SAFC tuning

i recently installed greddy injectors and a new greddy turbo on my 98 gsx....i have a SAFC and cant fgure out how to tune it correctly.. can anyone point me in the right direction to get it to accordingly... i plan on takin it to a tuner we have down here, but for the mean time i would like to have more understanding on the tuning of this any help would be appreciated...

what sized injectors?

the injectors are.. 550 cc i believe...

IIRC base tune would be -15 across the board and fine tune from there. Do you have a logger?

No its -18%
450/550-1
old/new-1

The -18% should at least offset the inejctor change, and leave you on stock level of tune. It should at least be safe to drive, and run very similar to how it would on stock injectors. But, to actually do some tuning requires a lot more. A logger is very important, and I really can't do without a WBO2 these days... If you can get some decently priced dyno time, you can use thier WBO2. Essentially you adjust the AFC until you get the desired AFR curve across the whole RPM range. For pump gas you typically shoot for 11:1 at max boost until redline. It will be leaner before full boost, naturally. Typically this requires about another 14% fuel removed after injector compensation, but you really should use a WBO2 to get it right. Each car runs a little differently, and a .5 difference in AFR can cause knock problems on some cars. I would use an OBD2 based logger, even if you have to borrow one (dyno operator may have a fairly universal one), to double check that timing is not way out of whack from the reduced airflow signal (via the AFC). And that's about all you can do on this type of setup. :)