intercooler temps
Submitted: Wednesday, Sep 22, 2004 at 09:57
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Member - Oskar (Bris)
Been doing a bit of reading lately about charge air temps through the intercooler.
This post is in response to an earlier one from RuffStuff re: intercooling
Some of the info seems to indicate the air temps going into the IC, from the turbo compressor, are up around 140dC and are dropped to around 40-50 going through the IC into the intake plenum. (are.com.au)
How can this be, as my non-intercooled turbo diesel manifold temps don't get anywhere near these figures?
At 100-140dC (over the boiling point of
water) you wouldn't be able to hold your hand on the compressor side of the turbo, let alone the intake manifold. I can with ease on
mine.
What gives???
Anybody got any clues?
Cheers
Oskar
Reply By: Member - Chris M (QLD) - Wednesday, Sep 22, 2004 at 10:03
Wednesday, Sep 22, 2004 at 10:03
Depends on a lot of things mate. More fuel, higher boost etc leads to higher temps. My exhaust temps get up to 600 degrees, and that's with an intercooler.
AnswerID:
77399
Follow Up By: Member - Oskar (Bris) - Wednesday, Sep 22, 2004 at 11:13
Wednesday, Sep 22, 2004 at 11:13
Chris
I'm not referring to EGT but about air charge temp (the temperature of the air coming from the turbo to the intake manifold)
Oskar
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Reply By: snowman - Wednesday, Sep 22, 2004 at 11:47
Wednesday, Sep 22, 2004 at 11:47
You must have long arms if you can reach you turbo whilst driving along with the motor under load and the turbo running at full boost.
Or maybe you had your hand on the turbo when the car was idling and there was no turbo boost.
Cheers
Snowman
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77411
Follow Up By: Member - Oskar (Bris) - Wednesday, Sep 22, 2004 at 12:15
Wednesday, Sep 22, 2004 at 12:15
Good point mate, you're correct about the idling bit ... but I doubt that the manifold would cool down that much within about 10 seconds of pulling up. I know the radiator system doesn't.
But whatever the case, I take the point about max charge air temp being reached under maximum boost, exactly when you need max efficiency.
Puts another piece of the puzzle together for me.
Ta
Oskar
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Reply By: Kiwi Ray - Wednesday, Sep 22, 2004 at 14:28
Wednesday, Sep 22, 2004 at 14:28
Hi Oskar
To the best of my knowledge there is no fixed air temp at the inlet manifold the object is to get it as low as possible with the after cooler / intercooler.
It would be difficult to put a fixed rating on it as there are too many vatiables that are not finite, that is ambient air temp, road conditions, the way it is being driven at the time, the load being carried and the condition of the engine.
I hope this helps
Ray
AnswerID:
77427