control Spark Retard Vs. RPM
%TPS Threshold For WOT Vs. RPM (High Cool)
%TPS Threshold For WOT Vs. RPM (Low Cool)
Volumetric Efficiency Vs. RPM Vs. MAP
Volumetric Efficiency Vs. RPM Vs. MAP (Ext.)
Injector Offset Vs. Battery Voltage
Low Pulse Width Injector Offset Adder Vs. BPW
%Change To Fuel/Air Ratio Vs. Cool. Temp. at WOT
%Change To Fuel/Air Ratio Vs. RPM at WOT
AFR x 10, Open Loop Vs Coolant Temp. Vs. MAP
Individual Cylinder Fuel Trim (At Idle)
Individual Cylinder Fuel Trim (Off Idle)
IAC Target RPM Vs. Coolant Temp, (In Drive)
IAC Target RPM Vs. Coolant Temp, (In Park/Neut.)
IAC Park Position Vs. Coolant Temperature
Kick Down Up/Down Shift Points
Normal Up/Down Shift Points
Performance Up/Down Shift Points
Torque Converter Release (MPH)
Torque Converter Engage, (MPH)
Main Line Pressure 0 - 64 MPH
Main Line Pressure 64 - 128 MPH
Main Line Pressure Modifier Vs. Current Gear
Line Pressure Modifier In WOT Vs RPM
Down Shift Pressure Modifier 2 -> 1 Vs MPH
Down Shift Pressure Modifier 3 -> 2 Vs MPH
Down Shift Pressure Modifier 4 -> 3 Vs MPH
Kickdown Shift RPM Thresholds
BLM Cell RPM Boundaries
BLM Cell MAP Boundaries
MAF Sensor Calibration Table 1
MAF Sensor Calibration Table 2
MAF Sensor Calibration Table 3
MAF Sensor Calibration Table 4

 

The latest definition file from TunerCat supports the BLM boundry adjustments.

As far as OBDI TunerCat vs. LT1-Edit :

LT1-Edit has a much nicer GUI for editing & displaying tables. However, it is VIN locked to your PCM.

TunerCat is not VIN locked, so you can program any OBDI car.

Jimmy

 

Sorry, I have not used tunercat in a long time, so I didn't realize they were updating it. My bad... :)

 

What a BLM ????

Neal

 

ttt, what in the heck is BLM??

 

BLM Block Learn Multipler (it is also called long term fuel trim)

These are a series of cells in memory that represent any given engine RPM/ load. The numbers in the cells tell the computer how much pulsewidth (for the injectors) to start with. Other things affect the length of the pulsewidth.

The ideal BLM is 128.

I am still learning...............

Neal