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2004 gto ls1

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Old 03-10-2010, 03:39 PM
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Default 2004 gto ls1

9psi on stock springs??? honest opinions and hard facts welcome. Im going to either go with the stock tail spring of 7.xx psi or go with the 8.70 spring. Id obvisoulsy like the 8.7 spring.

im being told by another gto (ls2) that i should be fine. He seems to think i could do the 10lb spring and be fine?? thoughts please
Old 03-10-2010, 03:55 PM
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I was told to not go above 8psi on stock springs. I have no facts to back this up, just reputable vendors and people that have told me this. But this is on a 00 t/a, Im not sure if the springs are different on a gto or not...
Old 03-10-2010, 04:39 PM
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ive heard the 8-9 is max. hopefully somebody who has experienced this will step in.
Old 03-10-2010, 04:49 PM
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I did 10psi on ls6 springs.. no idea of the difference between the 2. but it did ok
Old 03-10-2010, 05:08 PM
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yeah sujo, i just did a search over on ls1gto. seems as though the ls2/6 yellow springs will hold 10psi easy. but our poor ls1 springs suck donkey D***!!
Old 03-10-2010, 05:34 PM
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I upgraded to yellows so I can run 10. lol
Old 03-10-2010, 05:36 PM
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lol, im actually trolling the classifieds right now looking for a set. Whats the difference between the ls6 black and ls6 yellow??
Old 03-10-2010, 05:40 PM
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Why not just buy some decent aftermarket spings??? Can't the patriots be had real cheap still? And work fine?
Old 03-10-2010, 05:42 PM
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Originally Posted by ninetres
Why not just buy some decent aftermarket spings??? Can't the patriots be had real cheap still? And work fine?
def. but im nearing the end of my budget and just really want 9-10psi until its time for the real build. This is all temporary. The real motor build is happening throughout this year. but if i can have 2-3 more lbs of boost for 50 bucks. why not. lol

when the 408 build begins this season, trust me, i will spare no expense. this is just a hold me over type situation.
Old 03-10-2010, 05:51 PM
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Dont forget some hardened pushrods!
Old 03-10-2010, 06:00 PM
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yep, those are already gotten thanks for looking out though bro!
Old 03-11-2010, 03:06 AM
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jax i have a set of 241 heads with comp 921 springs that i can sell ya fairy cheap
Old 03-11-2010, 11:07 AM
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The Patriots are only like $200... I'd just get those now and reuse them later on. No sense in spending $50-100 only to realize that they're still floating the valves... Plus they're kinda a bitch to change on the car... do it once.
Old 03-11-2010, 11:19 AM
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ill see if i still have the yellow springs when i get home tonight. if so, ill pm u
Old 03-20-2010, 03:01 PM
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I got all of em if u need em, PM me
Old 03-20-2010, 05:49 PM
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Some LS1s will float even without boost, will just be luck of the draw if you get away with it or not.

If your gonna spend $$ on springs just go with Patriots and be done -then reuse on your next build.



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