Is it worth it to upgrade to fast intake?
Thread Starter
On The Tree
Joined: Jul 2012
Posts: 189
Likes: 0
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.
Trending Topics
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
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
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Thread Starter
On The Tree
Joined: Jul 2012
Posts: 189
Likes: 0
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
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
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
Joined: Mar 2014
Posts: 95
Likes: 0
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. 
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
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.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
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/