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Old 12-09-2011, 04:43 AM   #1
ebbett21
 
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How much lope will this cam have

Im purchasing a custom cam for my LS3 its a 227/234 614 612 111 LSA + 2 Advance with a 109 installed intake centreline. Has @ 0.006 59.5 overlap.

Any one would like to comment on how choppy the idle will be?

Wanted a cam that has good torque and a choppy idle.

Cheers
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Old 12-09-2011, 05:20 AM   #2
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I'd say that cam will accomplish what you're looking for. The answer you're going to get here is to pick a vendor, tell them your goals, and have them custom grind one.
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Old 12-09-2011, 04:16 PM   #3
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Quote:
Originally Posted by ebbett21 View Post
Im purchasing a custom cam for my LS3 its a 227/234 614 612 111 LSA + 2 Advance with a 109 installed intake centreline. Has @ 0.006 59.5 overlap.

Any one would like to comment on how choppy the idle will be?

Wanted a cam that has good torque and a choppy idle.

Cheers
how may degrees of overlap does "0.006 59.5" equate?

stock is -11° and smooth... mine is +12° and it is very choppy.
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Old 12-09-2011, 04:23 PM   #4
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How does the choppiness affect the overall engine life?
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Old 12-09-2011, 04:35 PM   #5
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How does the choppiness affect the overall engine life?
Done well, meaning appropriate hardware such as new heads, engine life is unaffected.
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Old 12-09-2011, 04:58 PM   #6
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Wish I knew.... The G6x3 cam I got is a mystery...... no data released
But has a nasty lope
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Old 12-09-2011, 08:21 PM   #7
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Quote:
Originally Posted by Bell040 View Post
how may degrees of overlap does "0.006 59.5" equate?

stock is -11° and smooth... mine is +12° and it is very choppy.
Are the stock numbers at 0.050 ?

Stock has positive overlap at 0.000 and 0.006.
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Old 12-09-2011, 09:22 PM   #8
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I dont know a lot about camshaft terminology or what it all means, here is the cam im getting spec sheet, i asked for area under the curve max torque
and a choppy
Cam Valve Events
0.006
0.050
0.200


Intake Duration - ID
277
227
151

13017R LSL lobe .614"
Exhaust Duration - ED
286
234
155

13160R LXL lobe .612"
Lobe Center Angle - LSA
111
111
111


Intake Centerline - ICL
109
109
109






Intake Valve opens - IVO
29.5
4.5
-33.5

BTDC (- indicates ATDC)
Intake Valve closes - IVC
67.5
42.5
4.5

ABDC
Exhaust Valve Opens - EVO
76
50
10.5

BBDC
Exhaust Valve Closes - EVC
30
4
-35.5

ATDC (- indicates BTDC)
Exhaust Centerline - ECL
113
113
113


Overlap
59.5
8.5
-69

degrees
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Old 12-09-2011, 09:35 PM   #9
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Should sound pretty good with 227/234 @ .050 duration and 111 LSA/109 Int.

Post a video after the install...
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Old 12-17-2011, 08:59 PM   #10
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Quote:
Originally Posted by GEN-IV View Post
Are the stock numbers at 0.050 ?

Stock has positive overlap at 0.000 and 0.006.
I got the stock numbers from this (and I was off a little it is -12°):



http://www.gmhightechperformance.com...son/index.html

OP: look at the overlap column in that table, -12° is stock and +12° is a pretty good lope... someone had a +17° and it was a beast.
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