Modding first 95 Gt, motor has 90k on it... Looking to put some juice on it to get it alittle faster... Can anyone recomend what size shot.... wet or dry... Full exhaust, and gears are the only mods, and a walbro 255 pump....
If you're going to do it the right way and run colder plugs, less timing, and get it tuned on a dyno with a wideband, I'd say you could use a 150 shot. If you aren't, I wouldn't use anything above a 75.
Wet kits seem to be a bit safer, however, neither kit is idiot proof.
I started out with a 75 dry shot on my car with about the same mods as you. No problems. Ran 2 heat range colder plugs and constantly checked them for detonation. So I upped the shot to 125. Still no problems, plugs were a bit more whiter, but soon after my tranny took a big hit. Try not to peg it off the rev limiter. I ussually hit it off the line after about 3-4k in 1st gear. Use the WOT switch.
You'll want to get the GSS340 Walbro Hi-Pressure 255lph fuel pump. It is specially designed to handle the high-pressure requirements needed with N20, Supercharging...any forced induction application that requires loads of higher fuel.
I had a similar setup I ran 10* base timing. I also had a 255 aeromtvie fuel pump a fuel pressure regulator and dynoed it to get the perfect air/fuel ratio then i ran a little rich. Ran a 150 NX wet shot for 2 years never had a problem. I would agree with hairy canary and get NX 150 wet shot with a WOT switch.