View Single Post
  #3 (permalink)  
Old February 13th, 2005, 12:13 PM
Razor's Avatar
Razor Razor is offline
Forum tech Advisor
 
Join Date: Jul 2001
Location: Tampa,Fl
Trader Rating: (5)
Posts: 9,079
Tuning

If you've made it this far, set the gain knob on the controller to 1/2-3/4 of its limit. Leave the internal controls on the PAC alone. And take the car out on its maiden voyage at "The Track"

One thing that can be done is while the engine is hot, if you press the "test" button you will notice the scanmaster numbers jump into the 800's.

Now..
While driving, build boost slowly and watch the needle on the boost guage start to increase. As it sweeps past the 4-5 PSI mark, the "turnon" LED will illuminate indicating the signal from the MAP has been recieved. As the boost rises you'll also note the "Power Injection" bulb will also increase its illumination. Note there are no hesitations, surging, or other drivability issues. The motor should feel silky smooth as if nothing was happing. If so monitor your knock guage and increase the boost level.. if everything works as planned, you should be running the boost you ran previously without.

Next if zero knock was displayed, increase the boost on the motor. Repeat your steps down the track.. and keep increasing boost till you reach "your" comfortable level. Everyones comfortable level is different

Lets say your goal is 23 PSI, work your way from 16 to 23 gradually by increasing boost levels. Now while the motor is at WOT you'll notr the O2 readings on your scantool. Typically I shoot for upper 700's top of third gear. This provides lots of cushion/space for mistakes. The controller will increase adding alcohol the more boost the MAP see's. This keeps you from constant adjusting.

More than likely, you'll max out the boost rod on the turbo before you'll see 23 PSI unless using an external gate, heavy duty actuator, bleeder(boost controller), or an electronic boost controller.

Now your at 23 PSI.. your target.. we'll look into making the most power at this boost level.

Next is lets look into the timing and fueling. if the O2's displayed show a pattern of 760-770-780-770-775.. leave the fuel pressure/fueling adjustmenst alone in the chip.

Now lets advance timing on the chip. Do this in small increments a few degree's at a time. Repeat testing watching for knock activity. On the TT chip one can advance the 1-2 timing, as well as the 3-4 timing. Advancing timing will make more power. Tho for a street application, the more timing run, the less cushion there is for knock.

Watch your timeslips for MPH increases. If the MPH is going up.. your making more power. If the vehicle has terrible traction, disreguard ET. Tune for most MPH. And most MPH increase from the 1/8 mile to 1/4 mile.

Most of the cars I have installed kits on and tuned, the factory presets I have made inside the controller has worked out perfect. Dont ask how I came up with this

Next is kit specific tuning on my system.

Lets say your at 23 PSI boost and you advanced the timing to 26 degree's in first/second gear and now your experiencing some knock activity. Increase the blue gain knob on the controller. Perform another run.. if you find that maxing out the blue gain knob there is some knock activity and want more alcohol sprayed into the motor, go into the controller and advance the "Initial" knob from the factory preset of 11:30 to the 1'oclock position. Now back off the blue gain knob back to the 1/2-3/4 setting and give that a whirl. That will make the ramp of alcohol into the motor more aggressive. And work form there. Now that more alcohol is being introduced into the motor, more than likely it will need fueling pulled out.

Fuel can be reduced by various means. My prefered method is within the chip. Place the chip into programming mode and trim fuel.

Keep repeating steps until proper fueling achieves the most MPH increases and et reductions.

This takes work, being methodical, patience.. Thats the fun part.

If using an EGT, shoot for low 1500's pre-turbo.

If using a Wide Band sensor, shoot for a target of 11.8-12.0 which is sometimes difficult with our cars due to the MAF and ecm. Typically 11.5-12.0 you'll be fine. If a specific number..11.9-12.0 is my own preference.

On a scanmaster.. 770-780's

On Direct Scan, watch the pattern from the O2 sensor in scope mode after a run, and watch the O2's coming down into the 770-780 range.

All this time monitoring for zero knock top of third. Any knock activity, increase alcohol volume.
__________________
89 TTA Stock appearing
10.550 at 132.22 1.539 60ft 3850 race weight w/driver
Always on 93 octane
www.alkycontrol.com
727-570-9999
Reply With Quote