LS2 Cam Questions...
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LS2 Cam Questions...
Hello Everyone,
I recently picked up an Aluminum 6.0L (I would assume its a LS2) that was used in a 4 person Sand Rail, from my local speed shop (MC Racing in KS).
The Sand Rail owner decided to go with a new Tall Deck LSX block from GM and had it built to run a Magnuson style supercharger on pump gas and it put down a traction-limited 892 rwhp on the dyno.
With the new LSX motor in the Sand Rail the owner had no use for the previously installed Aluminum 6.0L (LS2 ?) that supposedly dyno'd over 700 rwhp running the same Magnuson style supercharger, on race gas. He was basically giving it away so instead of building my current LS1 swap, I decided to buy the LS2 from the Sand Rail customer (and will be selling my LS1 shortly).
Upon review of my new purchase we realize that it has nicely ported LS6 (243) heads, with Shaft-Mounted Rockers, and some beefy Valve Springs (unsure of the brand). After digging a little further we notice it has Forged JE Pistons (somewhere around a 7-8mm dish and fly cut valve reliefs cut in them), a Forged Crank, ARP Head Studs and Rod Bolts.
The Heads and Engine are both out getting freshened up (pressure checked, cleaned, new bearings ect), but while it's out I wanted to get some recommendations on what cam to go with. I am going to run a LS6 intake, and reuse my long-tubes. I know there are different types of "lobes" that cams can be made on, and know that some lobes have a more "aggressive" ramp rate and are harder on the valvetrain as well.
I would like to know about your personal experiences (Dyno #'s/ ET's) with some aggressive type cams (MS4, T-Rex, LG G5XE, ect ect) in a 6.0 L LS2 with 243 heads and is there a "Large Cam" that has the Duration and Lift of some of the "Aggressive" cams but that are running the Less-aggressive type of Lobe ?
The car will be my 1978 Caprice 2-Door Coupe, with a TH350 that is shown in my signature, and used primarily for the drag strip, with occasional trips to the local cruise nights.
Thank you in advance for sharing your personal experiences (Dyno #'s/ ET's).
- Henry
I recently picked up an Aluminum 6.0L (I would assume its a LS2) that was used in a 4 person Sand Rail, from my local speed shop (MC Racing in KS).
The Sand Rail owner decided to go with a new Tall Deck LSX block from GM and had it built to run a Magnuson style supercharger on pump gas and it put down a traction-limited 892 rwhp on the dyno.
With the new LSX motor in the Sand Rail the owner had no use for the previously installed Aluminum 6.0L (LS2 ?) that supposedly dyno'd over 700 rwhp running the same Magnuson style supercharger, on race gas. He was basically giving it away so instead of building my current LS1 swap, I decided to buy the LS2 from the Sand Rail customer (and will be selling my LS1 shortly).
Upon review of my new purchase we realize that it has nicely ported LS6 (243) heads, with Shaft-Mounted Rockers, and some beefy Valve Springs (unsure of the brand). After digging a little further we notice it has Forged JE Pistons (somewhere around a 7-8mm dish and fly cut valve reliefs cut in them), a Forged Crank, ARP Head Studs and Rod Bolts.
The Heads and Engine are both out getting freshened up (pressure checked, cleaned, new bearings ect), but while it's out I wanted to get some recommendations on what cam to go with. I am going to run a LS6 intake, and reuse my long-tubes. I know there are different types of "lobes" that cams can be made on, and know that some lobes have a more "aggressive" ramp rate and are harder on the valvetrain as well.
I would like to know about your personal experiences (Dyno #'s/ ET's) with some aggressive type cams (MS4, T-Rex, LG G5XE, ect ect) in a 6.0 L LS2 with 243 heads and is there a "Large Cam" that has the Duration and Lift of some of the "Aggressive" cams but that are running the Less-aggressive type of Lobe ?
The car will be my 1978 Caprice 2-Door Coupe, with a TH350 that is shown in my signature, and used primarily for the drag strip, with occasional trips to the local cruise nights.
Thank you in advance for sharing your personal experiences (Dyno #'s/ ET's).
- Henry
#2
Why would you put on a LS6 intake on a LS2? Just put a ported LS2 intake or a FAST on there.
As far as cams go I have the VRX5 and it's awesome to say the least
236/238 .601/.605 113 LSA
As far as cams go I have the VRX5 and it's awesome to say the least
236/238 .601/.605 113 LSA
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Dyno Thread: Stock LS6 Intake vs Stock LS2 Intake: http://www.ls1gto.com/forums/showthread.php?t=289456
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if it has dished pistons and was used with a supercharger, it probably has low compression... u should address that 1st before a cam... unless u want to use a supercharger also, then low comp will help u...
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There is a lot of buzz right now about Geoff Skinners new lobes from Engine Power Systems (EPS). They are like a marine endurance lobe and easy on the valvetrain but put up numbers like a much more agressive X-ER, LSK lobe etc... The other lobe I would look at is the the Comp LSL lobes that are in Comps LSR line of cams. They are only marginally more agressive than the EPS lobes from what I understand. Both of these lobes are so easy on the valvetrain even at over.600 lift they are compatible with beehive springs which is a really great IMO. There are a lot of advantages to a beehive if you can get away with running them.....
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#9
I think you would do well with the RPM 3 cam from Fran.
This will help.
http://www.youtube.com/watch?v=PtOPy_lp2QY
This will help.
http://www.youtube.com/watch?v=PtOPy_lp2QY
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I fully agree. If you are keeping it NA, you will want more compression. Stock CR on an LS2 is 10.8:1. My new (pump gas) motor is about 12:1. A cam in the mid 230/ low 240 range and .600 + lift would be a good selection for a street/ strip motor. If, however, you are going to go FI, the cam selection would need to be made accordingly.
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I fully agree. If you are keeping it NA, you will want more compression. Stock CR on an LS2 is 10.8:1. My new (pump gas) motor is about 12:1. A cam in the mid 230/ low 240 range and .600 + lift would be a good selection for a street/ strip motor. If, however, you are going to go FI, the cam selection would need to be made accordingly.
Last edited by KC Henry; 05-01-2010 at 08:51 AM.
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I fully agree. If you are keeping it NA, you will want more compression. Stock CR on an LS2 is 10.8:1. My new (pump gas) motor is about 12:1. A cam in the mid 230/ low 240 range and .600 + lift would be a good selection for a street/ strip motor. If, however, you are going to go FI, the cam selection would need to be made accordingly.
I spoke with Geoff at EPS and he will being sending me a Cam package that he recommended to me for use with this set up.
He said it should run very well on the crappy 91 octane that we have here in KC.
#15