LS6 Intake Years (DBW/DBC)?
Thread Starter
Teching In
Joined: Dec 2018
Posts: 25
Likes: 3
LS6 Intake Years (DBW/DBC)? I have a LQ9 i am wanting to run a LS6 intake after i change my accessories to clear a car intake. I have a few questions.
From my google research, it looks like all LS6 intakes are supposed to be cathedral port. Why do they all look rectangular? I have seen many threads asking this question, but a reply stating it "just works", but the ports look nothing like the ports on a truck intake.
I want to do Drive By Cable (DBC). Do i need to get a certain year for DBC or can i get an intake with DBW and just swap out the throttle body with a DBC throttle body?
Thanks,
LQ9bu
From my google research, it looks like all LS6 intakes are supposed to be cathedral port. Why do they all look rectangular? I have seen many threads asking this question, but a reply stating it "just works", but the ports look nothing like the ports on a truck intake.
I want to do Drive By Cable (DBC). Do i need to get a certain year for DBC or can i get an intake with DBW and just swap out the throttle body with a DBC throttle body?
Thanks,
LQ9bu
TECH Senior Member
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
The manifold port is rectangular, but the injector is right above it. IF the head port matched the manifold port, the injector would be blocked. THAT is why the heads are called "cathedral port". To allow the injector to function.
The manifold itself will accommodate both DBC & DBW. It's the TB that handles the difference between them.
The Corvette and Camaro(later) both used the LS6 manifold, but the Camaro was DBC and the Vette DBW. Same manifold.
The manifold itself will accommodate both DBC & DBW. It's the TB that handles the difference between them.
The Corvette and Camaro(later) both used the LS6 manifold, but the Camaro was DBC and the Vette DBW. Same manifold.
Thread Starter
Teching In
Joined: Dec 2018
Posts: 25
Likes: 3
The manifold port is rectangular, but the injector is right above it. IF the head port matched the manifold port, the injector would be blocked. THAT is why the heads are called "cathedral port". To allow the injector to function.
The manifold itself will accommodate both DBC & DBW. It's the TB that handles the difference between them.
The Corvette and Camaro(later) both used the LS6 manifold, but the Camaro was DBC and the Vette DBW. Same manifold.
The manifold itself will accommodate both DBC & DBW. It's the TB that handles the difference between them.
The Corvette and Camaro(later) both used the LS6 manifold, but the Camaro was DBC and the Vette DBW. Same manifold.
G Atsma - thank you for the information and explanation. Just trying to understand though....why does the truck manifold port look cathedral and matches the head port?
TECH Senior Member
Joined: Jun 2016
Posts: 22,293
Likes: 3,617
From: Central Cal.
Just keep cathedral manifolds with cathedral heads, and rectangular with rectangular.
Thread Starter
Teching In
Joined: Dec 2018
Posts: 25
Likes: 3
Stock truck intake
LS6 intake
Trending Topics
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
TECH Resident
Joined: Jun 2011
Posts: 936
Likes: 472
I think what's throwing you off, is the LS6 intakes have a straight flange, which allows them to use a symmetrical rectangular gasket. The truck intake rounds the flange off around the injector port, so the gasket is uni-directional.
If you were to see them in person, you'd see the ports themselves are basically the same.
If you were to see them in person, you'd see the ports themselves are basically the same.