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This is a discussion on confused within the Internal Engine forums, part of the LSx Technical Help Section category; duration-216intake 220-exhaust. cross valve lift-.525intake .532 exhaust. my friend is buying a cam and those are the specs, i have ...

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    ls1ftw tigersport14's Avatar
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    confused

    duration-216intake 220-exhaust. cross valve lift-.525intake .532 exhaust. my friend is buying a cam and those are the specs, i have no idea what it means. can anyone help me out? and with that cam does he need no springs and stuff?

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    15 sec. Oh yeah, its fast UTVols98's Avatar
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    Is he buying the hot cam? Honestly it's not worth the money you spend on it when you can get cam's that will get you much better power for less money. The 216 is how many degrees the intake valve will stay open. The 220 is how many degrees the exhaust valve stays open. The .525 is the maximum lift of the intake valve and the .532 is the max lift of the exhaust valve. There should be one more number after those telling the lobe separation on the cam. I think the hotcam is 117 degrees of lobe separation, but not real sure.

    That's a small cam and if your looking for power, I'd look for something else. A cam like that is more for forced induction.
    2000 Z28: Accufab 4150, Vic Jr. 150 shot, Patriot stg 2 heads, big cam, FLT Stg VI 4L60, S60 rear. Waaay more stuff to list. 3100 LBS.

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    ls1ftw tigersport14's Avatar
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    hmm.. will he need new springs?

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    15 sec. Oh yeah, its fast UTVols98's Avatar
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    I would go ahead and replace them with new ones just cause I'm almost certain he'll put that in and realize he'll want more power and go get a larger cam where you'll need better springs. No, he doesn't, but with any larger cam he'll need new ones. You can get a deal with cam packages that come with all you'll need from Thunder Racing or Texas Speed.

    What's he looking for out of the cam though?

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    ls1ftw tigersport14's Avatar
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    a daily driver cam, so pretty reliable.

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    15 sec. Oh yeah, its fast UTVols98's Avatar
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    That cam will be really reliable then and should keep all the stock driveability. You won't see a big power increase though.

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    LTX N20LT4's Avatar
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    Those specs are not HOT Cam specs. The HOT cam has a 219/228 I/E dur. and .525"/.525" lift w/ a 112 LSA. Anyhow, those specs you listed are very mild. I'd definitely go bigger unless emissions is a strict issue.

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    ls1ftw tigersport14's Avatar
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    Quote Originally Posted by UTVols98 View Post
    That cam will be really reliable then and should keep all the stock driveability. You won't see a big power increase though.
    how much bigger could he go without it becoming a nusanse with daily driving, as far as reliability and such.

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    15 sec. Oh yeah, its fast UTVols98's Avatar
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    I probably wouldn't go any bigger than a 226 duration a 580 lift and 114 or higher LSA if you want a close to stock driveablility. The farther the LSA the less choppy it will be.

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    ls1ftw tigersport14's Avatar
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    thank you

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