Katech independently tests FAST LSXR LS3 manifold vs two ported LS3 manifolds - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Katech · 05-09-2011, 03:29 PM

Last week we conducted a test of two different ported LS3 intake manifolds and a FAST LSXR 102mm intake. The test subject was a 6.2L LS3 with the following:
-Katech Torquer LS3 cam
-Springs, retainers, pushrods
-WCCH ported heads
-C5-R timing chain
-Katech ported oil pump

Tests are as follows:
C2-9336 - stock baseline 530hp/477ft-lbs
C2-9344 - brand Y ported LS3 intake 529hp/474ft-lbs
C2-9348 - brand X ported LS3 intake 527hp/470ft-lbs
C2-9345 - FAST LSXR 102mm intake manifold 538hp/484ft-lbs

Zoomed:

As you can see both the ported manifolds lost power and the LSXR was the only one with a gain. These intakes were shown on the chassis dyno to make power so it just goes to show that the chassis dyno is not a good place to do precise A-B testing, and every tuner that ports manifolds will do what they can to make the product look good when testing. When you take that product to the controlled conditions of the engine dyno and take out all the variables, you see that you have actually lost power. This is a fairly mild LS3 engine and we can only guess that the more modified the engine is, the more it would benefit from the FAST manifold. Whether the gain on a stock or mildly modified engine is worth it to you, only you can decide.

Jason7 · 05-09-2011, 03:39 PM

Reminds me of the ported heads and even aftermarket heads versus stock. Tons of money and the benefits aren't that large.

Thanks for this test!

Jason

Dexgto · 05-09-2011, 05:58 PM

Now thats some interesting results not what i thought they were gonna be.

Halltech · 05-10-2011, 06:20 AM

You forgot to mention the intake system used for the baseline 530 HP.

Can you clarify what stock meant? I know, but others may not.

Padre · 05-10-2011, 07:09 AM

What size Throttle Body? Was the FAST 102 matched to a 102 TB?

Padre

Katech · 05-10-2011, 07:32 AM

Quote:

Originally Posted by Halltech

You forgot to mention the intake system used for the baseline 530 HP.

Can you clarify what stock meant? I know, but others may not.

I was referring to the stock intake manifold. The air intake system for each test was the Halltech Bumblebee carbon fiber Camaro intake system.

Katech · 05-10-2011, 07:32 AM

Quote:

Originally Posted by Padre

What size Throttle Body? Was the FAST 102 matched to a 102 TB?

Padre

Throttle body was 90mm. Plenty for a mild 6.2L.

Padre · 05-10-2011, 08:00 AM

Quote:

Originally Posted by Katech

Throttle body was 90mm. Plenty for a mild 6.2L.

Thanks for the response. Wasn't the FAST 102 built for a 102 TB? If so, what gains are to be had? And if few on a "mild" setup, when do you start to see the benefits of a 102 TB? It just seems like 90 TB on a 102 FAST is a restriction.

Thanks, Padre

Katech · 05-10-2011, 08:14 AM

Quote:

Originally Posted by Padre

Thanks for the response. Wasn't the FAST 102 built for a 102 TB? If so, what gains are to be had? And if few on a "mild" setup, when do you start to see the benefits of a 102 TB? It just seems like 90 TB on a 102 FAST is a restriction.

Thanks, Padre

It can take a 90-105mm throttle body. We tested 90 vs. 102 on a 600hp LS7 and it was about 5hp. On a 530hp 6.2L it's not going to be throttle body-limited with 90mm.

2010SSRSM6 · 05-20-2011, 10:58 AM

If you have a TT setup pumping into the FAST intake, would it be worth the extra $$$ to step up the the larger TB?

05-09-2011, 03:29 PM	#1
Katech Account Suspended Drives: C6 Z06 Join Date: Nov 2009 Location: Clinton Twp., MI Posts: 104	Katech independently tests FAST LSXR LS3 manifold vs two ported LS3 manifolds Last week we conducted a test of two different ported LS3 intake manifolds and a FAST LSXR 102mm intake. The test subject was a 6.2L LS3 with the following: -Katech Torquer LS3 cam -Springs, retainers, pushrods -WCCH ported heads -C5-R timing chain -Katech ported oil pump Tests are as follows: C2-9336 - stock baseline 530hp/477ft-lbs C2-9344 - brand Y ported LS3 intake 529hp/474ft-lbs C2-9348 - brand X ported LS3 intake 527hp/470ft-lbs C2-9345 - FAST LSXR 102mm intake manifold 538hp/484ft-lbs Zoomed: As you can see both the ported manifolds lost power and the LSXR was the only one with a gain. These intakes were shown on the chassis dyno to make power so it just goes to show that the chassis dyno is not a good place to do precise A-B testing, and every tuner that ports manifolds will do what they can to make the product look good when testing. When you take that product to the controlled conditions of the engine dyno and take out all the variables, you see that you have actually lost power. This is a fairly mild LS3 engine and we can only guess that the more modified the engine is, the more it would benefit from the FAST manifold. Whether the gain on a stock or mildly modified engine is worth it to you, only you can decide.

05-10-2011, 07:09 AM	#5
Padre Only drives on Sundays Drives: '16 2SS A8 NPP MRC NGray Join Date: Feb 2011 Location: Dalton, GA Posts: 2,500 View My Garage	What size Throttle Body? Was the FAST 102 matched to a 102 TB? Padre __________________ OLD HOTNESS: The "Heretic": '11 2SS/RS L99 A6 Black/Inferno. Build Journal, Videos D1SC GT9 JBA-LT = 720/680 \| 10.330 @ 133.61, 1.546 sixty... Camaro King at ECS V, Darlington. NEW HOTNESS: '16 2SS A8 NPP MRC. Bone Stock, 1/8th: 8.051 @ 89.44, 1.919

05-20-2011, 10:58 AM	#10
2010SSRSM6 Drives: My wife crazy with my C5 usage. Join Date: Apr 2009 Location: DFW Posts: 6,558 View My Garage	If you have a TT setup pumping into the FAST intake, would it be worth the extra $$$ to step up the the larger TB? __________________ UNDER CONSTRUCTION......again......

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05-09-2011, 03:39 PM	#2
Jason7 NorCalCamaros.com Drives: 2010 2SS White Join Date: Mar 2011 Location: California Delta Posts: 1,138 View My Garage	Reminds me of the ported heads and even aftermarket heads versus stock. Tons of money and the benefits aren't that large. Thanks for this test! Jason

05-09-2011, 05:58 PM	#3
Dexgto Drives: 2009 Pontiac G8 Join Date: Feb 2011 Location: Charleston SC Posts: 82	Now thats some interesting results not what i thought they were gonna be.

05-10-2011, 06:20 AM	#4
Halltech Drives: 2010 Halltech Camaro SS, 2008 C6Z06 Join Date: Sep 2009 Location: Milwaukee, WI Posts: 363	You forgot to mention the intake system used for the baseline 530 HP. Can you clarify what stock meant? I know, but others may not.