Re: Please explain to me about the turbo
hatrik8 said:
So I'm talking with this friend at work telling how he should boost launch his 05 wrx w/ an auto. He can do that right? It's the same principle as our truck, no? Then I was trying to explain to this other guy at work why the turbo won't spool in neutral, but couldn't convince him.
Why doesn't the turbo spool in neutral?
Its not just the exhaust gas
flow that spools a turbo its
hot/expanding exhaust gasses that spool it up. In neutral theres no load on the engine and no matter how hard you rev it the ECM keeps the mixture fairly lean. In gear the ECM adds fuel since it sees the higherTPS vs the lower RPM so the EGTs go up.
You can spool a turbo in neutral if you retard the timing, richen the mixture up, or use a rev limiter (2 step or "stutter box"). All this does is get more heat into the turbine side by allowing the burning of the mixture in the exh upstream of the turbo but past the exh valve. A small shot of N20 will do the same thing as all the above.
BTW, isnt your friends car the same one that I heard will flag an "abuse" code after so many boosted launches? Seems I remember seeing/reading somewhere that after ~11 boosted launches the ECM kicks on the SES light and when the dealer pulls the codes they get the "abuse code" and the dealer promptly voids the warranty. I might be completely wrong but then again it might be worth checking on.
)