eliminate MAF

[GS023]

Anyone know if there is a way to eliminate the MAF on an 89? Thanks

[tequilaboy]

Sure there are lots of ways:

• Unplug MAF and run in default airflow mode with appropriate tuning and error codes disabled. Plan to retune regularly for conditions.
• Convert to Holden 808/$5D code and run SD with your 165 ecm and a map sensor.
• Convert to 730 ecm and memcal and run $8D code with a map sensor.
• Convert to any SD based aftermarket ecm with a map sensor.
• Convert to carburetor or other mechanical method of fuel delivery.

Out of curiousity, why do you want to eliminate the MAF? If it is a concern over replacement cost, flow potential and/or tuning limitations of the factory MAFs, additional alternatives are available.

[GS023]

Originally Posted by tequilaboy

Sure there are lots of ways:

• Unplug MAF and run in default airflow mode with appropriate tuning and error codes disabled. Plan to retune regularly for conditions.
• Convert to Holden 808/$5D code and run SD with your 165 ecm and a map sensor.
• Convert to 730 ecm and memcal and run $8D code with a map sensor.
• Convert to any SD based aftermarket ecm with a map sensor.
• Convert to carburetor or other mechanical method of fuel delivery.

Out of curiousity, why do you want to eliminate the MAF? If it is a concern over replacement cost, flow potential and/or tuning limitations of the factory MAFs, additional alternatives are available.

Just thinking the stock unit is unable to move enough air for a 383.

Thanks

[tequilaboy]

For high flow MAFs there are a couple of options:

You can gut a factory MAF and install in a larger housing as some have done over on TGO and retune yourself as required. The so-called "Mega-MAF" approach.

Or, you could convert to a slot-style MAF installed in a custom housing along with a chip that is tuned appropriately for use with the 165 ecm.

Blowerworks offers such products to facilitate the conversion.

[RUKWKR]

Originally Posted by GS023

Just thinking the stock unit is unable to move enough air for a 383.

Thanks

Seems like I vaguely remember seeing the stock MAF is good up to about 500 hp or so? It would definitely support a 383 or probably just about any natural aspirated displacement. I don't think you'll peg it unless you have a power adder.

I have seen on other boards where people have used MAFs from LS cars (I think they peg around 600 hp), Ford Lightnings, all kinds of stuff. You just have to get the calibration tables right.

[Steve85]

CORKVETTE1 ran 10.2x at 130+ with a 434 through an 85 MAF sensor and 85 computer. He also built the motor for 85vet, a high 10sec 383 running an 85 MAF and computer. Those engines are consuming a lot of air very quickly through their MAF sensors. An identical 434 to Corky's using speed density DFI was no faster.

Anecdotal, maybe, but it's unlikely the MAF sensor will hold back a 383.

[GS023]

Very good information, thanks for the help.