SDPC Tech Tips: Cathedral Port Truck Intake Upgrade

We cover the big differences between your stock intake and the "TBSS" intake manifold, along with what to watch out for when you are performing the swap.

Parts featured in this video:

2006-08 TBSS Intake (Has PCV Hole):

2009 TBSS Intake (Has PCV Nipple):

Torque Rush X-Link:

Nick Williams Throttle Body:

SDPC Cable Throttle Bracket:

#SDPC #SDPCRaceshop #TechsualHealing #TechTips

[silvergrandam]

Need to go over injectors and what you need

[bluecollarhotrods]

Literally used that exact bracket and throttle body on my swap. (2001 Silverado 1500 with an LQ4/80E swap) The only issue I encountered was that my cruise cable has too much slack. I solved it by crimping a lead fishing weight on the cable. For the fuel line, I used a C5 Corvette fuel tank transfer hose with the C5 fuel filter. It is plug and play, looks factory, and keeps the fuel lines from being up against the firewall. I am 4 years and about 25K miles on intake swap with no issues.

[juaniequintero]

Do more Silverado upgrades please great video by the way keep it up

[shaneintegra]

Strange. Could have sworn "Richard Holdener" also dyno tested this and it made more power on a stock 5.3

[deankay]

I like torque and if I gain some horse-ponies so be it. A daily driver is not going to see 6k or 7k RPM everyday or perhaps ever. Has anyone tried to more with the truck intake other than shave it to look pretty. Has anyone cut the cone out of the center near the Throttle Body that forces air to the center first, before this air is dispersed front and rear? Some clean up and porting can be done to match the ports better and have some positive results. Now aftermarket intakes do away with this centering tube. Working on V6 imports, some incorporate a vacuum valve to change from long air stacking to short air flow at 3, 200 RPM’s.
With that, the budget minded guy/gal who spent their retirement putting 3-4 kids thru college. As an ASE master tech since 1978, I’ve seen Nissan place an intake gasket with a counter-clockwise triangle in the port to increase low pressure rotation to help complete combustion burning and performance. Both may have benefits as we both know from the 50’s how air in motion, stacks up behind a closed intake, but a straight line is much better for high RPM. I saw this on the highly modified Corvette with carbon fiber bell shaped ends and a throttle valve inside each carbon fiber intake tube. They designed it to synchronized with 4 left and then to 4 right. Cable driven at one location of course, but a red-line starting at 9k on the dashboards tach. I find it interesting of what people & engineers come up with.
Like the famous “Smokey Yunick”, velocity stacks, volumetric efficiency, etc., a tough B-17 bomber pilot who in the 50’s stirred the imagination of thousands of back yard mechanics, only to have son’s who build engines with more horse-ponies than the other guy who gathered pink slips...from car owners. Truck intakes maybe ugly, but still have a place in the “LS” world. Also 2003 utilities had DBW instead of cable but small & 3 bolt. Enjoy learning!!!

[jaredporter]

What about the other port on other valve cover

[armedrepublic]

Great video! To add Glenns auto performance makes an absolutely beautiful and affordable drive by cable throttle linkage adapter for the tbss manifold. Highly rec.

[treybob]

Great info! Where does the feed tube come from that hooks to top of 92mm TB?

[thehoule]

Plus I have the two fuel lines on my 03 classic weird hey not the single fuel line

[autumnjeserich]

Do you need to go to a larger intake tube?

[williamjohnston]

2006 Silverado 1500 with the LQ9. Looking for a factory crate replacement if at all possible. Does this come in a short block only setup, or next question, I would think the cathedral style port heads will bolt up to this block the same as the original. Really what I want is a factory crate LQ9 replacement. Great videos, thank you all very much.

[SplizziePIC]

NO=ow that was a good video and Im not easily impressed. Straight to the the points, hit all pros and cons. Explained everything good even for the less knowledge engine people. Toss in a few plugs for parts and done. Very nice!!!

[charliemccutcheon]

Scoggin-dickey sounds like a Borderlands bandit clan name

[ewitodaaabeaner]

So I have a tbss intake band the manifold in rectangle and he told me this.

Bro that manifold won’t work unless your lq9 has rectangle ls3 style hesds

I got a gen 3 ls 2004 is it a 1q9 or lq4

I showed him pictures of the heads same heads (6.0ls) and he told they won’t fit cause there cathedral and that my manifold is rectangle and he told me they won’t work I just wanted my tbss intake to get ported all the way and a new throttle body someone help me

[valentinzaratevasquez]

What do we do for the radiator hoses that run under throttle body? I have the new one and it doesn’t have the connections

[justinw]

What about the Dorman Chevy Avalanche part # 615-183 intake onto a 2002 5.3? I really like the looks of those stock intakes, Could I just buy the Cathedral port to square port adapter? And convert from return to returnless and convert to DBC?

[stevevanhook]

What problem did you have using the factory o ring from the newer style map on the earlier map sensor? I used this o ring on my swap and had no issues yet and have put over 20000 miles on it so far. I know I had to grid on the map sensor retainer.

[jimbeck]

Were did you get the throttle cable bracket and does it have provision for cruise control?

[thehoule]

Like the info I want to put a 09 5.3 intake and I have everything however what about using the newer 08 injectors do I need a special harness or pigtails again

[kennyoliver]

Yes I have been working on putting a 5.3 into a 94 Silverado. I cut the windshield side of the dash to fit and took an inch out of it to bring the door sides of the dash in closer.so I have an 02 dash in the 94 I'm currently removing the cab harness and fuse panels to put inside. I have the power mirrors installed. The dash is also wider so I'm using some billet aluminum for door panells. My question is what all will it take to make the instrument cluster work. I have everything from the donor truck... Also I'm running a 350 turbo behind the 5.3 that's built. Wanting to keep fuel injection and put two small turbos with can and tune it. What would I need for 3.73 gears 275x60/15 drag radials to get in 6s 1/8 mile and be