longer pushrods with 230/232 .592/595 XE-R cam
03-20-2006, 08:56 PM
#1
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longer pushrods with 230/232 .592/595 XE-R cam I have a 230/232 .592/.595 XE-R Comp Cam (not installed yet) and read alot about valve train clatter. I have stock length push rods (7.400) and was wondering if a longer push rod would help. I don't want to put this together and have excessive valve train noise. Any information on this issue would be greatly appreciated.
03-20-2006, 09:12 PM
#2
With stock heads and gaskets, 7.450" pushrods are a more ideal length with an XE-R lobed cam.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
03-21-2006, 06:01 AM
#4
TECH Senior Member
It all depends on your Base circle measurement.
Stock cammed lifters have an average of .100 preload
7.450 might take you over that on some lifts, which is not ideal with big durations.
've been running .060>.080 with 7.425, things are quieter and still leave a little room to breath on pump up at high rpms.
Stock cammed lifters have an average of .100 preload
7.450 might take you over that on some lifts, which is not ideal with big durations.
've been running .060>.080 with 7.425, things are quieter and still leave a little room to breath on pump up at high rpms.
03-21-2006, 07:27 AM
#5
Im running .011 over stock preload. Didnt show any pumpup irregularities on the dyno to 6800. Graph was nice an smooth. Valvetrain is reasonably quiet except for a little sewing machin noise from the dual springs. Much quieter than my f13 with .030 under preload.
