Ok so i just purchsed a 96 gxe with an sr20 u12 bluebird boosted in it... car has s3 cams in it, and its got a jwt ecu... its at 9psi now... and i was told by the guy i bought it from that...(car was at 18 psi, he took bc out when he sold it to me) so when i go to put a BC in it again, which will be soon... will i have to get it tuned??

brian crower cams right? no, as long as the maf is reading the air going in its fine the ecu will take care of all changes. all jwt needs to know for their tune is the injector size what maf and the compression. you will be fine. yes the air will move in and out quickly but the piston is what changes the compression. i have 272's with bc springs and retainers so i would just make sure that the springs you have can work with the cams you get.

by bc i mean boost controller, sorry.... ok i was just making sure... im on stock internals... guy had it at 18psi on stock internals and it was fine... i have the s3 jwt cams in it, and its got a z32 maf on it...