can someone explain the specs on a cam to me please.
10-25-2002, 02:44 PM
#1
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can someone explain the specs on a cam to me please. what each number means and how it effects the car, like ive said before im semi-new to all of this and want to learn more. thanks in advance.
10-25-2002, 03:36 PM
#2
Re: can someone explain the specs on a cam to me please. Most people here post cam specs in the following fashion:
A/B//C/D//E
ie.
230/234//564/572//114
where
A=Intake duration
B=Exhaust duration
C=Intake lift
D=Exhaust lift
E=Lobe seperation
Hope this helps <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
A/B//C/D//E
ie.
230/234//564/572//114
where
A=Intake duration
B=Exhaust duration
C=Intake lift
D=Exhaust lift
E=Lobe seperation
Hope this helps <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
10-25-2002, 03:46 PM
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Re: can someone explain the specs on a cam to me please. Generally higher duration numbers move the powerband up. Generally they give a worse idle quality and worse emissions.
Lift doesn't effect idle quality, but higher lift requires better valvesprings and valvetrain.
Numerically higher LSAs (lobe seperation angle) idle better than lower LSAs, but they shift the powerband up slightly.
So you can expect a 218/218 114 to idle about like stock and make power all over, while a 226/226 112 is going to idle worse, may or may not pass emissions, but make a good deal more power high in the rpm band which is where you'll be when you're racing.
J.
Lift doesn't effect idle quality, but higher lift requires better valvesprings and valvetrain.
Numerically higher LSAs (lobe seperation angle) idle better than lower LSAs, but they shift the powerband up slightly.
So you can expect a 218/218 114 to idle about like stock and make power all over, while a 226/226 112 is going to idle worse, may or may not pass emissions, but make a good deal more power high in the rpm band which is where you'll be when you're racing.
J.
10-25-2002, 03:53 PM
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Re: can someone explain the specs on a cam to me please. thanks very much guys, i appreciate it. so what cam would you recommend that would sound good and create a decent amount of power on an 01' a4 ls1 with stock programming?
10-25-2002, 05:12 PM
#5
Re: can someone explain the specs on a cam to me please. </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by v6undercover:
<strong>a4 ls1 with stock programming?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Unfortunately those two do not go hand-in-hand very well. Going with a cam that is not to close to stock makes hard to get it to idle smoothly with stock programming.
<strong>a4 ls1 with stock programming?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Unfortunately those two do not go hand-in-hand very well. Going with a cam that is not to close to stock makes hard to get it to idle smoothly with stock programming.
10-25-2002, 05:22 PM
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Re: can someone explain the specs on a cam to me please. as long as it idles period i will be happy, i will get a program for it probably not even a month after the cam but im on a tight budget... how would one go about acquiring a proggy for his car if he were to get a cam?
10-26-2002, 09:23 AM
#7
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Re: can someone explain the specs on a cam to me please. Follow Thunder Racing, they are working on a "old mans cam" that may be perfect for you.They seem to be on top of LS1 solutions. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
