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Turbo; JH or PL?
A quick google if the internet found this.
http://www.aircooledtech.com/port_polish/
Not bad and it looks fairly easy. I am going to try this on the old head of the 8v first. Test the tools and how stable my hand is. Any one got a better link?
>-----Original Message-----
>From: Dan Bubb [mailto:jdbubb@verizon.net]
>Sent: Saturday, January 6, 2007 11:22 AM
>To: 'LEF', 'David Utley', scirocco-l@scirocco.org
>Subject: Re: Turbo; JH or PL?
>
>Improving the exhaust is a particular area where modification can improve a
>turbo's performance.
>A turbo is driven by not only heat input but pressure differential across
>its turbine. Reducing exhaust back pressure improves turbo response and
>compressor outlet pressure with no additional work done by the engine to
>drive the turbo.
>
>But by all means lets not consider the engine and its parts as a system.
>Let's just hang a turbo on there and crank up the boost. Never mind that the
>response is shitty due to exhaust back pressure and that the maximum boost
>the engine can run is limited due to all the heat created by the engine and
>turbo working against multiple restrictions.
>Just turn up the boost until it fails then declare that this crappy VW short
>block can only sustain 200 Hp!
>Yep, you can crank up the boost to make more power. But only to a certain
>level.
>The standard performance improvements for an NA engine apply to an FI engine
>in that they not only improve performance but also allow the engine to
>operate at a higher boost level due to reduced internal stresses and
>internal heat.
>Dan
>
>From: "LEF" <rocco16@sbcglobal.net>
>Sent: Saturday, January 06, 2007 8:18 AM
>Subject: Re: Turbo; JH or PL?
>
> You can add power this way. It's your choice; add 10hp by installing an
>exhaust kit, or do it by turning up the boost by .5psi.
> That's my point.
> (by the way, don't put TOO much faith in hp figures seen in ads for
>aftermarket speed parts....this applies to even our favorite vendors.
>"Where money is concerned, accept no statement at face value.")
> larry
> sandiego16v
>
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