Recently I got a Lq9 for a swap that I知 going to put in a 58 Chevy truck. I知 having new gaskets, seals, oil pump, cam, etc replaced. I was wanting a Holley 300-137 intake. But the tuner suggested a sheet metal intake like the Holley sniper. He says that I need a MAF sensor for it to run best by far. I really don稚 know but from everything that I read about sheet metal intakes is not good. Just need a good intake for NA street machine

 

If you don't mind the way it looks - the truck intake performs very solidly with lots of torque down low, just where you need it for a "NA street machine."

 

If you're not modifying the engine, headers, cam,etc, the intake wont do much.

 

232/236 cam. 3.90 gear, headers, stock heads.

 

Still use the truck intake. It's as good as the LS3, which is an excellent unit. Sheet metal intake will be a waste of money.

 

I would use a TBSS or NNBS 4.8/5.3 truck intake.

 

Has the LQ9 got the cathedral ports or the oval ports? Assuming it's an oval port head, I think the truck intake will outperform the LS3 intake on the bottom end a bit (longer runners) -- it was designed to move 4500-6000 lb vehicles. And the LS3 will be a bit better on the top -- but there's not gonna be a ton of difference between the two, unless of course, you're building something that needs to breathe and BE consistently up in the 6500-7500 rpm range, or higher. Doesn't sound like that's the goal. 'Course, it's hard to out-ugly the truck intake.

 

These guys know what they're talking about. Unless your building a "show" truck, you can cover the ugly truck intake up with a bunch of options. (And it will be a lot more "budget friendly" than either Holley intake...

 

That seems to be the case, either an ugly intake that functions well and looks like a turd or a cooler looking Chinese sheet metal intake that does pretty much nothing but look cool. So it’s functionality over cool factor.

 

I just smoothed out the "ugly" intake and painted it to match the car. Cost of doing this is next to nothing and you have room under the hood.

 

That's 10 kinds of awesome sir! The next one you should have the throttle body inlet the gates of hell or something.....

 

The stock intakes don't get enough respect. They actually are pretty good and will work great for most cruisers. While aftermarket ones can get you more power it's usually just at higher rpm's at the expense of low end power. Of course the aftermarket ones do look cool though

 

Truck intakes will be fine. From dyno plots that I have seen, the sniper will lose low and mid range torque compared to a truck intake. They are typically shorter runners that you'd want for the street.

The truck intake will do fine. Depends on your goals, I guess.

My 71 GMC Jimmy has an LQ4, with a 223/231 cam, headers, ported stock heads, 4" intake, 3200 stall, 4.56 gears with 33" tires. That combo felt great on the street, should be a good bit more than 400 hp.

For this year, I just switched to a Trailblazer SS intake manifold and a 92mm WARR throttle body, as well as switching from the stock GM ECU/HP Tuners, to Holley Terminator X Max.

The new setup feels stronger, and throttle response is really good (likely just that the new TB is bigger so lets in more air for the same pedal movement).

The TBSS is the best of all of the cathedral port manifolds.


Read through this if you haven't yet, it's on a 6.0 with flat tops, will be pretty close to your setup (other than the heads). You can get a sense of Sniper vs Holley mid rises in the 2nd link. The sniper is maybe worth ~5hp/tq over the mid rise in this application.

https://www.hotrod.com/articles/20-l...ifolds-tested/
https://www.hotrod.com/articles/gian...dyno-shootout/

Look at the average HP and Torque losses on the Holley mid rise.

Truck intake:

Peak Power: 549 hp at 6,900 rpm
Peak Torque: 481 lb-ft at 5,000 rpm
Ave HP (3,000–7,000): 431.2 hp
Ave TQ (3,000–7,000): 450.8 lb-ft
TQ at 4,000 RPM: 454.5 lb-ft

TBSS Intake:

Peak Power: 562 hp at 7,000 rpm
Peak Torque: 497 lb-ft at 5,000 rpm
Ave HP (3,000–7,000): 444.4 hp
Ave TQ (3,000–7,000): 464.6 lb-ft
TQ at 4,000 RPM: 469.5 lb-ft

Holley Mid Rise

Peak Power: 566 hp at 7,000 rpm
Peak Torque: 469 lb-ft at 5,300 rpm
Ave HP (3,000–7,000): 424.9 hp
Ave TQ (3,000–7,000): 442.4 lb-ft
TQ at 4,000 RPM: 441.2 lb-ft

 

This great information! Lots of help here! Thank you guys so much!

 

As was said, the TBSS is the best factory cathedral intake.
HOWEVER, the Gen IV 5.3 and some 6.0 cathedral head truck intake is EXTREMELY close, if not equal. Plus it uses the 4-bolt 87mm TB.

 

Sorry for the ignorance, but is the TBSS intake the same as the L92 intake?

 

The TBSS intake is for cathedral intake port heads. The L92 is a 6.2L rectangular port head engine. So no, the intakes are not alike. The L92 intake is for rectangular port heads.