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Me like track days
 
Craig 930 RS's Avatar
 
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,196
Devierter valve tests - Forge brand vs plastic -

http://www.s4biturbo.com/art-dvtests.php
http://www.s4biturbo.com/art-dvtests2.php
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 04-19-2008, 12:49 PM
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Wow, interesting! Thanks for posting that!
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'77 S with '78 930 power and a few other things.
Old 04-19-2008, 02:16 PM
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Me like track days
 
Craig 930 RS's Avatar
 
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,196
Those stock valves failed on my wife's 1.8 200+HP Turbo -
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 04-19-2008, 02:25 PM
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Yeh, when the motor itself was complete, I collected all the new parts (including the Kokeln) in the garage to take to the wrench. I held the plastic Bosch valve it came with in my hand for a few minutes looking at it, thinking about all the opinions I'd read of them, and how long they last.

Then I switched the light off, went inside and bought a Forge one from Ebay... Much happier with that choice.

The analysis on the web site is interesting, but I gotta wonder - even if the Forge takes more vacuum to competely activate due to the design, intuitively I don't see this as much of an issue, simply due to how much air these cars move.

And being able to dissemble it completely in 15 seconds, inspect, re-grease and re-fit is priceless...
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'77 S with '78 930 power and a few other things.
Old 04-19-2008, 03:01 PM
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