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clearance ???

This is a discussion on clearance ??? within the Internal Engine forums, part of the LSx Technical Help Section category; I was just wondering if anybody could tell me if I will have a problem clearance. A friend of had ...

  1. #1
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    2000 Z28 M6

    Question clearance ???

    I was just wondering if anybody could tell me if I will have a problem clearance. A friend of had a cam but sold the car now I have the cam it has .619" / .629" lift and my heads have been cut .005" will it fit with out fly cutting? The cam is a custom cam motion cam 243/251 @ .050 .619"/.629" 110 sep. any info would help
    Last edited by Jons00z; 01-31-2007 at 06:20 PM. Reason: left out info

  2. #2
    Jesus died to save you! Killer_bluebird's Avatar
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    Navy Blue Metallic
    2000 Camaro Z28

    That is a big cam so my guess is no. But it will depend on the Lobe design, That's why and you can have an intake lift of .649" with an Comp Cam LSK lobe but not when you use the older XER lobe. Your best bet is to do the clay test. I know it is a pain but then again it will be easier than pulling a busted motor.
    Last edited by Killer_bluebird; 02-02-2007 at 07:46 PM.
    2000 NBM Camaro Z28
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    SLP Lid & K&N, AHR Headers + 3" catted Y and Mangaflow, !EGR, !AIR, BMR CM STB, ST Front 35mm and Hellwig Adj. Rear 22mm Swaybar, Adj. Rod/Rod PHB, Koni SA's, Ground Control Springs & Adj. Ride height, and HPTuners.

  3. #3
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    wow, that is a big cam, I agree with said before....I would think the heads would need flycutting.

  4. #4
    I would certainly check your cylinders clearance with that big of a cam.

    Better safe then sorry.

  5. #5
    member since may 2000 nhraformula's Avatar
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    2000 nhra edition formula

    only safe way to know is clay it
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  6. #6
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    that's a huge cam. i don't see it clearing if you are using it in a stock shortblock.

  7. #7
    Veteran Hi-Po's Avatar
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    Holy smokes, that is a big cam. Where do you want your power? Definately take that into consideration. Like others said, I dont beleive that cam is going to work with stock shortblock. Not olny the lift but the duration is also very high. Do the clay test an measure. General rule i beleive is .080 inch clearance for instake valve and .100 inch clearance for the exhaust valve. Good luck.

  8. #8
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    cool will do the clay test but prob. gonna build a 408 and put this cam in it. As far as the power lookin for 3500 plus rpms and 456 gears will see where I end up after that.

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