Is it worth it to upgrade to fast intake?
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On The Tree
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Is it worth it to upgrade to fast intake? I have a 98 turbo ls1 Trans am, ported 243 heads, blower cam, 76mm turbo. Anyways I was bored and decided to check for boost leaks, boost has been kinda inconstant, and I found my ls6 intake manifold cracked right where the #1 injector goes in. Thought it was an odd place to crack, but it leaks. Is it worth it to spend the money and upgrade to a fast intake or just buy another ls6 intake? Only running about 10-11 psi on this set up
Pressure test a fast and see they don't hold like a factory intake. They give more HP but they are made cheaper than factory intakes. If I ever decide to boost a car I will have a factory intake. Others will disagree.
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From: Norn Iron
I have a 98 turbo ls1 Trans am, ported 243 heads, blower cam, 76mm turbo. Anyways I was bored and decided to check for boost leaks, boost has been kinda inconstant, and I found my ls6 intake manifold cracked right where the #1 injector goes in. Thought it was an odd place to crack, but it leaks. Is it worth it to spend the money and upgrade to a fast intake or just buy another ls6 intake? Only running about 10-11 psi on this set up
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Thread Starter
On The Tree
Joined: Jul 2012
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I put a little epoxy on the crack and it seemed to seal for now. Just a temp fix, guess I'll be looking for another ls6 intake. Thanks for the input. If I want more power I'll just crank up the **** lol
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From: Norn Iron
Given the silly prices some ask for an LS6, if you can get a good deal on a suitable FAST, I'd go for it.
Or, whether some like them or not, the alloy BBK, Weiand etc arent bad at all and you can usually find deals on them.
They seemed to fair a little better mid range than the LS6 intake in that recent test. Not enough to make a swap for example...but you're in a situation where you arent swapping, but looking a replacement intake.
The steel base plate that came with the BBK I used seemed crap though, so I made a thicker alloy replacement. Steel one looked like it would flex very easily under boost.
Or, whether some like them or not, the alloy BBK, Weiand etc arent bad at all and you can usually find deals on them.
They seemed to fair a little better mid range than the LS6 intake in that recent test. Not enough to make a swap for example...but you're in a situation where you arent swapping, but looking a replacement intake.
The steel base plate that came with the BBK I used seemed crap though, so I made a thicker alloy replacement. Steel one looked like it would flex very easily under boost.
Staging Lane
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I honestly would go with an edlebrock intake of some sort. Instead of spending all that money. You should have the ports matched and casting burs smoothed out, but for the money, I'd go that route and REALLY crank the boost up later on down the line. 
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From: Norn Iron
carb intakes mostly suck, and their ProFlo that wont actually fit....wont really yield any benefits until after 6-6500rpm or so.....if his engine even revs that far.
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From: Norn Iron
This is what many refer to. Of course it will vary from engine to engine, setup to setup, but it's still a good test
http://www.hotrod.com/features/1507-...ifolds-tested/
http://www.hotrod.com/features/1507-...ifolds-tested/