What would i need to do to be able to run a 75 wet shot of nitrous on my rx8??? like besides changing out the jets cause i've searched and read that i could only run a 55 without problems.

Search for aritlces by Charles Hill in the aftermarket performance section regarding Nitrous use and the limits on a stock RENESIS.

Hi says that he already did,
Bedsides there isn't much you can do without an after market EMS to control the ignition. If you do have one, you need to configure it to retard your ignition while spraying the Nitrous, but I can't remember by how much. You may have to retard it a safe amount and test run it while gradually advancing it from that point, or go into the tread titled "Nitrous" By Charles R Hill, and find it there. I believe he was talking about the proper figures.

Oh and welcome to the forums

No one knows the exact numbers because no ones done it, yet. CHR is working on a 150 shot as we speak.

You MUST get an aftermarket EMS in order to run anything more than 65-shot, so you can enrich fuel delivery and retard ignition.

^Correct. I thought he said dry shot. My badd