What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Rocket Man]

Fancy AIR block off on those headers!

Damn, good eyes!

 

[Rocket Man]

$500-$600? Aren't these things just stock GenIV intakes? I've seen complete take-off NNBS manifolds for as little as $40 here. Average is $100-$150. Sure, you might need a particular TB, but that's a salvage yard part, too. Injectors rarely go bad and just get dirty at worst. If you wanna start fresh, a cleaning/refurbing service is $200 or less and they'll be like new with a printout of their test results.

I think the TBSS intakes are hard to find used, at least they were when I was looking.

 

[blueinkd]

$500-$600? Aren't these things just stock GenIV intakes? I've seen complete take-off NNBS manifolds for as little as $40 here. Average is $100-$150. Sure, you might need a particular TB, but that's a salvage yard part, too. Injectors rarely go bad and just get dirty at worst. If you wanna start fresh, a cleaning/refurbing service is $200 or less and they'll be like new with a printout of their test results.

Well....that's where I'm missing something. I don't know anything about the swap except for its reference as the tbss intake swap. I'm not fond of used parts or paying for them. I'm considering the cost of new replacement parts.

When you say nnbs manifolds @ 40. Will these swap into my 05 and offer some gains??

 

[RAMurphy]

I also don't think it's worth the $500-600 in these items for the 10-15 rwhp it will offer me. Unless I'm seeing it all wrong.

I installed the TBSS manifold this past year on my 2002 Tahoe. I was planning on installing as part of my 6.0L build, but installed it early. Love it. Good information in my build thread.

 

[Sam Harris]

Well....that's where I'm missing something. I don't know anything about the swap except for its reference as the tbss intake swap. I'm not fond of used parts or paying for them. I'm considering the cost of new replacement parts.

When you say nnbs manifolds @ 40. Will these swap into my 05 and offer some gains??

The TBSS & NNBS intakes are the same. I bought mine NIB, from fleaBay, and paid $180 or so. (As it still sits in its box..)

 

[RAMurphy]

$500-$600? Aren't these things just stock GenIV intakes? I've seen complete take-off NNBS manifolds for as little as $40 here. Average is $100-$150. Sure, you might need a particular TB, but that's a salvage yard part, too. Injectors rarely go bad and just get dirty at worst. If you wanna start fresh, a cleaning/refurbing service is $200 or less and they'll be like new with a printout of their test results.

I reused my injectors - just need to ensure you get the right fuel rails. You can use your old throttle body but will need an adapter plate. All kinds of good information on how to do this on a limited budget out there. I did a significant amount of research to get this right. There is even a thread under the "Performance" section.

 

[Fless]

I need to do this as well. Thanks for being the guinea pig.. or have you seen good reviews of these elsewhere?

I did, but it's been a while so I'm not sure where. I see somewhat less expensive pairs but wanted to go with a familiar brand; I think I used Strong Arm on my '83 Plymouth Turismo that had the heavier hatchback with the spoiler and louvers, and they worked fine on that. My first brand new car, shown in the Land of Lincoln right before I moved to Colorado. 2.2L 5 speed manual.

For the Hoe I used #4557 for the liftgate. A few months back I changed the glass struts with #4185.

 

[iamdub]

I think the TBSS intakes are hard to find used, at least they were when I was looking.

Intake manifolds from an actual TBSS, sure. But, you can get the same thing from a Gen4 4.8/5.3 engine, and likely at a much lower cost because it doesn't have that "TBSS" notoriety attached to it.

Well....that's where I'm missing something. I don't know anything about the swap except for its reference as the tbss intake swap. I'm not fond of used parts or paying for them. I'm considering the cost of new replacement parts.

When you say nnbs manifolds @ 40. Will these swap into my 05 and offer some gains??

I meant used take-offs at those prices I listed. If you only buy new, then disregard my post. But, to directly answer your question- Yes. Swapping on a standard GenIV ("NNBS") intake manifold from a 4.8 or 5.3 (6.0 and 6.2 use rectangular port heads and manifold) is the same as swapping on an intake manifold from an actual TBSS. You can look at it as GM making the TBSS the standard IM for the GenIV engines. It's kinda like how they made the compression ration and cam specs (minus the AFM lobes) in the LMG (GenIV) the same as the famed L33 (GenIII). There are minor differences you'd have to account for such as the combination of correct fuel rails for the injectors you're running and there was a minor change in the '09+ manifolds for a vacuum port.

 

[iamdub]

I reused my injectors - just need to ensure you get the right fuel rails. You can use your old throttle body but will need an adapter plate. All kinds of good information on how to do this on a limited budget out there. I did a significant amount of research to get this right. There is even a thread under the "Performance" section.

I thought it was you that did the conversion recently. I started digging through your thread and was like, "Oh, it wasn't him. He's still building his engine" and moved on to dig elsewhere, thinking it was a guy in Florida.

Out of all the used car parts one could buy, the intake manifold and injectors are among the safest. The manifold isn't a wear item and injectors rarely fail short of super high mileage.

 

[blueinkd]

Intake manifolds from an actual TBSS, sure. But, you can get the same thing from a Gen4 4.8/5.3 engine, and likely at a much lower cost because it doesn't have that "TBSS" notoriety attached to it.




I meant used take-offs at those prices I listed. If you only buy new, then disregard my post. But, to directly answer your question- Yes. Swapping on a standard GenIV ("NNBS") intake manifold from a 4.8 or 5.3 (6.0 and 6.2 use rectangular port heads and manifold) is the same as swapping on an intake manifold from an actual TBSS. You can look at it as GM making the TBSS the standard IM for the GenIV engines. It's kinda like how they made the compression ration and cam specs (minus the AFM lobes) in the LMG (GenIV) the same as the famed L33 (GenIII). There are minor differences you'd have to account for such as the combination of correct fuel rails for the injectors you're running and there was a minor change in the '09+ manifolds for a vacuum port.

Thank you for clearing this up. I keep my eyes peeled for a deal on some low mileage injectors and TB

 

[iamdub]

Thank you for clearing this up. I keep my eyes peeled for a deal on some low mileage injectors and TB

This is the way. Some people or places value parts based on the vehicle they're from. An IM from "just an old work van" might be cheaper than one from a nice Silverado LTZ yet be exactly the same. Just like how, back in the day, a 6.0 from a Silverado SS was often pricier because it came from a special/rare truck while the 6.0 from an Escalade was sometimes cheaper because it was just a V8 from grandma's SUV. Yet, they were the exact same LQ9. For my S10, I bought an LQ9 from an Escalade cuz it was cheaper and was far less likely to have been beat on. Get the injectors professionally serviced and you'll be set in that aspect. Most places do the same work for around the same prices: Impedance test the coils, disassemble, ultrasonically clean, back flush, replace the "soft parts" (O-rings, pintles, caps, etc.), flow test for volume and spray pattern and return them with a printout of the results. I've used Injector Rx in the past and was happy. Was actually researching other places today just for comparison, but I'm gonna stick with Injector Rx.

 

[Rocket Man]

Intake manifolds from an actual TBSS, sure. But, you can get the same thing from a Gen4 4.8/5.3 engine, and likely at a much lower cost because it doesn't have that "TBSS" notoriety attached to it.




I meant used take-offs at those prices I listed. If you only buy new, then disregard my post. But, to directly answer your question- Yes. Swapping on a standard GenIV ("NNBS") intake manifold from a 4.8 or 5.3 (6.0 and 6.2 use rectangular port heads and manifold) is the same as swapping on an intake manifold from an actual TBSS. You can look at it as GM making the TBSS the standard IM for the GenIV engines. It's kinda like how they made the compression ration and cam specs (minus the AFM lobes) in the LMG (GenIV) the same as the famed L33 (GenIII). There are minor differences you'd have to account for such as the combination of correct fuel rails for the injectors you're running and there was a minor change in the '09+ manifolds for a vacuum port.

I didn’t know they were the same, never heard that. Or else I did and forgot, totally possible. I remember I didn’t do any of that because I ended up supercharger instead.

 

[mattbta]

I'm curious about intake upgrades...I've got a return style system with two fuel lines. Not super interested in adding the corvette piece, but if my rails/injectors swap over and then it is just a matter of throttle body adapter, might be easier than I thought. Also not interested in the unobtainium/spendy electronic TB device at this point.

 

[iamdub]

I didn’t know they were the same, never heard that. Or else I did and forgot, totally possible. I remember I didn’t do any of that because I ended up supercharger instead.

Yaaas. Boosting circumvents a lot of small shortcomings in one fell swoop. Belt-driven intake manifold FTW!

 

[RAMurphy]

I'm curious about intake upgrades...I've got a return style system with two fuel lines. Not super interested in adding the corvette piece, but if my rails/injectors swap over and then it is just a matter of throttle body adapter, might be easier than I thought. Also not interested in the unobtainium/spendy electronic TB device at this point.

Yes, having the return style (two fuel lines) does complicate the install. I spent a significant amount of time trying to find a two line fuel rail that would fit the TBSS intake manifold. Supposedly they are out there but not in my area or anywhere I could find, so I went with the corvette filter and made it work. I also bought a new throttle body to take advantage of the bigger opening of the intake manifold. I do have the throttle body adapter which I purchased as a just in case thought. It's been installed now for 6-8 months now with a tweak tune from Black Bear Performance. I absolutely love it.

 

[Walchit]

Installed two new StrongArm (no, not Franklin D. Azar) liftgate struts. Now it raises by itself when I unlatch it. The cold temps in winter will be the real test.

View attachment 398064

I used to work out west, I remember the strong arm, lol

 

[ncalvo]

200!

 

[blueinkd]

Both heads at the machine shop for a valve job and cleaning. Having them replace the valve stem seals and new springs as well. Should have them back Tuesday. One of my lifters had pitting on the roller, causing the noise.

Well.....pulling the engine. Got the heads back and as we were pulling the cam, here comes a cam bearing. My buddy noted it was probably loose already. I was watching him baby the heck out of the cam as he pulled it and spinned it out. Can't really complain at +300k miles.

 

[MassHoe04]

200!View attachment 398308View attachment 398309

Welcome to the 200k Club! I'm about 213k now...

 

[Walchit]

Well.....pulling the engine. Got the heads back and as we were pulling the cam, here comes a cam bearing. My buddy noted it was probably loose already. I was watching him baby the heck out of the cam as he pulled it and spinned it out. Can't really complain at +300k miles.

#4 came out with my cam, started the whole scope creep thing, lol