First of all I have a mild 383 maf car. I am using arap bin, with 6E xdf. My scanning was done using datamaster, and tuning will be done with tunerpro.

My BLM's at idle 600 RPM's was 160. I believe I need to raise the idle 200 RPM's. Will this help my problem, or do I still need adjustment?

Off idle things look pretty good, just some fine tuning. Cruising at 1300 RPM's the BLM was at 134 which I think is manageable with some fine tuning.

I do not yet have a wide band but I am close to getting one. I have a WOT problem in that I am getting some spark knock. So what I would like to do is add fuel in PE mode, and take a little timing away until I feel the car is right, then I can fine tune with the wideband.

I have been reading like crazy, and have read about starting in the MAF tables. How does one tune this table. I see the maf tables, but how do I tune volts vs. air flow. Data master is only giving me air flow, so is it an educated guess to change this numbers, or am I missing vital information to make the change? I have read maf threads, but still clear as mud.

Also which PE tables should I start with to improve my WOT problem?

Thanks alot,
Craig

 

I don't know jack about mass air flow or TPI computers, but It sounds like you're lean at idle. you don't need to raise rpm...give it more fuel. Don't go into PE until you get a good VE table. (BLM 126-130 throughout). How is the BLM when youre at 2500 rpm allecerating though 2nd? Is that TBI or TPI? Sorry, I'm a truck guy. DO the math and get a good BPC to start from. Just my newbie .02 worth.

-Mechanical issues like intake/exhaust leaks WILL screw the idle and trick the O2/BLM. I know from experience

 

You didn't list any specs for your engine. The idle blm could be cam related or a mechanical problem.

The MAF bins have a airflow limit table based on RPM. With a bigger engine this table will limit fuel and needs to be adjusted.

There are several MAF tuning stickies up top and some references to some zips with more info.

I wouldn't use the ARAP spark table in a 383.

 

In order to "richen" it up a little at idle, add airflow to the MAF table 1 (at the airflow your engine idles at, and above and below that flow). The computer sees voltage at the MAF, looks up what that should be for airflow, then calculates fuel PW (using injector flow, AFR, and airflow). More air in MAF table = more fuel with '165 $6E.

When you start to change the airflows that are at the top or bottom of each of the MAF tables, you have to change the MAF scalars.

The XDF that I gave you automatically calculates the MAF table flows based on scalars, such that if you change the scalars, all the values in the MAF table will appear to have changed. You'll want to un-change them a little (use notes of what airflow vs volts works for BLM 128, etc..), and then blend the MAF table above such that the bottom number of the higher table matches the top number of the lower table.

MAF is funnnn...

 

The main reason why I wanted to bump the idle up a little was because of the cam. Plus I have underdrive pulley's and the alternator doesn't charge as well.

Anyways, so what i need to do is record the airflow at idle. Then change the voltage above and below that value??

 

post your setup -cam info