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In a message dated 96-02-29 02:40:13 EST, you write:
>Is there such a thing as TOO MUCH pressure at the INTAKE MANIFOLD? I
>guess I'm showing (and simultaneously trying to remedy) my ignorance on
>turbos. But what could happen with tons of pressure at the manifold
>(figurative tons, that is. Not literal ones)? Will the intake manifold
>blow off of the head?
You'll get knock cuz you increased the effective compression ratio into the
15:1 range, then rods bearings and or a blown head gasket( massive knock heat
= warped head = blown gasket).....
I can't imagine the head gasket blowing from
>intake manifold pressure? Will that cause too much mass to enter the
>cylinder and blow the head gasket on the piston compression stroke?
>Plus, the compressor won't compress too much unless the turbine is
>receiving too much energy from the exhaust. > == AS IN TOO MUCH DIRECT
EXHAUST TO THE TURBINE, 0 to WG downpipe
> It's a direct mechanical
>correlation. And the prevention of this occurence is the sole task of
>the wastegate, is it not?
That is correct sir.... The wastegate control either by computer (wastegate
freq valve) or mechanical, but that is THE function of the wastegate.....
> So why (Linus) would you need a valve to bleed
>pressure from the INTAKE manifold AFTER the throttle body?
That is the DEFINITION of a Wastegate function..... To put a pop off valve
there also serves no additional purpose, the Wastegate, by definition is a
pop off valve of sorts..... It's function under boost conditions not closed
>reason you need a pop-off valve (which is located after the compressor
>and before the throttle body) is to give the air coming out of the
>compressor and "bouncing" off the closed throttle plate a place to go so
>it doesn't blow up an intercooler or stop the turbo. Is this logic
You got it sir, 1 down a few to go......