Heat and Turbo performance
Thread Starter
New Member
Joined: Jul 2003
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Heat and Turbo performance
Hi all,
I noticed that after my car has been running for some time it looses a lot of power. I can't feel the turbo kick in. If the car is cold runs fine, the turbo "punches hard". It's chipped with GIAC. Is my turbo going out?
Thanks,
Jimmy
2000 A41.8 MTQS
I noticed that after my car has been running for some time it looses a lot of power. I can't feel the turbo kick in. If the car is cold runs fine, the turbo "punches hard". It's chipped with GIAC. Is my turbo going out?
Thanks,
Jimmy
2000 A41.8 MTQS
Head Cat Herder
Joined: Oct 1998
Posts: 66,550,462
Likes: 103
Actually, all engines like cool air, as it is more dense with oxygen..
The more oxygen you have, the more fuel you can burn. That's the whole point of a turbo and supercharger, it compresses LOTS more air into the combustion chamber than would naturally be sucked in by the piston's intake stroke, especially at low rpms.
Becasue of the insane heat that turbos generate in their operation, and the fact that they superheat the charge air as they compress it, when it's cool out, the intercooler works better, the turbo stays a little cooler, and the engine just runs a little better.
Becasue of the insane heat that turbos generate in their operation, and the fact that they superheat the charge air as they compress it, when it's cool out, the intercooler works better, the turbo stays a little cooler, and the engine just runs a little better.
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If it is a small loss in power I'd agree with these guys...
but if it is real big I'd say you have a different problem. I'm having a problem with the hot weather causing the wastegate to stay open, and the car is a real dog when this happens. The torque command on the VAG was 410 Nm, it was only making peak of 176. The command on the wastegate was also going to max and just sitting there. As it warmed up it would also get a massive case of turbo lag as the controller would push on the valve, and it would suddenly come unstuck. Just came in from changing the N75 valve, hopefully that is it, otherwise I'm looking at a sticky wastegate. The darn thing is so intermittant I figure it will take a couple of days of running it before I know for sure if I got it. Anyway, if you think the power loss is excessive (more than 50% for me) I'd take a look at that.
