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teach me about cams


SRTurbo04

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Ok so the next step in my slow neons life is a set of cams. But I'm clureless on all what this crap means in english.

 

 

What is lift

 

Duration

 

Lobe seperation

An gross lift? I've been directed down to three cams but seeing as I don't know what it means I can't decided on which cams ar....

 

Brian crower stage 2 cams. Doesn't need new spring or retainiers.

 

Intake duration @.50" 194 degrees

Lift .222(x1.75)= .389

Exhaust duration @.50" 186 degrees

Lift .225(1.75) = .383

 

 

Stage 3 cams require new spring an retainiers a possibly tuned

Intake duration @.50" 216 degrees

Lift .225 x1.75 = .394

Exhaust duration .50" 216 degrees

Lift .225 x.175= .394

 

 

 

Or crane which this is specd for a n20 cam which I will be spraying

Duration. For intake an exahust is 246

 

Duration @.50 intake an exhaust 204/204

Lobe seperation 112

 

Gross lift 364/364

These are from the site list which is. All gibberish to me can any one help me out an school me on some cams an what it all means. Btw serious answers please as I need to learn this crap

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Guest 614Streets

Duration is how long the valve stays open

 

Lobe seperation angle is the angle between the two lobe centerlines

 

Gross lift is how many thousands of an inch the valve opens

 

 

Same pattern cams have the same duration at .5 lift and split pattern have different duration at .5 lift

TYPICALLY

Nitrous cams fall in the 110-113 lsa

Turbo cams fall in the 111-114 lsa area

Blower cams fall in the 113-114 lsa area

 

NA can fall anywhere lsa but good power is seen 110 and down lsa with N/A

 

The closer to 114-116 lsa the less valve overlap when on the exhaust stroke , exhaust valve closing, and intake valve opening is your overlap.

 

With blowers too much overlap and your boost is "lost" escaping out the overlap cycle.

 

Turbos can benifit from some over lap as they can use the energy for quicker spooling.

 

Nitrous lsa does not need to be quite as high because there is no boost.

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BC280's

 

Their all you will need and they sound badass

 

I know I can ask him which cam to use but if possible ide like to understand what I'm loooking at. I hate everyone. Just telling me what to get, ill never learn that way haha

 

not what he wants he wants someone to Learn him some cam talk

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Guest 614Streets
If your running nitrous and boost then you dont want much overlap you want to keep that charge in the chamber for power. And this is one of thoose areas where you definately pick up the horn and chat with the cam manufacturer guys and think about custom grinds.
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If your running nitrous and boost then you dont want much overlap you want to keep that charge in the chamber for power. And this is one of thoose areas where you definately pick up the horn and chat with the cam manufacturer guys and think about custom grinds.

 

I agree here, call and talk to them Paul.

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