Installing a LS6 Intake and Porting it...Need Help
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 2,204
Likes: 5
From: Bethlehem PA
St. Jude Donor '03-'05-'06-'08-'10
Installing a LS6 Intake and Porting it...Need Help
OK guys, know a lot of you have done this mod. Need some help regarding is this a straight forward install on a '98...any words of caution/recommendation?
Also, what is port gasket matching all about...is this a Dremel tool exercise??
Appreciate the help and thanks!
Joe
Also, what is port gasket matching all about...is this a Dremel tool exercise??
Appreciate the help and thanks!
Joe
Drifting
Joined: Apr 2001
Posts: 1,779
Likes: 6
From: LOS ANGELES CA.
Re: Installing a LS6 Intake and Porting it...Need Help (C54FUN)
The manifold should be pretty smooth right from the factory.I would think you would want to match the intake to the block for alignment.Anybody agree or disagree?I have never looked inside the manifold,but I would think the material the manifold is made from should besmooth enough for fuel flow.I read in a Hot Rod magazine a little turbulance is bettr than none.The alignment is much more beneficial to the perfomance of the engine.Being an expert on nothing I have an opnion on everything. :chevy :chevy :flag :chevy :chevy
Drifting
Joined: Mar 2000
Posts: 1,961
Likes: 135
From: Maryland
Re: Installing a LS6 Intake and Porting it...Need Help (ROD BROWN)
I recently ported the cylinder on my dirtbike.
I port matched everything so there aren't any steps between mating surfaces.
All major casting imperfections were removed.
Intake only semi polished.
Exhaust and head polished to look like a mirror.
Of course I also changed port size and timing (2 stroke).
The theory I've heard is that you want to leave the intake kind of rough. Laminar flow will actually decrease the effective area of a port/runner due to a boundary layer building up along the walls. Leaving it rough will create turbulence and break up the boundary layer. On carb'd engines, the turbulence also helps to keep the fuel in suspension.
Exhaust flow is already turbulent enough to break up the boundary layer.
I haven't done any calculations to see if thats correct, but it sounds believeable.
I port matched everything so there aren't any steps between mating surfaces.
All major casting imperfections were removed.
Intake only semi polished.
Exhaust and head polished to look like a mirror.
Of course I also changed port size and timing (2 stroke).
The theory I've heard is that you want to leave the intake kind of rough. Laminar flow will actually decrease the effective area of a port/runner due to a boundary layer building up along the walls. Leaving it rough will create turbulence and break up the boundary layer. On carb'd engines, the turbulence also helps to keep the fuel in suspension.
Exhaust flow is already turbulent enough to break up the boundary layer.
I haven't done any calculations to see if thats correct, but it sounds believeable.
