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Garage Helper
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Valve spring specifications
I have been searching and looking for information to be able to check out my valve springs, and have found nothing so far - Porsche WSM or Clarke's or every other place.
Turbo Springs - 86 To be able to check them out I seem to need the installed height and the tension at that spot - or a specific spring tension/weight at a certain height of the spring - Any information will surely appreciated Thanks, Ed.
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now).  UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word Last edited by Cocacolakidd; 10-27-2009 at 08:36 PM.. |
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10-27-2009, 08:32 PM
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Redline Racer
Join Date: Jan 2007
Posts: 2,444
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Does this help?
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1987 silver 924S made it to 225k mi! Sent to the big garage in the sky |
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10-27-2009, 08:38 PM
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Garage Helper
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Yes that is correct - but what is the measured valve spring tension at that spot (in nM.) ??? - Need to know if a spring is weak or worn out so as to know if it's good or toss it out.
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now). UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word Last edited by Cocacolakidd; 10-27-2009 at 09:15 PM.. |
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10-27-2009, 08:45 PM
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Redline Racer
Join Date: Jan 2007
Posts: 2,444
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I've never seen any pressure specs anywhere in the service manual. I guess the only option there is to get a new one and measure it.
Oh, wait. Here's something. VALVE SPRINGS at LINDSEY RACING - Your Porsche Performance Parts Center
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1987 silver 924S made it to 225k mi! Sent to the big garage in the sky |
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10-27-2009, 10:31 PM
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Garage Helper
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Yeah that made my whole day... Wonder why it's not in the Work shop manual or even other places - Oh well it was at LR to be found. Thus saving a much longer search .
Thanks HondaDustR
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now). UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word |
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10-28-2009, 12:10 AM
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Garage Helper
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OK - I finally found the information for the 951 Valve Springs.
Intake: At installed height 40mm+.5mm and 130#Seat Pressure. Exhaust: At installed height 41mm+.5mm and 130#Seat Pressure. Another spot found that both Intake and Exhaust were 41mm +.5 or -.5 at 130# Seat Pressure... Lindsey makes a Racing Valve Spring at 140#seat Press. etc.
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now). UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word |
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11-19-2009, 08:53 PM
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Amatuer Hour Specialist
Join Date: May 2015
Posts: 392
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Anyone know what the seat pressure is for the S and S2 valve springs?
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12-24-2023, 05:24 PM
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ORACLE
