I have a tune for my z31 that uses a z32 maf and 1000cc injectors.
The tune was done a draw-through setup with the stock z32 MAF housing (3") diameter.
I have recently changed my setup to a blow-through setup and purchased a solid z32 maf housing at 2.75" diameter. I chose the 2.75" diameter so that it directly matches my throttle body.
I understand that there could be a need now to adjust some values to accommodate the smaller diameter.
Going from 71.5mm (2.8") ID to 63.5mm (2.5") ID was a 11.1% change.
Can anyone comment on this setup or give some advice on what I may need to do?
Here are pics of the setup
![Image](http://img.photobucket.com/albums/v334/amreboot/Z31%20Motor/IMG_9335_zpsecb2922d.jpg)
![Image](http://img.photobucket.com/albums/v334/amreboot/Z31%20Motor/IMG_9334_zps03b05974.jpg)
![Image](http://img.photobucket.com/albums/v334/amreboot/Z31%20Motor/IMG_9332_zpsc7d323c1.jpg)
Here is a pic of the z32 N62 MAF housing
![Image](http://mrpmachineshop.files.wordpress.com/2013/01/p1040632-480x360.jpg?w=640)
A link to the manufactures website: http://mrpmachineshop.com/2013/01/26/an ... inity-j30/
Thank you!
Alex