A.P.D.

iTrader: (1)

rkupon1

iTrader: (3)

It looks broken in half! Jk, cool piece. Should be easy to keep clean

s30.hybrid

iTrader: (3)

G Atsma

I'm thinking easier to cast.

Che70velle

iTrader: (6)

G Atsma

You are correct sir! Just noticed myself that the lid also comes off. I'm thinking it's for both casting and porting (as if it needs any...lol) ease.

wannafbody

iTrader: (2)

I think it's designed for both front mount TB and rear mount depending on swap application.

G Atsma

You can do that by turning the whole manifold around. LS's are nice that way!

ColeGTO

iTrader: (3)

It's made out of three pieces because it is 100% machined, not cast. You start with a chunk of aluminum and run a bunch of spinning tools into it. Ha Ha.

Nice machine work though. Generous plenum size, but I'm not a fan of that short of a runner for a "street/track" car. maybe a drag car with a 1500 RPM range, that's about it.

G Atsma

The appearance in the pic in the first post looks more like an investment casting, not billet machining. What leads you to think it's fully machined? Not being a dick, just going by what I see.

qweedqwag

Sure looks like the cylinders would get an uneven flow just me but just looks to open and no flow direction, then again I'm not an engineer.

ColeGTO

iTrader: (3)

I was going by what I have seen in the past on these intakes. They showed pictures a long time ago and it looked billet. You are correct on the part being cast. i just checked their website and it says that it's cast. They also say that it is "modular" with three different plenum designs to suit your application, so I'm sure this is why it ended up being a three-piece design.

Just looking at the inside, and outside, I don't see a lot of draft angles, so it probably isn't a sand cast piece. I'd hate to know what the tooling cost for that if it is in fact investment cast.

99 Black Bird T/A

iTrader: (4)

Speedworks says double digit hp and torque gains on an LS3 over the factory intake on their website. They also said it fits under a factory Camaro hood without modification, I'm guessing they mean 5th Gen Camaro. Would be nice to see a dyno graph with the intake vs an LS3 intake and a LSXR.

dreadpirateroberts

iTrader: (1)

looks like good, classic plenum design to me. the plenum tapers off at the end and gets smaller, as well as looking like it extends past the last two ports. you'll notice a lot of log style and sheet metal intakes do this, and i'm fairly sure it's to try to ensure all runners get fed equally. stock manifolds don't do this, and purportedly run into issues with the last two runners running leaner than the rest.

Johnnystock

iTrader: (6)

It gained 77hp recently on a H/C Ls3 intake 5th gen. Another guy gained 50rwhp but added ported heads at the same time. Nothing was lost down low in each case. Really nice piece.

rkupon1

iTrader: (3)

77hp from just that intake on an already H/C LS3? No other mods, just additional NA tuning? Im skeptical of those numbers to say the least. Looks like my Performance Design LS7 carbon fiber intake is going up for sale. Only 50 more hp and thats on fully built max effort NA set ups(typical). Its a twin tb cross ram design with big runners.

Johnnystock

iTrader: (6)

Even LOD said those results cant be expected, but it happened. Someone sent them the sheet and he posted it, intake and additional tuning. Of course the initial tune could have been ****. The numbers were low for the kind of mods he had.

25-40hp would be more realistic.

lazerlemonta

I will let you know how it does on a bolt on LS3 and then Cam only. Doing some fitting this weekend to stuff it on my C6 and trying to go after the NA stock cam stock head record on the 6th if weather cooperates.

99 Black Bird T/A

iTrader: (4)

That's an excellent observation about the extended plenum.

BTW - I think you meant the last two can run rich.

If the last two runners get less air flow, given the same amount of fuel - the last two cylinders would run richer not leaner.

Running too rich can cause temps to rise. Overly rich conditions will cause heat because of excess cylinder pressure due to the extra fuel that is either not burning or partially burning.

stevieturbo

You can be sure GM spent a lot more time/money designing theirs to work properly, than any aftermarket company will....and there is no evidence whatsoever to suggest what you're saying is true about the runners.

As for the intake, it has always looked like a nice product. But they were on some forums maybe 2 years ago advertising....did it ever become available ? Has anyone ever actually used one ?