Quote:
Originally Posted by andrew20195
I don't understand why one couldn't just rescale the MAF tables to the new size to continue using both MAF and Speed Density as the stock car.
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End users want the ability to run a BOV without having to recirculated it. Also, companies like ourselves want to be able to run a 4" intake system with our GT30XX turbos without running the small stock MAF housing as a draw through MAF set-up.
With that said, 99% of FI companies run a blow-thru MAF for the reasons listed above. Most of us also weld our MAF housing to the intercooler pipe. We do not want to to run a 3", 3.5", or 4" upper intercooler pipe, just to keep from overrunning the MAF sensor as we up the power. Doing so is plain silly, not to mention the MAF readings totally suck when you run a blow-thru MAF housing larger than a 2.5".
The central TB location on an FA20 engine doesn't allow you to build a proper 3" blow-thru MAF with a straight section that allows for non-turbulent MAF readings. A 2.5" MAF pegs 5 volts at around 260whp on our dyno on pump gas. This is not going to cut it for us. We can go to a 3" to try to achieve 300-350+whp, but the MAF readings will NOT be stable. You'll go around in circles trying to zero in on your fuel trims.
So with that said, what's wrong with a running hybrid MAF/speed density tune?
- Toan