how could i tune my c5 to speed density ,is there anyone can explan it to me step by step ,

 

start reading.............



http://www.hptuners.com/forum/

 

Nick, you can probably recite that log page for page!!

 

 

This might help you get an idea. I'm not going to say if this is the best way, or the right way. It's just something I found on the net once.

Step by Step for SD tuning Wideband Method:
1: Unplug MAF sensor
2: Disable the SES lights for MAF codes P0101, P0102, P0103 (No check engine light.) Do not completely disable the codes or the PCM will not fall into SD mode. Only turn off the SES light, DO NOT DISABLE THE CODES THEMSELVES!
3: Change all points to 1.13 in the Open Loop F/A vs ECT vs MAP table (commands AFR of 13.0)
4: Change all points in the Closed Loop Enable Coolant Temp vs IAT table to 250* (Disables closed loop)
5: Copy High Octane table to the Low Octane Table (computer reverts to low octane table when MAF is unplugged, this assure’s optimal timing)
6: Change all points in the Power Enrich Fuel Multiplier vs RPM table to 1.0 (disables PE mode)
7: Use your wideband and HPT histogram to verify AFR of 13.0
8: Make adjustments to the VE table accordingly to dial in a 13.0 AFR using the desired formula - current afr/13.0 = VE multiplier
example: cell @ 1600 rpm Map 50 is showing the air/fuel to be at 11.7 in the histogram. 11.7/13.0=0.9 Lets say that your VE table has a value of 48 listed at 1600 rpm, Map 50. Using the above formula you would multiply that value times (.9). 48*.9=43.2. 43.2 would be your new VE value. Continue using this formula until all data has been plotted.
9: Hand smooth VE as described by Magnus (a smooth VE results in crisper throttle response), upload new .bin and repeat steps 7 and 8 until all cells in the histogram are 12.8 - 13.2.
10: Change all points in Open Loop F/A vs ECT vs MAP table back to stock (re-enable stoich commanded AFR)
11: Change all points in the Closed Loop Enable Coolant Temp vs IAT table back to stock (re-enables closed loop operation and fuel trim leaning)
12: Change all points in the Power Enrich Fuel Multiplier vs. RPM table back to stock (re-enables PE mode)
13: Use wideband and PE table to dial in desired WOT AFR. (Optimum HP at WOT)

 

thanks dude ,i already did it all ,but i missed some in 12-13 ...

 

I think that everyone else is missing one thing.. you want to do a 2 BAR speed density tune right?

You are going to need to buy the credits to license your vehicle for the 2 BAR OS. Instructions on this and its implementation are in the HELP section of HP Tuners software.

You will also need a 2BAR map sensor.

If you have not done this before, start reading. There was thread discussing this very thing on here. If you have not done it before, I would recommend doing a lot of reading before undertaking it.

EDIT.. one more thing. The example above is for a 1 BAR SD tune. DO NOT tune your FI car to 13:1. You will end up with more work ahead of you than a SD tune.

 

thats why Doug at ECS is doing my tune SD 2 BAR, There the experts

 

i already have EFILIVE tune & scan with LC1 AFR senser,is there any can post me efilive file to compare it with my file , i back to maf now, the car run fine but still lean in high RPM.