Engine Finished Now What Do I TWEEC

**bmo37** · #1 (**permalink**) 07-23-08, 09:44 PM

To make a long story short. I built this car back in college and its been sittin in my garage about 90% done until recently I decided to tackle the tuning part with it again. I'm new to the tweecer and would like any pointers/tips where to start. Here is what I did already, I have a feeling im going to need to mod some of the fuel tables a bit but not sure how much or what else to look at as well. Thanks for any help in advance.

1993 Mustang GT
347cid supercharged V-1 with power pipe approx 6-7lbs boost
Edelbrock 5.0 heads with 1.6 rockers and trickflow stage 1 cam.
Typhoon intake, 75mm throttle body, 80mm Pro-m MAF and FMS 42lb injectors

Tune Parameters Changed
Injector Breakpoint function changed to 2.5
Injector Offset vs Battery Voltage function changed for 42lb injectors
MAF Transfer function changed to match 80mm MAF and 42lb injectors
Engine Displacement scalar changed to 346.93
Injector High/Low Slope scalar changed to 42/49
MAF Max/Min Voltage scalar changed to 4.9/0
Sealevel Load Scaling vs RPM function changed
Throttle Body Airflow scalar changed to .72
ISC Drive Idle Airflow function changed to scale multiplied by 1.29

strtrcr50 · #2 (**permalink**) 08-06-08, 11:37 AM

I'd pull some timing and richen up the open loop tables. Also, reduce the time at high load to open loop.

Black1987Stang · #3 (**permalink**) 08-08-08, 08:58 PM

Yeah I would deff pull some timing if you're not using a BTM, which there would be no point since you got a Tweecer anyway...I would highly recommend a wideband, I got the DM100 from PLX Devices Inc. - Custom Digital Gauges, Wideband O2 Air Fuel Ratio, OBD 2, Data Loggers and love it, no one around here has ever seen one like it and it's slick looking and operating. Anyways I would run it open loop all the time, so you know the computer won't be trying to change the fuel tables and for instance make it lean and blow a hg or worse. and you will be able to see the commanded air fuel ratio dead on, since it won't be trying to go to rich to lean as in what it does in closed loop and you didn't say what you put for the load scaling switch and change the load parameters to?