Boost

[Bob Wooten]

thanks Jay, good info.

BW


> [Original Message]
> From: Jay Carter <JayC at RebelRednecks.Com>
> To: <gmecm at diy-efi.org>
> Date: 12/1/00 8:40:26 PM
> Subject: Re: Boost
>
> At 08:23 PM 12/1/2000 -0800, you wrote:
> >I am hoping that one of you GN guys can clear up for me what the
difference
> >is in a Blow off valve & a Waste gate.  the obvious is that the blow off
> >valve is on the "clean" air side & the waste gate is on the "exhaust"
side.
> >my guess is that it has to do with response time issues & volume of air.
> >but as the typical waste gas is an active device & comes on more as the
> >boost comes up.  i would not think that it would happen all of a sudden &
> >something else would have to dump the extra pressure.
> 
> 
> A blow off valve is to bleed air from the compressor spike when you slam 
> the throttle body shut. It's supposed to stop you from damaging your
turbo. 
> However, in talking with people who build turbos and have been in the 
> industry for a very long time, it's their feelings that the blow off
valves 
> available to people like us don't really serve that purpose because they 
> react too slow.
> 
> A wastegate goes in the exhaust stream before the turbo and is used to 
> bleed exhaust gas out of the system as to control your boost level. Most 
> wastegates don't start opening until you get close to the desired level
of 
> maximum boost. If they opened sooner, you would experience lag. Most 
> external gates that I have tested start opening about 5-6 PSI before max 
> boost is reached.
> 
> 
> 
> Jay
> 
> Jay Carter
> JayC at RebelRednecks.Com
> Jay at BoomGames.Com
> 
> TUCB Technologies Corporation
> Senior Editor - BoomGames Division
> www.boomgames.com
> 
>
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--- Bob Wooten
--- r71chevy at earthlink.net
--- 71-91 Camaro


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