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one of the great unwashed
 
patkeefe's Avatar
 
Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,850
Pop off valve blow up

Spent the day getting the CIS sorted in the SC. My daughter and I took it for a test ride. At about 5000 in third at about 3/4 throttle, there was a very loud bang, sudden deceleration, and then it started running agin. Making no power, the boost gauge said 3 PSI, and the AFR was 18:1 or off the scale. So we pulled over. The old CIS popoff valve blew out of my plastic airbox.

Evidently 6 PSI boost is stronger than the epoxy the PO used on the popoff valve. I think I have some 8 PSI Devcon plastic epoxy in the basement.
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Patrick E. Keefe
78 SC
01 Boxster
Old 09-02-2007, 04:16 PM
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Me like track days
 
Craig 930 RS's Avatar
 
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,196
Get rid of that damn box, you don't need it.
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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 09-02-2007, 06:05 PM
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one of the great unwashed
 
patkeefe's Avatar
 
Join Date: Apr 2004
Location: Ringwood, NJ
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Maybe over the winter, I'll get an aluminum airbox. Providing I can find one. Right now, I need to get the car on the track. I'm tired of sorting.
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Patrick E. Keefe
78 SC
01 Boxster
Old 09-02-2007, 06:09 PM
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one of the great unwashed
 
patkeefe's Avatar
 
Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,850
I love Devcon. That stuff is the best.
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Patrick E. Keefe
78 SC
01 Boxster
Old 09-03-2007, 05:11 PM
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