Cams
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Team Owner
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From: Miami bound
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Cams
I've got a line on a couple of cams, but I have no idea how to read the numbers. My car's only mildly modded: Vram, headers, and a tune. Would either of these be worth the trouble to install?
.591 .569 on a 112 or
224/228 .581/.588 114
For that matter, WTF does any of it mean. I know lift/duration/angle, but what does it translate to in the real world? The car isn't a daily driver, but I want to be able to jump in and go whenever I feel the need.
.591 .569 on a 112 or
224/228 .581/.588 114
For that matter, WTF does any of it mean. I know lift/duration/angle, but what does it translate to in the real world? The car isn't a daily driver, but I want to be able to jump in and go whenever I feel the need.
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
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St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Numbers : the first 2 numbers 224/228 are the Intake/Exhaust duration - or how long the intake and exhaust valve are kept open. The larger the number, the more radical (from stock) the cam is.
.591/.569 are the valve lift numbers - or how wide the valves are opened. The real concern with lift is piston to valve interference and spring failure. I'll get back to that in a second.
The 114 is the Lobe Separation Angle. The smaller the number, the more radical the idle (lope) and the less vacuum you have at low rpm. 114 is considered wide, 112 is medium and below 112 is narrow. Unless you love to be shaken and not stirred at idle, stick with 114 or wider.
What does it all mean?
That means it's a small cam
and no, it's not worth installing, IMHO. It also means that those specs would be more at home with a turbocharged motor and not a N/A motor.
EG
.591/.569 are the valve lift numbers - or how wide the valves are opened. The real concern with lift is piston to valve interference and spring failure. I'll get back to that in a second.
The 114 is the Lobe Separation Angle. The smaller the number, the more radical the idle (lope) and the less vacuum you have at low rpm. 114 is considered wide, 112 is medium and below 112 is narrow. Unless you love to be shaken and not stirred at idle, stick with 114 or wider.
What does it all mean?
That means it's a small cam
and no, it's not worth installing, IMHO. It also means that those specs would be more at home with a turbocharged motor and not a N/A motor.EG
Last edited by EG@EnglandGreen; Aug 4, 2005 at 12:00 PM.
Safety Car
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From: Fremont California
Originally Posted by EnglandGreen
Numbers : the first 2 numbers 224/228 are the Intake/Exhaust duration - or how long the intake and exhaust valve are kept open. The larger the number, the more radical (from stock) the cam is.
.591/.569 are the valve lift numbers - or how wide the valves are opened. The real concern with lift is piston to valve interference and spring failure. I'll get back to that in a second.
The 114 is the Lobe Separation Angle. The smaller the number, the more radical the idle (lope) and the less vacuum you have at low rpm. 114 is considered wide, 112 is medium and below 112 is narrow. Unless you love to be shaken and not stirred at idle, stick with 114 or wider.
What does it all mean?
That means it's a small cam and no, it's not worth installing, IMHO. It also means that those specs would be more at home with a turbocharged motor and not a N/A motor.
EG
.591/.569 are the valve lift numbers - or how wide the valves are opened. The real concern with lift is piston to valve interference and spring failure. I'll get back to that in a second.
The 114 is the Lobe Separation Angle. The smaller the number, the more radical the idle (lope) and the less vacuum you have at low rpm. 114 is considered wide, 112 is medium and below 112 is narrow. Unless you love to be shaken and not stirred at idle, stick with 114 or wider.
What does it all mean?
That means it's a small cam
and no, it's not worth installing, IMHO. It also means that those specs would be more at home with a turbocharged motor and not a N/A motor.EG
Thank you for posting 
Le Mans Master
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St. Jude Donor '07
Originally Posted by AU N EGL
EG
What effect do the different cams have on HP vs torque ??
I would prefer to have great low end torque to get out of corners and up to speed vs top end speed.
TIA
What effect do the different cams have on HP vs torque ??
I would prefer to have great low end torque to get out of corners and up to speed vs top end speed.
TIA
Melting Slicks
Joined: Dec 2004
Posts: 2,322
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From: New York NY
Cruise-In VI Veteran
St. Jude Donor '05
http://ls1howto.com/index.php?article=23
here is a good link to explain the basics.
Longer duration (in degrees) will produce more power. Lower lsa will decrease quality of your idle (meaning it will be very choppy and rough) and also increase power.
here is a good link to explain the basics.
Longer duration (in degrees) will produce more power. Lower lsa will decrease quality of your idle (meaning it will be very choppy and rough) and also increase power.
Supporting Tuner
Joined: Sep 2004
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
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St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Originally Posted by AU N EGL
EG
What effect do the different cams have on HP vs torque ??
I would prefer to have great low end torque to get out of corners and up to speed vs top end speed.
TIA
What effect do the different cams have on HP vs torque ??
I would prefer to have great low end torque to get out of corners and up to speed vs top end speed.
TIA
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Verdad Gallardo
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From: East Meadow NY
St. Jude Donor '12
Originally Posted by 03Ragtop
I've got a line on a couple of cams, but I have no idea how to read the numbers. My car's only mildly modded: Vram, headers, and a tune. Would either of these be worth the trouble to install?
.591 .569 on a 112 or
224/228 .581/.588 114
For that matter, WTF does any of it mean. I know lift/duration/angle, but what does it translate to in the real world? The car isn't a daily driver, but I want to be able to jump in and go whenever I feel the need.
.591 .569 on a 112 or
224/228 .581/.588 114
For that matter, WTF does any of it mean. I know lift/duration/angle, but what does it translate to in the real world? The car isn't a daily driver, but I want to be able to jump in and go whenever I feel the need.
The first came looks like it was for a FI car, so probably not a good choice unless you are going that way in the future.
Chris
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
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St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Originally Posted by AU N EGL
What??? You didn't stay at a Holiday Inn Express??? Welll .....
Drifting
Joined: Dec 1999
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From: Central Florida
Originally Posted by EnglandGreen
That means it's a small cam and no, it's not worth installing, IMHO.
EG
and no, it's not worth installing, IMHO. EG
a great cam. Lots of torque at low speeds. I use the car for autocross
and so far I am very happy with it. ( I do have LS6 heads/headers)
Russ
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From: Miami bound
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Originally Posted by Monks
I just installed a 224/228 581/588 114 in my 6 speed FRC and it is
a great cam. Lots of torque at low speeds. I use the car for autocross
and so far I am very happy with it. ( I do have LS6 heads/headers)
a great cam. Lots of torque at low speeds. I use the car for autocross
and so far I am very happy with it. ( I do have LS6 heads/headers)
