Comp LSK lobes... any info?
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From: Shreveport, LA
Comp LSK lobes... any info? Does anyone have the lobe chart with the new LSK lobes? I've searched the web over and couldn't find anything. My guess is only vendors may have a chart since they are so new.
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From: Working in the shop 24/7
Originally Posted by Beast96Z
Does anyone have the lobe chart with the new LSK lobes? I've searched the web over and couldn't find anything. My guess is only vendors may have a chart since they are so new.
Are these them?
Comp Cams LSK lobes
Lobe#, Dur. @ .006", .050", .200", & Lift w/1.7 rocker
2124 265 215 142 .629"
2125 269 219 145 .632"
2126 273 223 149 .636"
2127 277 227 153 .639"
2128 281 231 156 .643"
2129 285 235 160 .646"
2130 289 239 164 .649"
2131 293 243 168 .653"
2132 297 247 171 .656"
2133 301 251 175 .660"
2134 305 255 179 .663"
2135 309 259 183 .663"
2136 313 263 186 .663"
Comp Cams LSK lobes
Lobe#, Dur. @ .006", .050", .200", & Lift w/1.7 rocker
2124 265 215 142 .629"
2125 269 219 145 .632"
2126 273 223 149 .636"
2127 277 227 153 .639"
2128 281 231 156 .643"
2129 285 235 160 .646"
2130 289 239 164 .649"
2131 293 243 168 .653"
2132 297 247 171 .656"
2133 301 251 175 .660"
2134 305 255 179 .663"
2135 309 259 183 .663"
2136 313 263 186 .663"
Those are them.
__________________
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.
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Compared to an XER, it looks like (on an eyeball basis) for a given duration at .05 the LSK lobes have:
1* more duration at .006
3* more duration at .200
.05" more lift, but the gap decreases in the bigger durations
It would be nice to see duration specs at .400. I wonder if you would see a big increase there.
1* more duration at .006
3* more duration at .200
.05" more lift, but the gap decreases in the bigger durations
It would be nice to see duration specs at .400. I wonder if you would see a big increase there.
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For intake lobes, I look at the duration at .200 and the lift. The lift is head dependent, as many heads only add a small amount over .500, and some start declining above .600 (cast iron SBC Bowtie heads, for instance). The goal is to get there with minimal duration at .020 for solids and .004/6/8 for hyraulics.
For exhaust lobes, I look at the opening ramp. I want to open the valve as late as possible, and then get it open fast. There is a lot of high pressure (around 150psi) air in there, and I want it out before the exhaust stroke).
Unfortunately, these are frequently coupled, except for some racing lobes that have separate intakes and exhaust profiles. The LSK seem to be best in both categories.
Beyond that, you nearly have to rely on the cam manufacturer to have done their homework to create a profile that prevents float with your components (valves, springs, rockers, etc.) and survive your durability requirements (7 second drag race, 500 mile stock race, 24hr endurance race, 150,000 mile street use).
For exhaust lobes, I look at the opening ramp. I want to open the valve as late as possible, and then get it open fast. There is a lot of high pressure (around 150psi) air in there, and I want it out before the exhaust stroke).
Unfortunately, these are frequently coupled, except for some racing lobes that have separate intakes and exhaust profiles. The LSK seem to be best in both categories.
Beyond that, you nearly have to rely on the cam manufacturer to have done their homework to create a profile that prevents float with your components (valves, springs, rockers, etc.) and survive your durability requirements (7 second drag race, 500 mile stock race, 24hr endurance race, 150,000 mile street use).
TECH Resident
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Originally Posted by Beast96Z
Maybe I'll test a 259/263 .663"/.663" 110LSA+2. 
I wouldn't want to take that car through an emissions test though.
Thread Starter
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From: Shreveport, LA
Originally Posted by DavidNJ
If going that big I would consider smaller LSA (106-108) with more retard (say +4). That would make it (259/263 107+4) an oval track cam for 3/8-1/2 mile tracks. A broad (4000-7500) powerband. Lots of thumpa-thumpa at idle.
I wouldn't want to take that car through an emissions test though.
I wouldn't want to take that car through an emissions test though.
No emmisions here, so no need to worry....yet. 
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From: BFE
Originally Posted by Beast96Z
The 106-108 just wouldn't be to friendly in a car that will still be briven on the street. The advance can be considered though to keep the power band in a usable range. 3/8 to 1/2 mile oval would do me no good since I'm only going a 1/4 at a time and straight. No emmisions here, so no need to worry....yet.
No emmisions here, so no need to worry....yet.
Originally Posted by PREDATOR-Z
That is if you stay with MAF tuning, in SD mode there would be no issues
what he said.
__________________
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.
Thread Starter
TECH Veteran
iTrader: (21)
Joined: Apr 2003
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From: Shreveport, LA
Originally Posted by PREDATOR-Z
That is if you stay with MAF tuning, in SD mode there would be no issues
But you know, lots of factory cars run great with speed density tune only. All the Chrysler product and lots of the Holdens. The MAP/O2s/IAT/TPS/ECT sensors do a pretty good job of adjusting for wild swings in the weather without needing the MAF sensor. FWIW, my around town driveability is slightly better with my SD tune than my every day MAF tune. I'm working on that though. I'd like to keep the MAF so I can run a big dry shot, LOL that's about the only reason though.
__________________
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.
