Comp vs. FMS
comp has my vote. no other company has the # of track victories comp has.. and i am sure that they have more R&D than cam motion, considering they are a bigger company. dont get me wrong, FMS sells great grinds.
and on a side note, t-rex is a comp cam core...you will be surpised how many sponsers here use comp as opposed to cam motion.
and on a side note, t-rex is a comp cam core...you will be surpised how many sponsers here use comp as opposed to cam motion.
I have a FM11 and GMPP LS6 heads and my car runs 11.49 @ 120 with a 1.6 60 ft. FMS cams make good torque as well as power. This number was run 6 hours after the car cranked so it still needs to be dyno tuned, and some adjustments to the suspension. The tune was a throw in, and the rev limiter was set @ 6200 when the cam pulls to 6600. 
https://ls1tech.com/forums/lsx-parts-sale/286584-futral-motorsports-f13-112-sale.html
Problem solved it you hurry
Problem solved it you hurry
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Joined: Dec 2004
Posts: 881
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A couple of things.
First, the cam is part of an airflow system that includes the heads, intakes, tb, headers, exhaust, etc. The tuners who work on mostly similar engines have a lot of experience in putting together the combination that works. This is the same for hot street LS1, specific class oval and road racing cars, etc.
Second, the other part of the cam is its part of mechanical actuation system with lots of heavy components (lifters, pushrods, rockers, springs, retainers, keepers). Managing the accelerations and forces in this is critical. The major cam grinders have the staff, technology, equipment, and time to make sure their lobes drive this part well. This is a primary advantage of the big cam companies (Comp, Crower, Crane, Isky) IMHO.
Third, you can measure any cam after you get it. There is equipment and software sold to due this. With this info, you could accurately compare cams. This info is generally not published. Isky does post the .100, .200, .300 lift duration, which more than anyone else. Still, not enough.
Fourth, armed with the .006/.015/.020, .050, and .200 durations and the peak lobe lift, you can get a reasonable comparison. Reasonable, not complete. However, close enough that unit-to-unit variations in other components will make as big a difference.
My 2¢
David
First, the cam is part of an airflow system that includes the heads, intakes, tb, headers, exhaust, etc. The tuners who work on mostly similar engines have a lot of experience in putting together the combination that works. This is the same for hot street LS1, specific class oval and road racing cars, etc.
Second, the other part of the cam is its part of mechanical actuation system with lots of heavy components (lifters, pushrods, rockers, springs, retainers, keepers). Managing the accelerations and forces in this is critical. The major cam grinders have the staff, technology, equipment, and time to make sure their lobes drive this part well. This is a primary advantage of the big cam companies (Comp, Crower, Crane, Isky) IMHO.
Third, you can measure any cam after you get it. There is equipment and software sold to due this. With this info, you could accurately compare cams. This info is generally not published. Isky does post the .100, .200, .300 lift duration, which more than anyone else. Still, not enough.
Fourth, armed with the .006/.015/.020, .050, and .200 durations and the peak lobe lift, you can get a reasonable comparison. Reasonable, not complete. However, close enough that unit-to-unit variations in other components will make as big a difference.
My 2¢
David
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Originally Posted by 1QWIKZ
and on a side note, t-rex is a comp cam core...you will be surpised how many sponsers here use comp as opposed to cam motion.
TECH Enthusiast
Joined: Nov 2004
Posts: 659
Likes: 0
From: Red Stick, LA
Originally Posted by DavidNJ
A couple of things.
First, the cam is part of an airflow system that includes the heads, intakes, tb, headers, exhaust, etc. The tuners who work on mostly similar engines have a lot of experience in putting together the combination that works. This is the same for hot street LS1, specific class oval and road racing cars, etc.
Second, the other part of the cam is its part of mechanical actuation system with lots of heavy components (lifters, pushrods, rockers, springs, retainers, keepers). Managing the accelerations and forces in this is critical. The major cam grinders have the staff, technology, equipment, and time to make sure their lobes drive this part well. This is a primary advantage of the big cam companies (Comp, Crower, Crane, Isky) IMHO.
Third, you can measure any cam after you get it. There is equipment and software sold to due this. With this info, you could accurately compare cams. This info is generally not published. Isky does post the .100, .200, .300 lift duration, which more than anyone else. Still, not enough.
Fourth, armed with the .006/.015/.020, .050, and .200 durations and the peak lobe lift, you can get a reasonable comparison. Reasonable, not complete. However, close enough that unit-to-unit variations in other components will make as big a difference.
My 2¢
David
First, the cam is part of an airflow system that includes the heads, intakes, tb, headers, exhaust, etc. The tuners who work on mostly similar engines have a lot of experience in putting together the combination that works. This is the same for hot street LS1, specific class oval and road racing cars, etc.
Second, the other part of the cam is its part of mechanical actuation system with lots of heavy components (lifters, pushrods, rockers, springs, retainers, keepers). Managing the accelerations and forces in this is critical. The major cam grinders have the staff, technology, equipment, and time to make sure their lobes drive this part well. This is a primary advantage of the big cam companies (Comp, Crower, Crane, Isky) IMHO.
Third, you can measure any cam after you get it. There is equipment and software sold to due this. With this info, you could accurately compare cams. This info is generally not published. Isky does post the .100, .200, .300 lift duration, which more than anyone else. Still, not enough.
Fourth, armed with the .006/.015/.020, .050, and .200 durations and the peak lobe lift, you can get a reasonable comparison. Reasonable, not complete. However, close enough that unit-to-unit variations in other components will make as big a difference.
My 2¢
David
More like a buck fifty!
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Joined: Nov 2004
Posts: 659
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From: Red Stick, LA
Originally Posted by cyphur_traq
last time i checked thunder racing had their own lobes, and ground their own cams. so no....its not a comp cam.
Last edited by BBQLS1; Apr 5, 2005 at 08:44 AM.
Originally Posted by BBQLS1
I wouldn't be so sure if I were you.
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Joined: Nov 2004
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From: Red Stick, LA
Originally Posted by cyphur_traq
oh yea? i'm open to new information, i sure don't want to go spreading bad juju. where'd you hear that the T-rex is a comp cam?
I'm sure Comp has someone on their payroll that knows their sh@t with an LS-1. I'm sure that most of all the LS-1 shops use Comp lobe profiles(a few propritery,most not) As the slogan goes.."Comp is the worlds leader in valvetrain technology". If most people knew instead of what they "think" they know..everyone on this board would be surprised.
Thread Starter
Launching!
Joined: Aug 2004
Posts: 297
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From: Memphis, TN
Well I think that I have decided to go with Comp for a couple of different reasons (Most of which are discussed here...)
If the F-13 would have still been on sale I would have just go it and not ever created this thread, but I missed the sale by like 2 days... It just got to me that I know Furtal is willing to sale their cam for $60 less than they advertise and I missed it. I know in the grand scheme of LS1's that $100 is not that much, but I would not mind trying out Comp since they are in my hometown and stuff... I just wanted to make sure that I was not going to far away from what I orginally wanted (F-13).
If the F-13 would have still been on sale I would have just go it and not ever created this thread, but I missed the sale by like 2 days... It just got to me that I know Furtal is willing to sale their cam for $60 less than they advertise and I missed it. I know in the grand scheme of LS1's that $100 is not that much, but I would not mind trying out Comp since they are in my hometown and stuff... I just wanted to make sure that I was not going to far away from what I orginally wanted (F-13).
Thread Starter
Launching!
Joined: Aug 2004
Posts: 297
Likes: 0
From: Memphis, TN
Originally Posted by Unaffiliated Racing
I'm sure Comp has someone on their payroll that knows their sh@t with an LS-1. I'm sure that most of all the LS-1 shops use Comp lobe profiles(a few propritery,most not) As the slogan goes.."Comp is the worlds leader in valvetrain technology". If most people knew instead of what they "think" they know..everyone on this board would be surprised.
Originally Posted by jrp
FM13
.050" 230\232
.200" 151\150
.006" 280\284
comps 3725/3726
.050" 230\232
.200" 151\153
.006" 279\281
.050" 230\232
.200" 151\150
.006" 280\284
comps 3725/3726
.050" 230\232
.200" 151\153
.006" 279\281
Originally Posted by SteelBallz
The guy I know @ Comp is actually their "LS1/LS6 Technical Advisor" or something like that....
Cam installs..true duals..anything?lol