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Old 08-02-2011, 06:09 PM   #1
SSKyle
 
Drives: 2011 SS/RS
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Max duration/lift before PTV issues?

How much duration and lift is tolerable before having PTV problems?

Last edited by SSKyle; 08-02-2011 at 06:10 PM. Reason: With stock set-up (heads and pistons)
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Old 08-02-2011, 10:29 PM   #2
camarohead
 
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member mossman had a 231/243 lsa 115 and he had no issues...good question though..maybe more members will chime in.
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Old 08-02-2011, 10:33 PM   #3
Parapdrapa
 
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There are many combinations of the 2
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Old 08-02-2011, 10:53 PM   #4
Patrick G
 
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On the intake, you can run a 230-231 lobe at a 112 intake centerline (with lift around .600") and maintain .080" P to V clearance. For every degree you advance the ICL or every 2 degrees of additional duration you add, you lose .006" (six thousandths) of P to V clearance.

So if you had a 235 lobe on a 112 ICL, you would have around .068" P to V clearance. A 235 lobe on a 110 ICL would have .055" P to V. Some people have no idea how tight they're running their P to V clearance with cams above 230 in duration on the intake side.
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Old 08-02-2011, 11:13 PM   #5
camarohead
 
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great info...yea i definetly wanted to stay safe on this issue..went with the 226/234 lsa 113..been researching alot and think this will fit my goals..
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Old 08-02-2011, 11:17 PM   #6
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running 228 dur. with .660 lift on a 112+2 without any issues on the intake side.
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