Are LSK Lobes Compatible with 1.8 rockers
08-19-2005, 08:18 AM
#3
That's some really, REALLY fast valve action. I guess with the right spring setup, anything is possible. My biggest concern is weight. The LS7 1.8 rockers might make it OK, but I'd be a little gun-shy about running the heavy Crane 1.8s with LSK lobes. Hope your heads flow well in the .700 lift range.
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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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
08-19-2005, 08:41 AM
#4
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I don't think any hydraulic lifter will be able to see over 6500 rpm with that kind of lift but I could be wrong. Personally, I wouldn't try it, seems as though others are having a hard enough problem getting them to work with 1.7's. Now if you are not using hydraulic lifters then that's a whole different ball game.
08-19-2005, 12:42 PM
#6
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The Morel hydraulic lifters are only rated to handle .670" lift so I would guess w/ LSK lobes and a 1.8/1 rocker ratio you would need a solid lifter setup, but I bet there will be some new hydraulic lifters out in the near future that can handle more lift due to the capabilities of the LS7 heads. I'm using Morel lifters on my LSK lobed cam but with a 1:7/1 ratio Jesel rocker
08-19-2005, 07:00 PM
#7
Originally Posted by stang killer
why would you need that much lift, just curious.
An example is the LS7 which has a 211deg intake and a 230 exhaust with 120+ separation. The best possible with emissions contraints. Since we don't have to warranty that the valve springs will last 100,000 miles for emissions, we can use a cam that the factory won't.
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08-19-2005, 07:05 PM
#8
Originally Posted by Patrick G
Hope your heads flow well in the .700 lift range.
Peak flow is really not an issue unless you get a serious airflow problem. The cam has more duration at .6, .5, .4, .3...all of which count more.
Part of me still thinks I would be happier with a modified regular C5 or C6.
