| With a mustang dyno aren't you suppose to add 15% or something?   I am assuming what Ash means by restrict airflow is that the greddy's have a lot of pressure drop.   It probably wouldn't hurt to go with a dual intake setup.  Also with a custom tune I am sure you will find A LOT more power.  That seems really low with 530bb's at 18psi. 
 '91 TT Project build: In progress  |