i've got an 03' rex wagon. entire exhaust done. completely catless uppipe, downpipe, and back. cold air intake. bov. would like to throw a tune at it but not ready to drop $600-700 on an access port. are there any other alternatives??? also have a greddy profec II installed, but sort of unfamiliar with the terminolagy, so havent done much with it. just looking for any pointers. thanks
Do some research on Enginuity and OpenECU. There are some others, I think, but those are the only two "free" ones that come to mind.
I would try to find a used AP1 (should be able to find plenty for an 03 for a lot less than $600). You can run a base map while you save money for a protune. Or you can sell you bov and boost controller to pay for your protune, because a real tune is a better use for your money IMHO. BOV's are more or less worthless on a WRX unless you are getting close to 400 HP, and are terrible for your car if it is not a recirculating BOV. Boost controllers just make me nervous.