LS3 Corvette aftermarket cam > check these specs please
#1
TECH Fanatic
Thread Starter
LS3 Corvette aftermarket cam > check these specs please
It's not easy getting internal engine questions answered on the Corvette Forum sometimes, so I am coming back to my old reliable LS1 TECH to get an opinion.
I am thinking about replacing the cam in my daily driver 2011 Corvette GS (A6 trans / stock converter).
For any of you folks that are interested in cam numbers, I ask that you look at the comparison below between the stock Corvette LS3 cam and the aftermarket cam specs I am considering.
I am interested spec-ing out this cam on a wide 116.0 LSA which will give a very modest overlap. Even though this cam has a pretty high lift of .610” / .609” and a much greater duration than the OEM LS3 cam, I believe it will have very good idle qualities due to it's modest lobe timing.
With a modest overlap of -5.5 degrees, this cam will idle with a pretty high vacuum signal (at least a better vacuum signal than other similar cams in the 112-114 LSA range).
Just wondering what your impressions are considering the cam numbers listed below?
Thank's
Corvette LS3 OEM Cam:
Duration:
204 / 211
Lift:
.551” / .525”
LSA:
117.5
Overlap:
-27.5
_______________________________________
Custom Grind Cam:
Comp Cams Lobe Numbers:
LSL # 13016 (Intake)
LXL # 13159 (Exhaust)
Duration:
223 / 230
Lift:
.610” / .609”
LSA:
116.0
ICA:
114.0 (2 degrees advance)
Overlap:
-5.5
.
I am thinking about replacing the cam in my daily driver 2011 Corvette GS (A6 trans / stock converter).
For any of you folks that are interested in cam numbers, I ask that you look at the comparison below between the stock Corvette LS3 cam and the aftermarket cam specs I am considering.
I am interested spec-ing out this cam on a wide 116.0 LSA which will give a very modest overlap. Even though this cam has a pretty high lift of .610” / .609” and a much greater duration than the OEM LS3 cam, I believe it will have very good idle qualities due to it's modest lobe timing.
With a modest overlap of -5.5 degrees, this cam will idle with a pretty high vacuum signal (at least a better vacuum signal than other similar cams in the 112-114 LSA range).
Just wondering what your impressions are considering the cam numbers listed below?
Thank's
Corvette LS3 OEM Cam:
Duration:
204 / 211
Lift:
.551” / .525”
LSA:
117.5
Overlap:
-27.5
_______________________________________
Custom Grind Cam:
Comp Cams Lobe Numbers:
LSL # 13016 (Intake)
LXL # 13159 (Exhaust)
Duration:
223 / 230
Lift:
.610” / .609”
LSA:
116.0
ICA:
114.0 (2 degrees advance)
Overlap:
-5.5
.
#2
TECH Fanatic
Thread Starter
Come on folks ... 74 - 88 views, and not one person here has an opinion?
This ain't the old LS1 TECH that I remember
.
This ain't the old LS1 TECH that I remember
.
Last edited by Tin Indian; 08-15-2012 at 11:25 PM.
#6
TECH Fanatic
Thread Starter
Just staying with the stock converter and exhaust.
I was thinking there might be an extra 30 rwhp in this cam with proper tweeking of my Chuck CoW tune.
I was thinking there might be an extra 30 rwhp in this cam with proper tweeking of my Chuck CoW tune.
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#9
TECH Senior Member
iTrader: (35)
With the 223/230 116lsa I'd go with +5/111ICL to get the DCR very close to stock, it should also peak around 300rpms higher than stock.
IMO, I'd rather see you go with a 219(lsl)/226(lxl) 115+3 it'll drive a little better with -7.5* OL, power should peak around 200rpm higher than stock, with a stock DCR.
I'd still suggest at least 3k stall with any cam upgrade, for better performance and driveability, but that your choice if you want to stick with the stock converter.
IMO, I'd rather see you go with a 219(lsl)/226(lxl) 115+3 it'll drive a little better with -7.5* OL, power should peak around 200rpm higher than stock, with a stock DCR.
I'd still suggest at least 3k stall with any cam upgrade, for better performance and driveability, but that your choice if you want to stick with the stock converter.
#10
TECH Fanatic
Thread Starter
99Bluz28 ... I am no expert, but I would think that having a full 5 degrees of advance (116 LSA with a 111 ICL) would be an awful lot of advance.
How would that effect performance vs a cam with lets say 2 degrees of ground-in advance? ... Seems like the majority of the off-the-shelf cams spec'd by various companies usually have about 2 degrees of advance ground-in (no matter what the LSA of the cam is).
I guess having a full 5 degrees of advance might increase Dynamic Compression some, but would having a full 5 degrees of advance hurt idle qualities and maybe reduce the vacuum signal the engine produces?
Thank's,
Ron
#11
12 Second Club
iTrader: (20)
The cam sounds good for stock cam BUT GET ANOTHER TUNER.....
I'd go with a dual spring that will match those lobes an lift for extra insurance. You should always check your springs at the beginning of a season or every couple thousand miles just to be sure. A few hours of your time is better than thousands of dollars for not taking a Lil time. just my .2
I'd go with a dual spring that will match those lobes an lift for extra insurance. You should always check your springs at the beginning of a season or every couple thousand miles just to be sure. A few hours of your time is better than thousands of dollars for not taking a Lil time. just my .2
#12
TECH Senior Member
iTrader: (35)
Thank's everyone for all your input.
99Bluz28 ... I am no expert, but I would think that having a full 5 degrees of advance (116 LSA with a 111 ICL) would be an awful lot of advance.
How would that effect performance vs a cam with lets say 2 degrees of ground-in advance? ... Seems like the majority of the off-the-shelf cams spec'd by various companies usually have about 2 degrees of advance ground-in (no matter what the LSA of the cam is).
I guess having a full 5 degrees of advance might increase Dynamic Compression some, but would having a full 5 degrees of advance hurt idle qualities and maybe reduce the vacuum signal the engine produces?
Thank's,
Ron
99Bluz28 ... I am no expert, but I would think that having a full 5 degrees of advance (116 LSA with a 111 ICL) would be an awful lot of advance.
How would that effect performance vs a cam with lets say 2 degrees of ground-in advance? ... Seems like the majority of the off-the-shelf cams spec'd by various companies usually have about 2 degrees of advance ground-in (no matter what the LSA of the cam is).
I guess having a full 5 degrees of advance might increase Dynamic Compression some, but would having a full 5 degrees of advance hurt idle qualities and maybe reduce the vacuum signal the engine produces?
Thank's,
Ron
#13
TECH Fanatic
Thread Starter
Thank's Bluz & litle88
litle88 ... I was actually thinking of a set PAC 1518 Beehive Single Valve Springs (advertised .. good for .650" max lift) since this cam I mentioned above only has a max lift of .609"
litle88 ... I was actually thinking of a set PAC 1518 Beehive Single Valve Springs (advertised .. good for .650" max lift) since this cam I mentioned above only has a max lift of .609"
#19
TECH Fanatic
Thread Starter
Thank you Brian.
Do you think a set of PAC 1518 Beehive single valve springs will be ok with this cam?
(all bone stock LS3 internals in this 2011 GS)
Do you think a set of PAC 1518 Beehive single valve springs will be ok with this cam?
(all bone stock LS3 internals in this 2011 GS)