Who has this cam 228/236 115? what does 115 mean?
03-24-2008, 12:05 PM
#1
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Who has this cam 228/236 115? what does 115 mean? I plan on putting this cam into my car but i don't know what this means. Where will it make its power and how does it idle?
03-24-2008, 12:12 PM
#2
115 lsa will idle smooth but will make peak power a lil higherthan a 112 in the rpm band...its not a cam id put in my daily driver cuz i like a lil more usuable power and hate spinning a stock bottom end to 6500 to go fast...
03-24-2008, 12:13 PM
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BTW - I'm thinking about using a cam like that in my SS
03-24-2008, 12:18 PM
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what do you mean by usable power? I would have to spin my bottom end fast in order to go fast. I would like to mention it is going into a lq4 with L92 heads unported and unmilled witha l76 intake.
03-24-2008, 06:04 PM
#5
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In a nutshell 115* is the lobe separation angle, or the distance between Exhaust Closing and Intake Opening. 115 is a on the wide side, depending on where you want you power to peak. It will have just 2 degrees of overlap, so it should idle rather smooth, especially in a 6.0L.
You may be better off defining your entire setup and asking for a cam recommendation. That cam is a good first stab for an L92 head combo, but I'd look for 113* LSA and install it 2* advanced to bring the power peak down over what you listed initially.
In a nutshell 115* is the lobe separation angle, or the distance between Exhaust Closing and Intake Opening. 115 is a on the wide side, depending on where you want you power to peak. It will have just 2 degrees of overlap, so it should idle rather smooth, especially in a 6.0L.
You may be better off defining your entire setup and asking for a cam recommendation. That cam is a good first stab for an L92 head combo, but I'd look for 113* LSA and install it 2* advanced to bring the power peak down over what you listed initially.
03-24-2008, 10:34 PM
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The combo is a lq4 stock block, with l92 unported unmilled heads and a l76 intake, stock rockers, stock lifters, stock oil pump, stock rods, headers from street and performance and the cam above. Im looking or hoping to make around 440-460 to the wheels and i would like to know if it maybe achievable with this setup with a 4l60e behind it.
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03-25-2008, 12:25 AM
#9
I don't think that the stock LQ4 bottom end is going to help you. You're going to need some compression to make that work, at least 11.0 on that wide LSA, but you could tolerate even more.
You might make those numbers through an M6, but not a 4L60. If you want 460 though an A4, put a 4" crank in there to make it a 402-408.
You might make those numbers through an M6, but not a 4L60. If you want 460 though an A4, put a 4" crank in there to make it a 402-408.
03-25-2008, 04:46 AM
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The 115 is the lobe separation of the cam.. With a 115LSA it should have a some what smooth idle. I have a 114LSA cam. click on the link below if you wana here what it sounds like.
03-25-2008, 07:39 AM
#11
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There is some misinformation posted here.
The 228° is the intake duration in crankshaft degrees, and the 236° is the exhaust duration in crankshaft degrees. Both of these are measured at .050 lift of the tappet (lifter). Since the cam turns at 1/2 the crankshaft rpm, the actual rise on the cam lobe uses less than 180° of the total lobe. At .050 lift, it is actually 114 camshaft degrees and 118 camshaft degrees.
The 115 is the Lobe Centerline Angle or commonly Lobe Separation Angle, which is the angle between the centerline of the intake lobe and the centerline of the exhaust lobe measured in camshaft degrees. This is the only camshaft parameter measured in camshaft degrees.
As to what results you will get from that cam, I'll leave that to others because I don't know enough about your vehicle/engine combination to tell.
Here's a pic from Comp Cams catalog.
The 228° is the intake duration in crankshaft degrees, and the 236° is the exhaust duration in crankshaft degrees. Both of these are measured at .050 lift of the tappet (lifter). Since the cam turns at 1/2 the crankshaft rpm, the actual rise on the cam lobe uses less than 180° of the total lobe. At .050 lift, it is actually 114 camshaft degrees and 118 camshaft degrees.
The 115 is the Lobe Centerline Angle or commonly Lobe Separation Angle, which is the angle between the centerline of the intake lobe and the centerline of the exhaust lobe measured in camshaft degrees. This is the only camshaft parameter measured in camshaft degrees.
As to what results you will get from that cam, I'll leave that to others because I don't know enough about your vehicle/engine combination to tell.
Here's a pic from Comp Cams catalog.
03-25-2008, 05:58 PM
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03-25-2008, 06:01 PM
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There is some misinformation posted here.
The 228° is the intake duration in crankshaft degrees, and the 236° is the exhaust duration in crankshaft degrees. Both of these are measured at .050 lift of the tappet (lifter). Since the cam turns at 1/2 the crankshaft rpm, the actual rise on the cam lobe uses less than 180° of the total lobe. At .050 lift, it is actually 114 camshaft degrees and 118 camshaft degrees.
The 115 is the Lobe Centerline Angle or commonly Lobe Separation Angle, which is the angle between the centerline of the intake lobe and the centerline of the exhaust lobe measured in camshaft degrees. This is the only camshaft parameter measured in camshaft degrees.
As to what results you will get from that cam, I'll leave that to others because I don't know enough about your vehicle/engine combination to tell.
Here's a pic from Comp Cams catalog.
The 228° is the intake duration in crankshaft degrees, and the 236° is the exhaust duration in crankshaft degrees. Both of these are measured at .050 lift of the tappet (lifter). Since the cam turns at 1/2 the crankshaft rpm, the actual rise on the cam lobe uses less than 180° of the total lobe. At .050 lift, it is actually 114 camshaft degrees and 118 camshaft degrees.
The 115 is the Lobe Centerline Angle or commonly Lobe Separation Angle, which is the angle between the centerline of the intake lobe and the centerline of the exhaust lobe measured in camshaft degrees. This is the only camshaft parameter measured in camshaft degrees.
As to what results you will get from that cam, I'll leave that to others because I don't know enough about your vehicle/engine combination to tell.
Here's a pic from Comp Cams catalog.
03-25-2008, 07:00 PM
#16
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