[Gmecm] Tuning a larger MAF on L98

[Mike Poore]

The sensor is about 6-8 inches from the plates. Actually, it is almost 
exactly in the stock location.

Programmer wrote:

>How far is the sensor from your throttle plates ?
>
>Lyndon.
>
>----- Original Message ----- 
>From: "Mike Poore" <mp at FlowersByValerie.com>
>To: <gmecm at diy-efi.org>
>Sent: Monday, September 26, 2005 11:50 PM
>Subject: [Gmecm] Tuning a larger MAF on L98
>
>
>  
>
>>I have a heavily modified 85 L98 engine. I fabricated a new MAF housing 
>>and ducting from the throttle body to the air cleaner. I removed the oem 
>>sensor from its housing and installed it in my fabricated one. I don't 
>>have the exact measurements handy, but the new MAF will flow about 
>>double the stick unit. The engine idles well, but has a severe 
>>hesitation when opening the throttle. The faster you open the throttle 
>>the worse the hesitation. Obviously, it needs more fuel, but what is the 
>>best way to compensate?
>>
>>1. Increase fuel enrichment, or
>>2. Modify the MAF to better reflect actual flow.
>>
>>I have Mastertune and GME for editing. I am trying to figure out what 
>>exactly I need to change to get more fuel when the throttle opens. Any 
>>advice?
>>
>>I looked at modifying the output of the MAF. My understanding is that as 
>>airflow increases, so does voltage. If the new MAF housing has fifty 
>>percent more area than old, how much do I raise the voltage? Any 
>>suggestions on how to send a voltage to the ecm that more accurately 
>>reflects air flow. Ideally, something adjustable would be great. I wish 
>>I knew more about electronic circuits because this is probably very 
>>easy. I also think that this would the better approach because it should 
>>not require so many other prom agjustments.
>>
>>Thanks for any input,
>>
>>Mike
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>>Gmecm mailing list
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>>    
>>
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