[Gmecm] Tuning a larger MAF on L98

[mp at FlowersByValerie.com (Mike Poore)]

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