Right I'll get straight to it. I have a what the hell kinda question...
Yesterday my s3 sprung a boost leak from the smaller boost pipe of the 2 pipes that come from the resonated hard boost pipe, so as a temporary fix, while my forge one comes, I put a piece of similar internal diameter silicone vacuum hose in its place. It started and revved ok, so I left it at that and went out in another car.
Later in the day I came back and got in mine to take it to the Chinese, and found that under hard acceleration, it boosts to over 20 PSI (the car isn't mapped and normally boosts to 10psi) then drops to 5 psi, then settles at 10psi!!!
What the hell is causing this, what pipe have I replaced and what Damage will this cause to the engine?
When it boosts to 20psi the car feels SOOOO fast! But then almost immediately bogs down and fafs around before settling at 10psi
Again, What the hell?!
Car is a 2000 APY s3 with very few mods and again, it's has not been remapped.