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Old March 12th, 2018, 03:00 PM   #21
JohnnyJ
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Originally Posted by feva4u View Post
It's not the cost of the heads, it's the cost of everything that changes when you put them on..............is what I've heard. I did the ls3 top end thing so don't listen to me. It's cool but not cost effective at all.

When you pull the heads you'll have to put springs back on, might as well upgrade the springs......oh better look at the lifters, well those are pitted, better put new lifters in.......don't want to put new lifters on a pitted cam, change the cam......well a new oil and water pump wouldn't hurt, better change those too....shit I need to put better springs on now.....better measure and replace pushrods too....shit now I need more injector, better swap those....damn it I'm out of fuel pump, guess I'll need a bigger pump now too, need a new converter while I'm at it and I probably need to have the tranny gone through now and...and .....and...... haha.
Sounds about right.


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Keep it stock till it moves and proves it needs more woopow.
We don't need that kind of negativity around here.
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Old March 12th, 2018, 03:07 PM   #22
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Sarry. I'm shut up now. .
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Old March 12th, 2018, 07:35 PM   #23
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Keep it stock till it moves and proves it needs more woopow.
who invited this guy to the conversation
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Old March 12th, 2018, 07:54 PM   #24
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Old March 20th, 2018, 01:42 PM   #25
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@JohnnyJ

https://www.facebook.com/marketplace...09366689458439

Ls3 intake work? Here’s some more cheap ones


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Old March 20th, 2018, 01:53 PM   #26
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Nope. LS3 is square port, early stuff is cathedral. Those are all truck intakes, so they are tall. Thanks though.
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Old April 3rd, 2018, 06:26 AM   #27
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I would advise against a doorman intake. They are not equivalent to a stocker.

Not sure if it helps you or not but I have a rectangle port truck intake, fuel rails, injectors and throttle body. They’re yours if you want them.
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Old April 3rd, 2018, 07:37 AM   #28
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Interesting take on the Dorman intake. From what I've read they are FAST bottom section and their own upper. I've seen a few flow tests and they match up well with the TBSS intake and Westech/Richard Holdener ran it on the dyno and it pretty much matched the TBSS. Short of 2.5-3x the money for a Fast intake, it seems like a good option.
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Old April 3rd, 2018, 11:02 AM   #29
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Is this a different doorman intake than is considered “oem replacement”? I’m thinking of the stock equivalent.
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Old April 3rd, 2018, 11:33 AM   #30
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It's the 615-901. It's an LS2 car replacement, but it's not just a recast stock part.
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Old April 3rd, 2018, 03:34 PM   #31
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Dorman Redid the intake a few years ago. The initial replacement Dorman was junk. Dorman came out with a different one.
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Old April 3rd, 2018, 08:25 PM   #32
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if it helps any, I'm running a plain car intake, custom grind cam and texas speed heads (pretty sure they're as-cast ls2 heads) compression should be in the high 10s. it's definitely no slouch for power.

simple and reliable. '02 lq4
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Old April 3rd, 2018, 11:02 PM   #33
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Ok, that makes sense. My info is from 2011-ish so it’s good to hear they readdressed that thing.
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Old April 4th, 2018, 02:21 PM   #34
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The new ones make spending $1000 on a fast look even more dumb than it was before. They're legit. Richard Holdernerenererer says so with numbers and charts too
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