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FAST 102 or FAST 92 346/LS6 engine

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Old 08-22-2012, 05:51 PM
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Default FAST 102 or FAST 92 346/LS6 engine

Ok...

I'm on the fence here. I initially wanted a FAST 92, but after looking at the cost, the FAST 102 is actually cheaper.

My delimea is....One day or if my motor blows I'm upgrading to the LS3.

Because of the expensive cost of these intakes, I'm considering re-sell value. I know the FAST 92 seems to be a better "re-seller", but the FAST 102 I'm told flows like a ported 92.

Do I compromise a few ponies to be able to re-sell it later? I have this feeling with the internet myths out there, re-selling a Cathedral 102 might be difficult....

I have an emission free 346, ported 243s, 228R cam, LT, true duals, Man trans.

Thoughts?
Old 08-22-2012, 07:57 PM
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102 is worth more new or used and its a better manifold.
Old 08-22-2012, 08:00 PM
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from what I have seen in testing the 102 intake makes 4 more hp then a 92mm intake with a 92mm TB.with the 102 you will need a ls2 fuel rails.I say stick with your current combo and save up for a ls3.
Old 08-22-2012, 08:02 PM
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Originally Posted by garygnu
from what I have seen in testing the 102 intake makes 4 more hp then a 92mm intake with a 92mm TB.with the 102 you will need a ls2 fuel rails.I say stick with your current combo and save up for a ls3.


I don't have an Intake at all....

I have a LS2 and a LS1 rail...I can go either way.
Old 08-23-2012, 06:51 AM
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The stock ls1 fuel rails will not fit over the 102. You need the ls2 rails or aftermarket to make it work. And idk where this guy is getting only four horsepower but there is to many different combinations out there to put a number on it.. but ultimately the 102 intake brings more power in the end.
Old 08-23-2012, 08:13 AM
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Fast 102 is cheaper? No. Easier to install? No. Gains over a 92 on a 346? Probably not. Bet you can guess what intake is on my car
Old 08-23-2012, 08:51 AM
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Originally Posted by 01ssreda4
Fast 102 is cheaper? No. Easier to install? No. Gains over a 92 on a 346? Probably not. Bet you can guess what intake is on my car
The cheapest FAST 92 I could find is $834 shipped. The cheapest FAST 102 I could find was for $720 shipped. Both Brand new.

I have researched the install and seems the Fst 102 TB is the issue, I plan to run a 92mm
Old 08-23-2012, 08:53 AM
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Originally Posted by reeperz28
The stock ls1 fuel rails will not fit over the 102. You need the ls2 rails or aftermarket to make it work. And idk where this guy is getting only four horsepower but there is to many different combinations out there to put a number on it.. but ultimately the 102 intake brings more power in the end.
I have both rails at my leisure.
Old 08-23-2012, 09:48 AM
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Your resale value might take a hit due to the higher initial cost of the 92....
Old 08-23-2012, 10:08 AM
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Fast 102 is cheaper? No. Easier to install? No. Gains over a 92 on a 346? Probably not.
Pretty sure the 92 is not cheaper.

Pretty sure a manifold is the same to install regardless of the opening size in the front.

Pretty sure a radical H/C 346 will benefit from having a 102 over a 92.

But hey, if it works for you it works for you.
Old 08-23-2012, 10:08 AM
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If you are going to the ls3 set up later then just save your money. If you are really intent on changing your set up right now I would go with the 92 because you don't have to buy a new fuel rail to make it work.
Old 08-23-2012, 10:11 AM
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Originally Posted by badazz81z28
The cheapest FAST 92 I could find is $834 shipped. The cheapest FAST 102 I could find was for $720 shipped. Both Brand new.

I have researched the install and seems the Fst 102 TB is the issue, I plan to run a 92mm
If your going to run a 92mm throttle body then why would you buy a 102 intake, your not gonna get any more air into the intake just because the opening is bigger, the 92mm can only flow so much. I would actually think it would be bad, air would be rushing through the 92mm opening then get into a bigger area in which the air would slow down (less pressure), I'm not sure if that is how that works but seems like that would make sense....
Old 08-23-2012, 10:23 AM
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102 is a better manifold. The actual internal structure of the manifold was changed, so it's not just the difference between a 92/102mm TB. I've seen as much as a 10rwhp/14rwtq advantage for the FAST 102 to 92 both with the same tune and a 92 TB...
Old 08-23-2012, 10:45 AM
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That's not at all how it works...it doesn't matter if your tb is 4ft in diameter, the engine is only going to use what it wants. The 102 provides gains in the runners, not tb size.
Old 08-23-2012, 10:47 AM
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Oh, and BTW the 102 is more difficult to install.
Old 08-23-2012, 11:02 AM
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so what your saying the 92mm throttle body (which flows about 1200 cfm), will make more power because its going into a bigger intake? I feel like your not getting any more air into that intake... The motor is only going to use what it needs, yes, but I feel like gains would be minimal, if any, on a 346 that doesn't have a massive cam and a nice set of heads. You would lose out on low end torque as well, no?
Old 08-23-2012, 11:39 AM
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Unless your maxing out the tb, going to a larger one will not help, or hurt. The physical size of the intake opening has little to no effect on power, it's simply room to grow. Which is why 102 intakes are great for stock 346's to 450+ cube monsters.
Old 08-23-2012, 11:45 AM
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You've answered your own question. You already have the ls2 rails. Why not prep for room to grow later down the road? Get the 102 intake.
Old 08-23-2012, 12:05 PM
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Yes, The theory is the better runner design. Which air flows down into the engine more efficiently
Old 08-23-2012, 12:06 PM
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Originally Posted by Lockdown99ss
You've answered your own question. You already have the ls2 rails. Why not prep for room to grow later down the road? Get the 102 intake.
Because you can't convert the Cathedral port 102 to Rect port. I'm considering re-sell value if need be.


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