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Old Mar 12, 2005 | 11:25 AM
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they say that these things are good to .600 lift. i am installing a cam with a .598 lift. should i have any problems with these or should they be ok?
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Old Mar 12, 2005 | 01:44 PM
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Originally Posted by 2000blackta
they say that these things are good to .600 lift. i am installing a cam with a .598 lift. should i have any problems with these or should they be ok?
I'll defer to some of the real techs here, but I was told you want at least .030" headroom
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Old Mar 12, 2005 | 02:37 PM
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to me that's pushing the limits of the spring. i would get douple springs for that high of lift.
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Old Mar 12, 2005 | 02:40 PM
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I wouldnt use them without having them checked for coil bind. Call around and see if you can find a shop with a valvespring tester. Set the spring to installed height and them compress it to .600" and see if the coils are binding. You want .060" between the coils at max lift to be safe.

You will also be able to see your seat and full lift pressures during this test.

-Mike
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Old Mar 12, 2005 | 02:46 PM
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thanks alot guys. so if the springs aren't going to work, what would you suggest?
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Old Mar 12, 2005 | 05:52 PM
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they will work, they are designed to handle .600 and still have clearnce
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Old Mar 12, 2005 | 06:35 PM
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I run the Manley Nextek Dual springs, good up to 650 lift.

My cam specs are 236/240 601/608 114 + 4.

Don
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Old Mar 12, 2005 | 06:55 PM
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I run 918's on a FMS F11 575/597, Dont worry about "having " to run a dual spring, I would run 918's on cams with 600-610 lift no problem.
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Old Mar 12, 2005 | 07:26 PM
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I ran the manley springs on an x1 cam..... .571/.591 lift.... got about 7000 miles out of them before I broke one....

GET DUAL SPRINGS
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Old Mar 12, 2005 | 10:08 PM
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I have 15,000 on mine....and they were used with the LPE GT2-3 and the TR224. No problems thus far, but I did break 2 stock rockers. I am using stock pushrods.
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