what intake manifold should i get with my procharged 408 - LS1TECH

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what intake manifold should i get with my procharged 408

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Old 10-22-2006, 04:35 PM   #1
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Default what intake manifold should i get with my procharged 408

well im been waiting for my clutch for over a month now and im getting bored

i already had my FAST 90/NW setup so thats what im using. and since i havent finished with the dyno im thinking maybe i should change it up now before the tune it done. every talks about loosing low end tq with certain setups. but this in not a daily driver and loosing low end tq for better flow through out the rpms i can take be it i WILL NOT BE ABLE TO PUT ALL the power down to the ground in city streets as it is

thanks steve

Click the image to open in full size.

just wanted to ***** out some pictures.. like i said bored lol
here it is when car was maybe 2 years old back in 2004
Click the image to open in full size.
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2002 WS6: LME 408ci/ KYTP S88 820rwtq/711rwhp @4600rpms
Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy

Last edited by SVC707; 10-23-2006 at 02:32 PM.
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Old 10-22-2006, 04:56 PM   #2
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Wilson manifolds just released a nice sheet metal unit, probably very pricey though. If it was me, I'd sell the FAST and buy an LS6 and pocket the difference.

Or you could go with the GMPP carb intake, lots of guys make good power with that.
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Old 10-22-2006, 05:01 PM   #3
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i thought about going back to an LS6 that was my factory manifold. i was thinking about going with the GMPP carb intake. since i already have speedince rails i just need the manifold and intake elbow correct? i want everything to look different, as in when the hood opens people will just go DAMN. plus giving more room to grow. i hate my intercooler piping so i will be redoing that too. and also putting a straight standing radiator.
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Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy
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Old 10-22-2006, 05:18 PM   #4
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i see there is a GMPP carb style. then there is the victor jr... are these the same?
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Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy
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Old 10-22-2006, 05:23 PM   #5
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check out the link in my sig , go to page 3
i vote Vic Jr.
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Old 10-22-2006, 05:26 PM   #6
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If I'm not mistaken the Vjr is slightly taller... the GMPP will likely clear the hood easier.
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Old 10-22-2006, 05:30 PM   #7
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Quote:
Originally Posted by KHShapiro
check out the link in my sig , go to page 3
i vote Vic Jr.
i have seen your setup before. very nice
where do i get this manifold from and can i still use the fuel rails i have with new mounts. and i think the best place to get the elbow was intake elbows or something...
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Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy
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Old 10-22-2006, 05:31 PM   #8
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Quote:
Originally Posted by Frost
If I'm not mistaken the Vjr is slightly taller... the GMPP will likely clear the hood easier.
ive read something about that better only now am i really thinking about swaping. thanks for the heads up i didnt want to get stuck saying i shouldve got the other one
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Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy
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Old 10-22-2006, 05:33 PM   #9
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you can get the manifold from any sponsor i thik they are 399 w/fuel rails.
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Old 10-22-2006, 11:19 PM   #10
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where do you tap into these manifolds for the boost gauge. i dont see any ports anymore

looking at some pictures, looks like i can have the vic jr machined on the top surface to bring the elbow down some to give it a little bit more clearance too
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Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy
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Old 10-23-2006, 12:37 AM   #11
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I would go with the carb intake on the 408. You will have great top end power on it and you have enough cubes to make up for down low
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Old 10-23-2006, 01:53 AM   #12
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Quote:
where do you tap into these manifolds for the boost gauge. i dont see any ports anymore
Moparnos did mine and he tapped some fittings into the back of the manifold. Seems to work good.
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Old 10-23-2006, 10:49 AM   #13
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what about my fuel rails from speedinc, can i still use these or will i have to purchase the other set
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Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy
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Old 10-23-2006, 11:43 AM   #14
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Who makes intake/tb elbows for the manifold?

Keith
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Old 10-23-2006, 11:49 AM   #15
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Local guy here just went 5.6x @ 130 in the 1/8 mile with twin turbo 402, stock LS6 intake and stock throttle body, patriot heads even.

Food for thought
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Old 10-23-2006, 11:56 AM   #16
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Quote:
Originally Posted by 2MUCHBOOST
I would go with the carb intake on the 408. You will have great top end power on it and you have enough cubes to make up for down low
I second that.... You're going to have no problem with it down low and it would probably help to move the torque up a bit so that you could actually get some traction...
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Old 10-23-2006, 11:57 AM   #17
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Quote:
Originally Posted by ls1290
Who makes intake/tb elbows for the manifold?

Keith
Aaron makes a elbow for them...You can get the stock tb style elbow all the way up to a 105mm which can use a Accufab that the Mustang guys use...
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Old 10-23-2006, 12:05 PM   #18
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Quote:
Originally Posted by SVC707
what about my fuel rails from speedinc, can i still use these or will i have to purchase the other set
You can use any aftermarket fuel rails...You just have to have the stands to mount them... Aaron makes those too I believe...
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Old 10-23-2006, 12:12 PM   #19
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looks like the gmpp has the same mounting for my speedinc rails and will sit lower, but will cost a tad bit more overall after needing drilling for the injectors, and the gmpp needs a different gasket than the oem round gaskets
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Photo of car here: http://www.ls1tech.com/forums/showthread.php?t=603195
2001 Chevy Silverado 2500HD KBRacing turbo manifold, MPT76 130k on stock long block and transmission 433rwhp/526rwtq

Both tuned by Rick @Synergy
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Old 10-23-2006, 12:27 PM   #20
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Quote:
Originally Posted by SVC707
looks like the gmpp has the same mounting for my speedinc rails and will sit lower, but will cost a tad bit more overall after needing drilling for the injectors, and the gmpp needs a different gasket than the oem round gaskets
That's correct...I believe someone on here posted (I think Harlan) all of the gasket p/n for the gaskets from felpro...That was a while back though...
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Old 10-23-2006, 12:27 PM
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