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valve springs for boost.

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Old 12-01-2009, 08:21 PM
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Default valve springs for boost.

I seen in the sticky that patiot duals could be used but was wondering what everyone else uses. It will be stock bottom, stock cam, 317's and a D1sc with fmic set on 8# pulleys(I know, disaster waiting to happen). What are you guys with similar setups using?
Old 12-01-2009, 08:22 PM
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Im going to be running ls6 yellows @ 6psi with my turbo setup. Should hold me over until I have a forged motor :p
Old 12-01-2009, 08:24 PM
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Yeah, a forged 347 is next on the list after the D1
Old 12-01-2009, 10:52 PM
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I have ferrea dual springs and stainless valves in my 317 heads.
Old 12-02-2009, 02:13 PM
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dont know how much truth there is to this statement, but i have been told by some locals that a set of stock springs on 241 heads will start to let loose after 7-8 lbs.....? like i said, dont know how much truth there is to this.
Old 12-02-2009, 04:05 PM
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patriot golds dual for the last 3 years and have not floated them yet 15-18 psi
Old 12-02-2009, 04:11 PM
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Originally Posted by JAX04
dont know how much truth there is to this statement, but i have been told by some locals that a set of stock springs on 241 heads will start to let loose after 7-8 lbs.....? like i said, dont know how much truth there is to this.
Very true probibly start floating earlier like 5-6 lbs.
Old 12-02-2009, 04:25 PM
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A fresh set of LS6 springs on a stock cammed centrifugal setup will make it too 8psi, I would run at least 1218 PAC springs though.
Old 12-02-2009, 05:54 PM
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Must be nice!!! 2nd set of Patriot Gold Extreme's and I floated the first set and a set of the best springs that come with AFR225's.

Originally Posted by OUTLAWZ RACING
patriot golds dual for the last 3 years and have not floated them yet 15-18 psi
Old 12-02-2009, 06:19 PM
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^^^Whats your set-up though?
Old 12-02-2009, 06:35 PM
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1999 Chevy Corvette Fixed Roof Coupe
SW/BM 408ci w/AFR 225's 72cc
Patrick G 224/230 .609/.604 114LSA +2
TTi X kit with twin T3/T4's A/R .82


Originally Posted by BIG_MIKE2005
^^^Whats your set-up though?
Old 12-02-2009, 08:09 PM
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^^ how much psi ?
Old 12-02-2009, 10:24 PM
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Originally Posted by hellbents10
A fresh set of LS6 springs on a stock cammed centrifugal setup will make it too 8psi, I would run at least 1218 PAC springs though.
I'm going to go with at least patriot dual gold's to be safe. I also heard that prochargers 8 psi pullies actually make about 10-11 psi. Any thoughts?
Old 12-03-2009, 12:50 AM
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Originally Posted by VINCE
1999 Chevy Corvette Fixed Roof Coupe
SW/BM 408ci w/AFR 225's 72cc
Patrick G 224/230 .609/.604 114LSA +2
TTi X kit with twin T3/T4's A/R .82
I would like to know the RPM and also the lifters you are using? Also are they shimmed?
Old 12-03-2009, 07:03 AM
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Originally Posted by VINCE
1999 Chevy Corvette Fixed Roof Coupe
SW/BM 408ci w/AFR 225's 72cc
Patrick G 224/230 .609/.604 114LSA +2
TTi X kit with twin T3/T4's A/R .82
How much boost & how high are you spinning it?

That lift isnt too bad on that cam. You must be beatin the **** outta that thing to be blowin thru springs like that.
Old 12-03-2009, 07:29 AM
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not to go offtopic, but does someone know the specifications for stock L92 valve springs?
Old 12-03-2009, 12:08 PM
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Originally Posted by 94dragbird
I seen in the sticky that patiot duals could be used but was wondering what everyone else uses. It will be stock bottom, stock cam, 317's and a D1sc with fmic set on 8# pulleys(I know, disaster waiting to happen). What are you guys with similar setups using?
a buddy of mine has this set up with stock springs, 241 heads, around 8 pounds i think, he hasn't had any problems been with the set up for over a year now
Old 12-03-2009, 09:51 PM
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Thanks for the opinions guys. I'll probably go with the patriot dual golds
Old 12-03-2009, 10:05 PM
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good choice you don't want to skimp on the valve springs..... Might even think of gettin the extremes just a little more doe. Might as well in case you decide to up the boost?
Old 12-03-2009, 11:14 PM
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haha yeah... I'm going to try and keep it at 8 until I can forge the bottom end... I can get a replacement for cheap but don't care to pull an engine if I don't have too....


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