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Old 01-06-2011, 05:14 AM   #1
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Default ? about using LS6 cam for turbo LQ4

can anyone tell me what valve springs i should use, and also what length pushrods i need.?

i understand i can use LS6 valvesprings but didnt know if i should use something a little stiffer to help control the valves with all of the boost/backpressure...? or is this nonsense? lol

thanks in advance
Keith
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Old 01-06-2011, 06:33 AM   #2
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Some people get away with using the ls6 springs, but for piece of mind I'd get a decent dual spring like the patriots. Stock length pushrods will work f fine, but I believe a slightly different size is best for that cam. Don't remember off the top of my head.
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Old 01-06-2011, 06:43 AM   #3
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ITs what im doing not saying its right, but i guess ill find out
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Old 01-06-2011, 08:20 AM   #4
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PAC 1218 are $123 at SDPC if you want something a little stouter than the LS6 springs. Thats what I use, not that Im a hero or expert or anything!
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Old 01-06-2011, 11:24 AM   #5
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7.425 is the correct length pushrod for the ls6 cam.
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Old 01-06-2011, 07:57 PM   #6
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Hank, am i looking at the wrong springs? the ones i found on scoggin dickey were $188...

Valve Springs and Components
PAC1518 PREMIUM NITRIDED BEEHIVE SPRING
$188.80Part Number: PAC1518
Brand: Scoggin Dickey Parts Center
$188.80
Premium Nitrided Beehive Style Spring from Pac Racing Springs. Can use Stock locks and retainers from any LS head. Rated to .650 Lift by Pac.

Outside Dimension:1.290
Inside Dimension: .885
Max Coil Bind: 1.080
Recommended Installed Height: 1.800
Max Rated Lift: .650

Load @ 1.800 - 130lbs
Load @ 1.150 - 337lbs
Spring rate - 313.3 lbs/in
Spring weight - 62 grams
Spring Frequency - 29277CPM

-Thanks for the length on the pushrods too! i am ordering some comp cams hi-tech one piece push rods.
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Old 01-06-2011, 08:51 PM   #7
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i dont wanna get too far off topic but real quick can i get an opinion on injectors too? i had planned on running 80lbers, for some room to grow, but how would i do with 60lbers.

looking to make 650rwhp.
tc78/lq4 12-14psi

anyone got a good used LS6 cam?
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Old 01-06-2011, 08:59 PM   #8
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to continue this thread, just how far can you take the z06 cam before it becomes a hindrance?
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Old 01-07-2011, 05:18 AM   #9
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Thats also a good question im hoping it will work without much trouble to my goal of 600-650rwhp, another things is i dont intend on revving my motor over 6000 rpm... hopefully itll all work out.
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Old 01-07-2011, 06:24 AM   #10
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Quote:
Originally Posted by I_Need_Land View Post
to continue this thread, just how far can you take the z06 cam before it becomes a hindrance?
Not sure on power, but i know some people here running it in the 9s.
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Old 01-07-2011, 07:55 AM   #11
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local guy makes 670-715rwhp depending on the day and the dyno with a completely stock 03 Z06, runs a TTI twin turbo kit, 60lb injectors and 13lbs boost.
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Old 01-07-2011, 08:29 AM   #12
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you guys otta look at the ls6 cam this way as far as rpm peak, if you're shifting at 6500 and the cam is peaking tq at say 5800, well that'd be saving someone's *** in the detonation dept cuz detonation happens at peak tq, so if you're revving on past that point, than you're pushing away the chance of detonatiing the engine. point is dont cam for peak tq at your peak rpm, if you do, better run the best fuel you can get your hands on.
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Old 01-07-2011, 12:23 PM   #13
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just get the patriot gold spring kit,
comes with titanium retainers, valve seals and duel springs for around $255

60lb injectors will do fine, I'm at 700rwhp at 85% duty cycle.
but if your thinking E85 in the future, go the 80s now.
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Old 01-11-2011, 08:37 PM   #14
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If you are going to run very high boost, I'd go ahead and get a dual spring. If it's only moderate boost I would run the PAC1218 or 1518. Give us a call and we will give you a good deal on both some springs and the 7.425 pushrods.
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Old 01-11-2011, 08:56 PM   #15
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I chose a TR224-.581/.581-114 over the Ls6 cam just to get a little more outa the setup and keep great drivebility.

For springs, i have patriot gold duals. Having slightly overkill springs is just cheap insurence in my eyes.
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Old 01-12-2011, 03:31 AM   #16
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Quote:
Originally Posted by dschmittie1 View Post
7.425 is the correct length pushrod for the ls6 cam.
Depends on which litters and head gaskets are going to be ran. You should really spend the 16 bucks for a checker and measure what pushroad you need.
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Old 01-12-2011, 06:47 AM   #17
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Quote:
Originally Posted by MUSTANGBRKR02 View Post
Depends on which litters and head gaskets are going to be ran. You should really spend the 16 bucks for a checker and measure what pushroad you need.
Piss, i will do have to do this then, i put the 03 z06 cam in my lq4 with 241 heads and ls9 head gaskets. didnt think there would be an issue, guess ill be checking them them.
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Old 01-12-2011, 07:37 AM   #18
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what about using stock lq4 lifters and head gaskets? i already bought a set of the 7.425 pushrods off a friend....

am i alright on length...?
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Old 01-12-2011, 09:11 AM   #19
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Quote:
Originally Posted by 91blowthru View Post
what about using stock lq4 lifters and head gaskets? i already bought a set of the 7.425 pushrods off a friend....

am i alright on length...?
stock length is 7.4
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Old 01-12-2011, 04:49 PM   #20
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Well I have the ZO6 cam, and I used the 7.45 push rod. Car runs good, havent added the turbo yet. I can really here the cam after warm up!
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Old 01-12-2011, 04:49 PM
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2004, 7425, cam, engine, gasket, gto, head, length, lq4, ls6, pushrod, pushrods, set, stock, turbo, z06


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