WHAT NEXT for My Supra??

Here are some suggestions:

Cam gears
Underdrive pulleys
Electric fans
EGR block off plates
Fuel dampener bypass

Rear strut bar
TRD antisway bars

If you are going to change your boost controller and turbotimer I would recommend the Blitz SBC-iD, Blitz Power Meter and Blitz Full Auto Turbo Timer. The iD meters look much nicer than the old style Blitz meters.

I wouldn't bother with a BOV for now, most single turbo kits come with their own.

Flavio

Speaking strictly on HP mods...

The first things that I would have recommended are Cam gears (I see that you already have those on order), and a fuel controller.

These are your biggest 'bang for the buck' HP mods after those you have already listed. Some people have noted as much as 30rwhp after installation and tuning of a fuel controller like the SAFC or the new HKS unit.

Then, I suppose that you could add electric fans or a lightened underdrive pulley. However, I personally would advise against installing the underdrive pulley based on discussions of the mod on the MKIV list. There have been several cases of members suffering driveline damage that was attributed to using a lightened underdrive pulley. How comfortable you are with taking that risk is a question only you can answer.

Man, it's funny. Guess that I have been around for a long time. I can remember when guys thought that breaking the 400rwhp mark with a BPU car was a big deal and there were only a handful of Single turbo cars across the country. Now, virtually everybody has their sights set on breaking at least 600rwhp+.
lol.

Good luck with your buildup!
Kelly aka KGB