Author Topic: Question on comp cams 12-211-2  (Read 18956 times)

Offline 73c10Shorty

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Question on comp cams 12-211-2
« on: October 12, 2010, 10:57:02 pm »
So I'm getting my stock 350 rebuilt and when I met with the machine shop I asked for some mild performance upgrades. The mechanic suggested I go with an "RV" cam and said it would give me good low end torque and still be streatable. I agreed and we wrote up the rebuild to include this cam. Later at home I looked at the receipt and thought I would research which cam they were installing. After looking up the comp cams 12-211-2 on Summit I'm starting to think this is not a mild cam.

Specs:
Cam Style      Hydraulic flat tappet
Basic Operating RPM Range      1,800-5,800
Intake Duration at 050 inch Lift      224
Exhaust Duration at 050 inch Lift      224
Duration at 050 inch Lift      224 int./224 exh.
Advertised Intake Duration      270
Advertised Exhaust Duration      270
Advertised Duration      270 int./270 exh.
Intake Valve Lift with Factory Rocker Arm Ratio      0.470 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio      0.470 in.
Valve Lift with Factory Rocker Arm Ratio      0.470 int./0.470 exh.
Lobe Separation (degrees)      110
Computer-Controlled Compatible      No
Grind Number      CS 270H-10
Valve Springs Required      Yes

Description:
Designed for hot street/strip cars, these COMP Cams Magnum series cams require a higher compression ratio, rear-end gear ratio, and stall torque converter than stock. With a very aggressive profile, these camshafts provide maximum top-end performance for your high performance car.

Does anyone know much about this cam or have any thoughts or suggestions?
1973 C10 Shortbed, 350/350

Offline screamin86

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Re: Question on comp cams 12-211-2
« Reply #1 on: October 12, 2010, 11:04:39 pm »
The lift and dur are a little higher than what I run and I wouldn't call mine a rv cam but that 110lsa helps bring the power on in a lowe rpm. I run a 214/224 442/465 on a 112lsa in my 357 in my k10 but I run a 2800 stall also. It pulls fine and has plenty of low end I've also only got 3.42 gears with the th350 trans.
86 k10 lwb 4x4:350 .040 214/224 444/466 112lsa performer rpm 1406 lt's summit racing th350 2800stall
03 yukon xl:tint debadge full boltons
86 ta:lm7 hot cam boltons

Offline VileZambonie

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Re: Question on comp cams 12-211-2
« Reply #2 on: October 12, 2010, 11:07:14 pm »
What is it that you are going for? What other things are they doing to the engine?
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline figure843

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Re: Question on comp cams 12-211-2
« Reply #3 on: October 12, 2010, 11:18:43 pm »
you would probably be better off with a 268 or 12-210-2. great low end cam
1984 SILVERADO LWB 350/400
1988 SILVERADO K5 BLAZER 350/700R4/NP208/3:73/6"RC LIFT/38.5/15/15 BOGGERS

Offline 73c10Shorty

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Re: Question on comp cams 12-211-2
« Reply #4 on: October 12, 2010, 11:29:19 pm »
I'm not really sure of the details but they're machining the block and cleaning up the heads, replacing springs, valves, putting in flat top pistons, etc. They're doing a complete long block rebuild. I'm really hoping for at least a noticable increase in hp/torque, but nothing crazy.
1973 C10 Shortbed, 350/350

Offline screamin86

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Re: Question on comp cams 12-211-2
« Reply #5 on: October 12, 2010, 11:33:55 pm »
Know what heads you have?
86 k10 lwb 4x4:350 .040 214/224 444/466 112lsa performer rpm 1406 lt's summit racing th350 2800stall
03 yukon xl:tint debadge full boltons
86 ta:lm7 hot cam boltons

Offline 73c10Shorty

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Re: Question on comp cams 12-211-2
« Reply #6 on: October 12, 2010, 11:42:17 pm »
I believe the heads are whatever came originally with the truck. I was told the motor is all original. I'll call the machine shop in the morning and ask if they know which heads are on there.

I looked up the comp cams 12-210-2 and the description definitely sounds more like what I'm after.
1973 C10 Shortbed, 350/350

Offline VileZambonie

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Re: Question on comp cams 12-211-2
« Reply #7 on: October 13, 2010, 12:37:31 pm »
To really help you out with selecting a cam we need to know at the very least:

Compression ratio, heads, intake manifold, exhaust, transmission, gear ratio, tire size and intended useage otherwise it's a total guess on any suggestion you get.
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline screamin86

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Re: Question on comp cams 12-211-2
« Reply #8 on: October 13, 2010, 01:08:43 pm »
I agree with the above post without all that information its all just a guess! Your heads and compression ratio will take a toll on how it will run.
86 k10 lwb 4x4:350 .040 214/224 444/466 112lsa performer rpm 1406 lt's summit racing th350 2800stall
03 yukon xl:tint debadge full boltons
86 ta:lm7 hot cam boltons

Offline 73c10Shorty

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Re: Question on comp cams 12-211-2
« Reply #9 on: October 15, 2010, 09:48:42 am »
Hey guys, thanks for the help. I don't know some of the information that you asked for so I ended up calling the machine shop and having them go with the 268 instead of the 270. It seems like a safer bet.

What I do know:
Stock heads, stock intake manifold, 2 1/4" exhaust tubing with 22" glasspacks, recently rebuilt turbo 350 tranny, 20' wheels. My truck is a cruiser. I'm not looking to burn our or anything like that. I just would like to feel a little pep.
1973 C10 Shortbed, 350/350

Offline screamin86

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Re: Question on comp cams 12-211-2
« Reply #10 on: October 15, 2010, 10:31:17 am »
yeah make sure to stress on that and tell THEM its a street truck and that you don't want to have to run a higher stall if you don't have to. Unlsee you alread have one that is.
86 k10 lwb 4x4:350 .040 214/224 444/466 112lsa performer rpm 1406 lt's summit racing th350 2800stall
03 yukon xl:tint debadge full boltons
86 ta:lm7 hot cam boltons

Offline figure843

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Re: Question on comp cams 12-211-2
« Reply #11 on: October 15, 2010, 07:54:47 pm »
should not need a stall converter. 268 works well without one. anything bigger and i would say definately get a stall. friends of mine have been very happy with this cam. ;D
1984 SILVERADO LWB 350/400
1988 SILVERADO K5 BLAZER 350/700R4/NP208/3:73/6"RC LIFT/38.5/15/15 BOGGERS

Offline 1980c10

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Re: Question on comp cams 12-211-2
« Reply #12 on: October 15, 2010, 09:02:01 pm »
I would add some headers to this equation, If you haven't already.

Offline 73c10Shorty

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Re: Question on comp cams 12-211-2
« Reply #13 on: October 16, 2010, 01:32:31 am »
Yes, a set of headers is definitely on my wish list. Along with a better intake and carb... but you know how it is... all in time.
1973 C10 Shortbed, 350/350

Offline screamin86

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Re: Question on comp cams 12-211-2
« Reply #14 on: October 16, 2010, 02:14:24 am »
Look around I ended up getting my long tubes from a friend for and old junk qjet carb I had! (No saying qjets are junk it just needed a lot more work than I knew how to do! LoL)
86 k10 lwb 4x4:350 .040 214/224 444/466 112lsa performer rpm 1406 lt's summit racing th350 2800stall
03 yukon xl:tint debadge full boltons
86 ta:lm7 hot cam boltons