WHATS THE BEST WAY TO IMPROVE IT.

 

Stop SHOUTING, take your dumpvalve off, and order a spare turbo.

If you've got more money to spend, you could stretch that out to "Stop SHOUTING, take dumpvalve off, fit an aftermarket ECU with anti-lag, and then order a spare turbo".

It would probably also be worth paying attention to, and if necessary, improving, your driving technique, especially if you feel throttle response is poor after a gearchange.

 

LOL @ G.M.
Lighter flywheel, lighter drive pulleys, lighter cam pulleys, reduced intake temperatures, left foot braking. That's enough for starters.

 

Just guessing here, but I think you'd also want to plug the hole where you took your dump valve out from? If you leave a hole, you'll have very little boost, a very slightly pressurised engine bay - metered by the MAF - and as a result, a very rich mixture. Just a thought.

 

Yes, of course you would. Where did you get the idea that I inferred that blanking the connections wasn't necessary?