Comp LSR Cam
Comp LSR Cam I stumbled upon an article...
http://www.gmhightechperformance.com...t/viewall.html
Where the Comp LSR Cam, 251/267, .624/.624, 115LSA was used.
Has anyone worked with this Cam? How did it perform? What are some good valve springs to support this?
Thanks.
http://www.gmhightechperformance.com...t/viewall.html
Where the Comp LSR Cam, 251/267, .624/.624, 115LSA was used.
Has anyone worked with this Cam? How did it perform? What are some good valve springs to support this?
Thanks.
I stumbled upon an article...
http://www.gmhightechperformance.com...t/viewall.html
Where the Comp LSR Cam, 251/267, .624/.624, 115LSA was used.
Has anyone worked with this Cam? How did it perform? What are some good valve springs to support this?
Thanks.
http://www.gmhightechperformance.com...t/viewall.html
Where the Comp LSR Cam, 251/267, .624/.624, 115LSA was used.
Has anyone worked with this Cam? How did it perform? What are some good valve springs to support this?
Thanks.
The 925's are a better choice if using stock rocker arms. If you look at my Platinum springs and the 925's I think you'll see some stark similarities.
How agressive are the lobes on this cam? I think I found the one that is the next size lower. Car isnt a daily driver..has stock rockers tho.
247/263, .624/.624, 114 LSA, Comp LSR Cam # 54-473-11
247/263, .624/.624, 114 LSA, Comp LSR Cam # 54-473-11
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They use LSL if I'm not mistaken LSR is a series of cams not a lobe.. They are supposed to be easier on springs than XER lobes and more stable while being soft on/off the seat and was designed to be stable while still offering decent lift but not being as aggressive as the LSK lobes. Some people say they are great, while some people say they make similar power to XFI lobes. I don't really know, I don't work in a shop; and I don't see a ton of different combo's. Someone with more valvetrain expertise will be able to tell you more.
Last edited by My6speedZ; Aug 23, 2012 at 10:06 PM.
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exactly. If you are running heavy solid stemmed valves, it's best to run a quality dual valve spring with lsl lobes. If you have lightweight valves and rockers, a good beehive like a comp 26918 or pac 1518 will control the lsl lobes.
Most people will need to run duals.
Most people will need to run duals.
Do you have the PAC springs made for TEA like failed on your heads before? I would replace those as soon as possible. My Platinum springs are $129 shipped and have never failed. They are a drop in installation with your existing components.
You can check them out here. http://www.briantooleyracing.com/660...l-springs.htmlWhatever you do, don't run more than 400 lbs of open pressure if using stock rocker arms. Too much open pressure can damage the valve tips long term.
My Platinum springs are the most durable springs that I've found in my 15 years of building LS cylinder heads. As you may know I'm the former owner of Total Engine Airflow so I have some experience under my belt. You can check them out here. http://www.briantooleyracing.com/660...l-springs.html
Whatever you do, don't run more than 400 lbs of open pressure if using stock rocker arms. Too much open pressure can damage the valve tips long term.
You can check them out here. http://www.briantooleyracing.com/660...l-springs.htmlWhatever you do, don't run more than 400 lbs of open pressure if using stock rocker arms. Too much open pressure can damage the valve tips long term.
Last edited by ramairws6; Sep 12, 2012 at 10:06 PM.
The 926 springs have too much open pressure if using stock rocker arms and will damage valve tips long term if used in a daily driver application.
The 925's are a better choice if using stock rocker arms. If you look at my Platinum springs and the 925's I think you'll see some stark similarities.
The 925's are a better choice if using stock rocker arms. If you look at my Platinum springs and the 925's I think you'll see some stark similarities.
Thanks
Zeke
The valve tips should be flat and smooth, just like stock. With too much open pressure they will start to pit, look uneven, and eventually will stop rotating and have trenches cut into them.
The things that will help prevent these issues is running .630" lift or less with stock 15 degree rockers, running 400 lbs or less open pressure, running stock locks which allow valve rotation, and any type of oil additive that helps flat tappet cams prevent wear. Such as racing oils with zinc, etc.
Obviously running roller rockers will prevent this wear, but the heavier roller rockers need increased spring pressure and increased pushrod rigidity.
Ok I use valvoline vr1 20-50 non synthetic, I have the trunion upgrade and my cam has .624 lift in it. But I do have 405lbs of seat pressure open. Suggestions, recommendations?
You're running good oil with the zinc additives, and I think with 405 lbs open pressure you'll be OK. Just pull a couple of rockers off every winter and make sure the valve tips look OK.