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GT2-3 right for longtubes?

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Old 05-17-2008, 06:57 PM
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Default GT2-3 right for longtubes?

I've almost decided on the GT2-3 cam from searching the boards extensively for my LQ4 + Radix 112 + WCCH stage 2 heads + T56 build but I've hit a snag. I've read conflicting reports as to which cam responds best to this combo PLUS longtubes. I've read that the GT2-3 was designed for use with stock manifolds and might not take full advantage of the better flowing exhaust. Anyone?
Old 05-17-2008, 07:36 PM
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I dunno... in know of a few memebrs who run LT's with the GT2-3 with no problems...I did for a while but there was advance in the cam grind and i think it was out of sink with my set up so i switched do a different one.
Old 05-17-2008, 08:10 PM
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I heard the same thing about that cam. I have it in my truck with stock manifolds,but i have a set of dynatech headers waiting to install, but not sure if it will help or hurt. I fell like the cam has alittle less bottom end then the stock but makes up for it in the upper end.
Old 05-17-2008, 08:17 PM
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Add the cam...forget the heads. The 112 won't supply enough air for much more on a 6.0L. The T56 sounds like a lot of fun though.
Old 05-17-2008, 08:28 PM
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Originally Posted by old motorhead
Add the cam...forget the heads. The 112 won't supply enough air for much more on a 6.0L. The T56 sounds like a lot of fun though.
Well I've already got the heads..and was deciding on a cam choice. Which direction should I go now?
Old 05-17-2008, 08:34 PM
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I'm in a simalar situation and I'm going with a bigger blower. A 6.0L maxes out the 112 with just a few bolt ons. 122 is on order for me.
Old 05-17-2008, 08:39 PM
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Well crap...would stock LS1 manifolds be a restriction for the 112 + GT2-3? I ask this because the longtubes are way too expensive, but not near as much as a 122.
Old 05-17-2008, 08:43 PM
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Not intending to ***** up your thread, but if a blower was "maxing out" would you be dropping boost in the upper rpms? I would think as long as you are holding your max boost through your shift points, you are OK, right?

Last edited by BigCountryx; 05-17-2008 at 08:48 PM.
Old 05-17-2008, 08:55 PM
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I'm guessing here, but I'd bet that stock manifolds won't cost you too much HP on a 6.0L, with 112, a mild upgrade on the cam, and a free flowing exhaust. You can spend a whole of $$$$$ in a whole lot of places and you won't get a massive HP increase with a 112 on top of the motor. It only pumps so much air plain and simple.
Old 05-17-2008, 09:15 PM
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I wanted to go with the long tubes also,but the $1100 price tag changed my mind.But i did get the JBA shorties and they seem to work really well with the GT-2 cam.Truck pulls real hard all the way to 6700rpm.


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