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08-02-2011, 06:09 PM
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#1 |
 Drives: 2011 SS/RS Join Date: Apr 2011
Location: Kentucky
Posts: 47
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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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08-02-2011, 10:29 PM
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#2 |
 
Drives: 2010 ss rs ls3 red-white rallys Join Date: Oct 2008
Location: Mississippi
Posts: 729
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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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eps cam 226/234 lsa 113+2, bfe 1 7/8 headers, rotofab cai, katech oil pump, 444 rwhp, 411 rwtq, eps tune, Blanchard performance install
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08-02-2011, 10:33 PM
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#3 |
 Drives: 2010 Camaro Join Date: Jul 2011
Location: NC
Posts: 174
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There are many combinations of the 2
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08-02-2011, 10:53 PM
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#4 |
 Drives: 2009 Pontiac G8 GT Join Date: Sep 2009
Location: Victoria, TX
Posts: 52
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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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 2013 Corvette Grand Sport A6 Forged 416, Greg Good ported TFS 255 LS3 heads, ECS NOVI 1500 blower, 222/242 .629/.604 121LSA EPS cam, ARH 1 7/8" headers, NPP exhaust, 747rwhp/709rwtq on 93 octane, no meth, w/stock street manners. 2014 GMC Yukon XL Denali, Air Raid MIT, tuned. 2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph Texas Mile 2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 Texas Mile LS1,LS2,LS3,LS7 Custom Camshaft Specialist |
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08-02-2011, 11:13 PM
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#5 |
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Drives: 2010 ss rs ls3 red-white rallys Join Date: Oct 2008
Location: Mississippi
Posts: 729
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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..
__________________
eps cam 226/234 lsa 113+2, bfe 1 7/8 headers, rotofab cai, katech oil pump, 444 rwhp, 411 rwtq, eps tune, Blanchard performance install
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08-02-2011, 11:17 PM
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#6 |
Drives: 2010 Camaro SS/RS Join Date: Sep 2008
Location: Denham Springs, LA
Posts: 705
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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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