So guys Ive been doing some research, I have a few questions hoping to see if someone can help. So i just recently joined 60DegreeV6 forum, and I was reading and noticing that a lot of LZ9 guys get rid of the LZ9 intake manifold, and switch it with a ported LZ4 intake manifold and also upgrade using the throttle body converter, to the GM truck 5.3L throttle body. I'm trying to figure out is this because they are t get rid of the 3.9's dual runner or variable length design, one set of long runners for improved torque at low rpm but switches to short runners for high rpm flow due to not understanding how to tune with it, or because a Ported LZ4 manifold is actually more beneficial ?? I don't know what to think ?? If it is more beneficial, think WAMS will tune for it ??
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Crazy enough to work ?!?!
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Re: Crazy enough to work ?!?!
Originally posted by G6KinG19 View PostFirst of all the intake manifold that you are looking at in WOT is for LX9 engines not the LZ4 engine
secondly using Throttle Body Adapter - 75mm <-------- need more info
If you look at this forum he shows that manifold on a lz9 also the second link was a throttle body adapter it converts the stock manifold to fit a gm 5.3l
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Re: Crazy enough to work ?!?!
Originally posted by G6KinG19 View Postwow i am shock that the lx9 fits on a lz9 so that means it will also fit the lz4 because the lz4 and lz9 are basically the same
but can explain how that throttle body adapter works?
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Re: Crazy enough to work ?!?!
Typically speaking (and if anyone knows better than me, please speak up) a dual plane intake helps you get more usable power in the low rpms while sacrificing a little on the top end. Single plane intakes increase peak power but at the expense of useful power for the street. In short, changing to a different intake manifold changes your power curve.
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Re: Crazy enough to work ?!?!
Originally posted by Rannin Ravensight View PostTypically speaking (and if anyone knows better than me, please speak up) a dual plane intake helps you get more usable power in the low rpms while sacrificing a little on the top end. Single plane intakes increase peak power but at the expense of useful power for the street. In short, changing to a different intake manifold changes your power curve.
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Re: Crazy enough to work ?!?!
Don't get me wrong, I think in your situation you should go for it. Straight pipe exhaust would also get you peak power while sacrificing low end, just nobody's doing that for the street.
This is all very generalized as well. The power curve would really depend on how long your intake runners are and the volume of the manifold.
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Re: Crazy enough to work ?!?!
Those mods ain't going to hurt the torque as bad as people might think. It will do great daily driving as long as you get it tuned. I think you'll be more than happy with the results.Mods:Wams lx9 tune, gtp rear valance, custom Flowtech catback, volant cai and box, raceline stb, CM lowering springs, pioneer touch screen stereo, black vinyle arrow head overlays, Pontiac rear window decal and finally g6performance decals.
Not much left without dumping a few grand so I guess ill be redoing the stock sound system with polk audio everything.
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Re: Crazy enough to work ?!?!
I put my disclaimers in there "Typically... generally...etc"
Of course you could run without an intake manifold at all, or without exhaust manifolds for that matter. Mostly these parts are designed to make the engine more friendly. But if you're going for the gusto, you should do everything you can to make power.
Also, there is more than 100 years of hot rodding theory out there, but that is no replacement for trial and error. Try stuff and tell us what's working for you. That's just my opinion, mind you.Last edited by Rannin Ravensight; 09-29-2013, 11:43 PM.
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