Re: Popped

[PDQSHIP@aol.com]

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
throttle....

 >The only 
>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 
>false?  
You got it sir, 1 down a few to go......


Scott