Thumper style cam swap gains big on LS2 Vette
04-27-2009, 11:28 AM
#1
Thumper style cam swap gains big on LS2 Vette 2006 C6 LS2 with 4 speed automatic, Kooks 1 3/4" long tube headers with no cats.
Baseline dyno was 386rwhp/376rwtq. These numbers were a little high because the Vette had 2.56 gears and had to be dynoed in 2nd gear. 3rd gear numbers were a little lower, but the speed exceeded the 160mph limit of the MD250 so we had to use 2nd gear for all valid runs.
The customer is not a racer, but he wanted a hard chopping cam that still had good street manners. I spec'd him a 226/238 .598/604" 111LSA +3 advance cam using some new lobes that Comp makes for Engine Power Systems (an LS1Tech sponsor). These lobes work beautifully well with a quality beehive spring. While you could use a PAC Racing 1218 or 1518, our customer wanted to use the Comp 918 beehives. We also added 7.425" pushrods and a fresh timing chain. The sound underhood was amazingly quiet, but the sound coming out back was very choppy. Sounded great!
We also added a Callaway Honker CAI and UD pulley. The graph below will show you that these new lobes really rpm very well. All told, we gained 60rwhp and 14rwtq. I estimate the cam was probably worth 45rwhp of those 60 rwhp we gained. It was a super easy cam to tune and street manners were excellent. I still can't believe how quiet it is underhood. These EPS lobes will make for a nice alternative to enthusiasts how want a cam near .600" lift, but they want to still run a beehive spring. That's exactly what these lobes were designed for.
Baseline dyno was 386rwhp/376rwtq. These numbers were a little high because the Vette had 2.56 gears and had to be dynoed in 2nd gear. 3rd gear numbers were a little lower, but the speed exceeded the 160mph limit of the MD250 so we had to use 2nd gear for all valid runs.
The customer is not a racer, but he wanted a hard chopping cam that still had good street manners. I spec'd him a 226/238 .598/604" 111LSA +3 advance cam using some new lobes that Comp makes for Engine Power Systems (an LS1Tech sponsor). These lobes work beautifully well with a quality beehive spring. While you could use a PAC Racing 1218 or 1518, our customer wanted to use the Comp 918 beehives. We also added 7.425" pushrods and a fresh timing chain. The sound underhood was amazingly quiet, but the sound coming out back was very choppy. Sounded great!
We also added a Callaway Honker CAI and UD pulley. The graph below will show you that these new lobes really rpm very well. All told, we gained 60rwhp and 14rwtq. I estimate the cam was probably worth 45rwhp of those 60 rwhp we gained. It was a super easy cam to tune and street manners were excellent. I still can't believe how quiet it is underhood. These EPS lobes will make for a nice alternative to enthusiasts how want a cam near .600" lift, but they want to still run a beehive spring. That's exactly what these lobes were designed for.
__________________
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.
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.
04-27-2009, 03:36 PM
#2
thats great Pat, Geoff told me about some new ideas he has with cams.
He wants to swap cams in my Nova but with the list of future upgrades I already have to do, he would have me in the 9's and I am trying to get low 10's and stay there for a bracket car with out having to get a license.
He wants to swap cams in my Nova but with the list of future upgrades I already have to do, he would have me in the 9's and I am trying to get low 10's and stay there for a bracket car with out having to get a license.
04-27-2009, 04:47 PM
#5
Honestly, I would not normally have spec'd a split this dramatic, but the customer was very specific about what he wanted the cam to do: Thump hard, but be easy to drive. The strong top-end charge was just a bonus.
__________________
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.
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.
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06-17-2009, 03:55 PM
#12
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Pat i have a thread asking....and then someone else reffered me to you...i dont know a whole lot about the LSX motors since im am jus getting into them...but i have a 05 C6 LS2 an am looking for a cam...i dont want it to be annoying but i do like it a lil loud..and do like the bluh bluh bluh sound lol. it would be going through LG longtubes not sure on the x-pipe yet..and out bullets..some people have pointed me towards the GX5 or GX6, jus looking for some help and imput...thanks alot zach.
06-17-2009, 04:40 PM
#13
Pat i have a thread asking....and then someone else reffered me to you...i dont know a whole lot about the LSX motors since im am jus getting into them...but i have a 05 C6 LS2 an am looking for a cam...i dont want it to be annoying but i do like it a lil loud..and do like the bluh bluh bluh sound lol. it would be going through LG longtubes not sure on the x-pipe yet..and out bullets..some people have pointed me towards the GX5 or GX6, jus looking for some help and imput...thanks alot zach.
__________________
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.
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.
06-19-2009, 08:10 AM
#14
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Hey Pat, I have an LS2 also and was thinking of doing a cam swap in the future. It's DBW, don't know if that makes a difference??? But..I was looking at these Thumper cams. What am I looking at for all the components for the swap? Do you have some suggestions of what manufactures to go with along with part numbers? And approx prices? The car is not a race car, stock LS2 with Edelbrock headers (long tube), GMPP engine controller with factory tune for LS engines. I just want a hard running motor with that cam sound, and want the power there when you step on the pedal. Thanks for your time and input! ....Gary
06-20-2009, 03:48 PM
#15
Hey Pat, I have an LS2 also and was thinking of doing a cam swap in the future. It's DBW, don't know if that makes a difference??? But..I was looking at these Thumper cams. What am I looking at for all the components for the swap? Do you have some suggestions of what manufactures to go with along with part numbers? And approx prices? The car is not a race car, stock LS2 with Edelbrock headers (long tube), GMPP engine controller with factory tune for LS engines. I just want a hard running motor with that cam sound, and want the power there when you step on the pedal. Thanks for your time and input! ....Gary
06-23-2009, 09:15 PM
#17
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Can anyone call Comp and order the "EPS" lobes or are they something special? If they are publicly available, can you post the lobe numbers and specs of the EPS line?
06-23-2009, 09:29 PM
#19
Testing a car in any gear but the one that is 1:1 will skew the numbers. Why would anyone want to do that? You gain torque because of the gear reduction so the HP numbers will be higher. If you did it both runs then it would be a valid comparison but why do it in the first place? Patrick I'm not calling you out on this just curious as to why you would do it in the first place.
06-23-2009, 10:09 PM
#20
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Testing a car in any gear but the one that is 1:1 will skew the numbers. Why would anyone want to do that? You gain torque because of the gear reduction so the HP numbers will be higher. If you did it both runs then it would be a valid comparison but why do it in the first place? Patrick I'm not calling you out on this just curious as to why you would do it in the first place.