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Joined: Mar 2002
Posts: 316
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Joined: Mar 2002
Posts: 316
Ok, called the local tuner shop, Extreme Performance, and they will weld my Aussie bar in, and they have a dynojet dyno w/ wideband 02.

They said $20-30 for the Aussie bar, and $100/hr. for the dyno tuning. I guess that is the going rate. They said the average tune is 45 minutes, but full hour is required.

Ok here is the plan.
Drive to the shop 2 hours early, open hood and let it cool down. Walk over to the Lowes/Mall and hang out.

Hook up the laptop to the OBDII datalogger.
Log the results and see what the wideband 02 is saying compared to the OBDII.

Do three base line runs, how long between runs? 5 minutes?

Adjust the a/f ratio,takes 30 seconds to adjust:
5% MAF voltage richer
5% MAF voltage leaner
10% MAF voltage richer
10% MAF voltage leaner

or should I go 2%, 2%, 5%, 5% because the 02 sensor changes from .92 to .93 with 1-2% adjustments.

Adjust to highest HP across the band
then two more dynos for peak horsepower?

How many dyno runs in an hour: 6, 9, 12?

Should I go in flat -10% across the board, which is my closed loop setting, for 0-1 LTFT,
or
should I go in with the equalizer like settings from my 3 and 4th gear highway runs from 2k-6.8k that I have adjusted the vehicle a/f values to 02 sensor values of .93 or .94 across the rpm band.


98 T-Red Contour LX V6 Mtx 106k miles
9" K&N, Aussie Pipe, Dual Mode Damper, 19lb. injectors, SHM MAFterburner, Ford 9mm Wires, Mystery Mod, ShoShop Off-road Y pipe, Dynomax Resonator and Muffler, 2.5" custom cat-back.
Joined: Mar 2001
Posts: 1,201
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Joined: Mar 2001
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I have a bit of practice at this. First do not dyno your car stone cold for an acurrate air fuel reading. You won't get it. I'm not saying get it hot just barely warm. Set the low throttle to 0 you won't use it. Run a baseline run at all 0's. Then adjust where the dips are. Get the line straight and then shoot for around 12.5:1ish. Do not set the Ne points in 500 increments. I have found this to throw off the process of tuning time and time again. Leave it in the factory 1000 settings. You should be able to get 6 good runs in an hour maybe more. HTH.


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