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LT4 valve springs with FI?

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Old 02-02-2008, 08:43 PM
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Default LT4 valve springs with FI?

i know a guy that has a T-trim with 16lbs of boost and has a LT4 hotcam kit on the car. not sure how many miles he has had it on his car. but would these springs last? i'm looking at 10-12 psi and need to upgrade my comp ex 612 springs as i don't think they are going to last with boost that high.

what are on options on a LT1 (i'm also running a hotcam cause i got a awesome deal on it.)

i saw some comp springs for $100.00 that are dual springs.
Old 02-02-2008, 10:06 PM
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Why not go with a Comp Cams beehive spring, or check out lingenfelter performance for they're dual springs.
Old 02-02-2008, 10:14 PM
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I didn't think the beehives would be strong enough?
Old 02-03-2008, 08:09 AM
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bump
Old 02-03-2008, 07:26 PM
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Call Comp and tell them what you are planning. For FI, all you really need is a bump of about 40lbs in spring seat pressure.

Jim
Old 02-03-2008, 07:43 PM
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yeah thing is they stopped making them cause they had alot of failures in general.
Old 02-03-2008, 11:44 PM
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I used the lt4 valve springs on my setup in my sig, but I also had a stock cam. I wouldn't use them with an aftermarket cam at all and boost.
Old 02-04-2008, 02:14 PM
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Originally Posted by 94blownz281
i know a guy that has a T-trim with 16lbs of boost and has a LT4 hotcam kit on the car. not sure how many miles he has had it on his car. but would these springs last? i'm looking at 10-12 psi and need to upgrade my comp ex 612 springs as i don't think they are going to last with boost that high.

what are on options on a LT1 (i'm also running a hotcam cause i got a awesome deal on it.)

i saw some comp springs for $100.00 that are dual springs.
Stock valve size?
Old 02-04-2008, 02:27 PM
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yes stock valves



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