Tuning

Reply Subscribe

Thread Tools

Search this Thread

Aug 2, 2004 | 04:30 PM

#11

Sport Side

Thread Starter

TECH Veteran

iTrader: (6)

Joined: Nov 2003

Posts: 4,397

Likes: 0

From: Tallahassee, FL

thanks for all the help ryan.

The IFR table. is that under Fuel control? Table: Flow Rate vs. KPA?

Aug 2, 2004 | 05:07 PM

#12

therock

TECH Fanatic

iTrader: (2)

Joined: Mar 2004

Posts: 1,816

Likes: 57

From: 30 Miles North of Atlanta

Ryan23. Can you mull over this one?

My 93 Tune Diagnostics Read with a Predator Programmer

The Truck (See Signature) 2003 Z71 5.3 ECSB. Nelson 93 Tune, K&N and SS Silverado exhaust a 160 CFM increase in flow.

Can I improve here. These are WOT runs. Hot Weather.

MAF 30.70 .
Long Term + 2.34%.
Short Term 0%.
Spark I did 4 WOT runs and it peaks to 30.0 and drops between 27.0 and 25.9 before it shifts, it's kind of hard to catch.
O2 readings were 890 to 900 across the 4 banks.
0 Knock all the time.

Thanks,

Aug 28, 2004 | 05:31 PM

#13

Sport Side

Thread Starter

TECH Veteran

iTrader: (6)

Joined: Nov 2003

Posts: 4,397

Likes: 0

From: Tallahassee, FL

Ryan-->

Quote:

When tunning you should use your L-trims to calculate what your IFR number should be. Take a long cruise and log all of your L-trim readout. Average them and multiply it as a percentage to your existing IFR numbers. For example: if your averages for Bank1 come out to +3.2 and averages for Bank2 come out to +3.0 -->avg. those = +3.1, so to richen up the mixture, multiply the IFR table by 96.9% (this will yield a smaller number in the IFR table than when you started) The lower the number in the IFR cells, the richer the engine will run.

I came up with -3.013 for my average L trims. Any clue on how much I should lean out my mixture? Multiply ifr table by 1.1, 1.2,??