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Old 01-17-2011, 07:16 PM   #1
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After market cam with stock springs?

So I have pushing the idea around with an LS9 cam swap in my LS3, reason being is that it is in my price range! They work with stock tune and stock valve train parts! The problem I have with it, is that from I understand there is no lope So my question is... is there any aftermarket cams that are close in spec to the LS9 cam that I could use with my stock springs ect. That will give me some cam lope?
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Old 01-17-2011, 07:20 PM   #2
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Are you doing the labor yourself? If not, thats not alot to save for a minimal gain....to go with a cam that will make noticeable gains you will need to match springs to the lift. Do it right and you won't regret it.
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Old 01-17-2011, 07:30 PM   #3
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The LS9 cam does have some sound to it at idle. It definitely doesn't sound stock. Check out the GM "hot cam" with the narrow lsa and .525" lift (I think). It's not that high in lift but I'm pretty sure it will require a tune. If you're paying for the install go with a true aftermarket cam as the savings will be minimal.
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Old 01-17-2011, 07:30 PM   #4
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Quote:
Originally Posted by SC2150 View Post
Are you doing the labor yourself? If not, thats not alot to save for a minimal gain....to go with a cam that will make noticeable gains you will need to match springs to the lift. Do it right and you won't regret it.
I agree. The springs are easy to replace with the right tool.

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Old 01-17-2011, 07:38 PM   #5
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Money is an issue...I would be doing the labor myself, so this LS9 cam swap would be super cheap! I keep hearing this cam sounds stock, thats the only thing that I dont want! All I want is a little lope and it would be totally worth it, I want to do that cam with long tubes and 1 chamber flowmasters... hoping it will sound tuff, kinda old school! I know a bigger custom is the way to go, but I just dont have the funds for that, I could always do that in a few years.
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Old 01-17-2011, 08:28 PM   #6
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Why the LS9 cam? Are you going with a blower soon? If not, the GM hot cam should be in the same price range. Or save for a little while more and get a full kit with a bigger custom grind cam.
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Old 01-18-2011, 01:20 PM   #7
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why would you not want to do springs.......when you increase lift you need to increase spring pressure because you have changed the resonance points of the valve....in other words you could get valve float without a higher spring constant valve spring.....

It will hurt upper RPM performance of the engine.........thats why you do springs...

If you just want a little more power get 1.8 rocker arms and leave the cam alone.

If you just want sound I'll mail you my single letter mass air meter...it reads on the low range and makes my car sound like it has a little cam to it.

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Old 01-18-2011, 01:39 PM   #8
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I am not going to even read the first post

the title says it all "aftermarket cam with stock springs"

the answer is no

no matter what, no

no no no no no no no no

again... no

just no

NO
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Old 01-18-2011, 01:55 PM   #9
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Quote:
Originally Posted by Irnwkrkev View Post
The LS9 cam does have some sound to it at idle. It definitely doesn't sound stock. Check out the GM "hot cam" with the narrow lsa and .525" lift (I think). It's not that high in lift but I'm pretty sure it will require a tune. If you're paying for the install go with a true aftermarket cam as the savings will be minimal.

Agree with this on the LS9 cam...I've got one and it does sound a little different than stock at idle but no "Hot Rod" lope like what you're wanting.
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Old 01-18-2011, 02:22 PM   #10
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Like I said its a cost thing, the Ls9 cam works with a stock tune and stock parts and makes 20rwhp alone and with addition of headers... ADM made 430hp at the wheels! So for my free labor I think its a good upgrade, I dont need a leason as why you need to replace springs with a cam, its just a question. The Ls9 cam works with stock springs, so I figured there might be somthing out there that is simular that may have some lope. I have not found anything, so I think I might just do this Ls9 cam for now.
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Old 01-18-2011, 03:43 PM   #11
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After spending $38,000 for a car, saving $300 bucks on a cam swap and stock springs isnt what you want to do.

Do yourself a favor and take it from guys that have been around for a while, Spend $300 on a decent cam, $300 on dual springs, and $150 for harden push rods. Save your $10K motor not a couple hundred bucks. If money is an issue, the performance game is not for you.

If you want to save money, increase your insurance deductible.
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Old 01-18-2011, 03:49 PM   #12
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Originally Posted by Phil'sC5vette View Post
After spending $38,000 for a car, saving $300 bucks on a cam swap and stock springs isnt what you want to do.

Do yourself a favor and take it from guys that have been around for a while, Spend $300 on a decent cam, $300 on dual springs, and $150 for harden push rods. Save your $10K motor not a couple hundred bucks. If money is an issue, the performance game is not for you.

If you want to save money, increase your insurance deductible.
I find this so logical and funny at the same time.
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Old 01-18-2011, 05:56 PM   #13
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Adding 1.8 roller rockers is way more expensive than even an aftermarket cam and it is recomended to change springs with them. With higher ratio rockers you are increasing the ramp rate and adding lift which brings you closer to coil bind. The LS9 cam is a FACTORY CAM and has virtually the same lift as stock but with more duration. I have reved my LS3 with LS9 cam to 6,800rpm without valve float. With the wide lobe separation angle big int/exh split the power doesn't drop off rapidly either. 20hp for less then $200 is a bargain. Now if you have to farm it out forget it. Spend the $600+ and go with an aftermarket cam because you'll be spending more then that on labor. I'm pretty sure the GM "hot cam" with .525" lift will work fine with the stock springs but with such a tight lobe separation angle it will most definitely require a tune.
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Old 01-18-2011, 07:58 PM   #14
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What do you mean save my 10K motor, the LS9 cam is a stock GM cam, how in the hell would that ruin my engine! I have been around cars for a long time, and I know big cams need matching springs! Thats not what my question was guys If I buy a aftermarket cam setup your talking ALOT MORE MONEY! Not to mention more money on a tune, and I dont want a tune yet! This cam works with stock tune and headers, ADM has already done this and sells this setup. The cam swap would be done by me, so its only a 200$ job for 20rwhp, why would you not do it!! You would rather spend $400 on a cold air...not me! That cam and long tubes will make some nice power and I will have money to spend on other areas of the car. Like make traction to put down the power!
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