Leaderboard

850-900 isn't too bad, just watch it doesn't climb too far past 1000 on boost. Try adding a bit more cruise timing if you want the egts a bit lower. For example, on my VR Turbo with flat top 8.5:1 forged pistons, I was able to run 40 deg advance at low loads at 80ish mph. That knocked the EGTs down a bit. Stock timing is around mid 30s up there, but is 10:1 CR. There's a fine line with EGTs. Running rich can increase them, running too lean can increase them, you just need to find the sweet spot with the right AFR and timing.

Stealth Racing recently mapped a standard MK5 engine to 290hp. Admittedly it was in a Corrado though, and they did say that was a little higher than what they normally see, but it's possible. 300hp is a stretch without cams and probably a short runner intake. The standard intake is the main bottle neck on this engine.

ive a coil pack and a pair of rear shocks standard ones if you need them

I would say 300bhp is unachievable realistically whilst staying NA, you could spend thousands on bigger cams, bigger valves, higher rpm limit and still make less than 270bhp. Get a supercharger kit, it will end up cheaper than extensive NA mods and make more power than you want. Also a high bhp NA will sacrifice a lot of lower end torque and not be very nice to drive