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Old 03-28-2012, 09:12 PM   #1
WFOnMuddy
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Default Summit SUM-1105

Was just wondering if anybodies used this cam before, and how good it is? But my main question is, Is it lopey at idle?? Heres the info on it:

Cam Style Hydraulic flat tappet
Basic Operating RPM Range 2,400-6,000
Intake Duration at 050 inch Lift 224
Exhaust Duration at 050 inch Lift 234
Duration at 050 inch Lift 224 int./234 exh.
Advertised Intake Duration 282
Advertised Exhaust Duration 292
Advertised Duration 282 int./292 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.465 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.488 in.
Valve Lift with Factory Rocker Arm Ratio 0.465 int./0.488 exh.
Lobe Separation (degrees) 114
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Old 03-28-2012, 10:43 PM   #2
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Default Re: Summit SUM-1105

Quote:
Originally Posted by WFOnMuddy View Post
Was just wondering if anybodies used this cam before, and how good it is? But my main question is, Is it lopey at idle?? Heres the info on it:

Cam Style Hydraulic flat tappet
Basic Operating RPM Range 2,400-6,000
Intake Duration at 050 inch Lift 224
Exhaust Duration at 050 inch Lift 234
Duration at 050 inch Lift 224 int./234 exh.
Advertised Intake Duration 282
Advertised Exhaust Duration 292
Advertised Duration 282 int./292 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.465 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.488 in.
Valve Lift with Factory Rocker Arm Ratio 0.465 int./0.488 exh.
Lobe Separation (degrees) 114
The old Crane Blazer with that spec runs good. There are much better grinds out from Crane (Crane's Saturday Night Special, for starters) though
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Old 03-29-2012, 09:36 AM   #3
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Default Re: Summit SUM-1105

Ok, was just wondering cuz a buddy of mine has one and he was going to give it to me, just for a back up. But was thinkin bout putting it in my street car if it was a lopey idle, just for the sound of it for bumpin around town. Thanks.
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Old 03-29-2012, 09:54 AM   #4
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Default Re: Summit SUM-1105

That cam is made for summit, but a very popular grind. I use it on the engine below, 355CI 325+ HP. I sell a few hundred a year and they are great street cams, make good power and vacuum. I have also used the same bottom end with Edelbrock Heads and made 375+HP/400+TQ.

http://high-performance-engines.com/...duct_Code=HP29
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Last edited by Notalent; 03-29-2012 at 09:55 AM.
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Old 03-29-2012, 10:17 AM   #5
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Default Re: Summit SUM-1105

That cam is a mass-produced P.O.S., and you can buy it under 10 other name brands. It's a 30 year old design, and if you got it for free, you still paid too much.
Not only will it not make power, it's not going to have the sound you want either(114 LSA).
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Old 03-29-2012, 10:44 AM   #6
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Default Re: Summit SUM-1105

All my customers love the power and sound it produces....of course we know there are better options for more power/better sound, but it gets the job done for what alot of them are doing with the car. I have been in a few of the local boys cars with this cam in it and they sound great and pack a good punch for a mild street engine.
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Old 03-29-2012, 11:21 AM   #7
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Default Re: Summit SUM-1105

So its not a lopey idle? Well if not, then I'll just put it away for when I build a car for the girlfriend.
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Old 03-29-2012, 11:41 AM   #8
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Default Re: Summit SUM-1105

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Originally Posted by WFOnMuddy View Post
So its not a lopey idle?
A 282/292 seat duration on a 114 LSA is not going to have a lopey idle.

The problem I have with the cam, is it's an honest 40hp down from a modern designed cam of the same duration.
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Old 03-29-2012, 11:49 AM   #9
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Default Re: Summit SUM-1105

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Originally Posted by CamKing View Post
A 282/292 seat duration on a 114 LSA is not going to have a lopey idle.

The problem I have with the cam, is it's an honest 40hp down from a modern designed cam of the same duration.
Does that have something to do with ramp rates?
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Old 03-29-2012, 11:53 AM   #10
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Default Re: Summit SUM-1105

Ok thank you CamKing. I dont know much on the numbers that cams have. Is the 112LSA's better? I have a howards cam thats a 112LSA with a .510 lift I am going to use in my stock car engine.
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Old 03-29-2012, 12:30 PM   #11
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Default Re: Summit SUM-1105

Quote:
Originally Posted by WFOnMuddy View Post
Ok thank you CamKing. I dont know much on the numbers that cams have. Is the 112LSA's better? I have a howards cam thats a 112LSA with a .510 lift I am going to use in my stock car engine.
What's the duration?

In a 350, to get my 224/232@.050" cam to lope, I hade to go to a 108 LSA. A bigger duration cam, wouldn't need to be as tight.
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Old 03-29-2012, 12:31 PM   #12
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Default Re: Summit SUM-1105

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Originally Posted by Stockey-Yockey302 View Post
Does that have something to do with ramp rates?
It has to do with the fact that it's an under area'd 1970's design.
Not enough lift. Not enough area, and too wide of an LSA.
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Old 03-29-2012, 03:17 PM   #13
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Default Re: Summit SUM-1105

The cam card shows duration is 235 and 240 with a lift of .500 and .510 But the website says its a .488 and .500 lift. Would the cam card be showing lift using 1.6 ratio rockers? I'm using 1.5. The part number of the cam is 112601-s. This is going in a .060 over 327 with dome pistons and steel crank with the camel hump heads.
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Old 03-29-2012, 03:38 PM   #14
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Default Re: Summit SUM-1105

Quote:
Originally Posted by WFOnMuddy View Post
The cam card shows duration is 235 and 240 with a lift of .500 and .510 But the website says its a .488 and .500 lift. Would the cam card be showing lift using 1.6 ratio rockers? I'm using 1.5. The part number of the cam is 112601-s. This is going in a .060 over 327 with dome pistons and steel crank with the camel hump heads.
I have no clue why there is a discrepancy, but if the lift is .488/.500 with 1.5s then lift with 1.6s would be .521/.533, not .500/.510
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Old 03-29-2012, 03:45 PM   #15
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Default Re: Summit SUM-1105

Would it be wise to trust the cam card more?
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