If you are adding forced induction such as a supercharger or turbocharger you should absolutely upgrade the intake system.įor those not going the forced induction route, it depends on your modifications. While it might not make sense on stock LS6 engines, modded LS6 engines certainly have a better case for a cold air intake. Rather than dropping a full intake system in, you are best off dropping in a K&N or SLP filter. When you consider a good intake is $500+, it just doesn’t make sense to upgrade for the 2-5hp gains you will see, and the 5hp number on the high end is probably very optimistic. It is actually so good that a ton of LS1 owners swap LS6 intakes and intake manifolds onto their cars, in favor of aftermarket brands. The LS6 intake is actually built really well from the factory and has plenty of air flow. If you are just looking for a little bit of extra power on your LS6 I would recommend starting with long-tube headers and ignoring the intake as an intake won’t be worth its cost. To cut to the point, on a completely stock LS6 an upgraded intake has very few performance benefits. The stock system was built extremely well and provides Performance Benefits on a Stock LS6 An aftermarket LS6 cold air intake isn’t going to lower IAT’s (intake air temps) over the stock intake system. While these systems are usually called “cold air intakes” the true benefit comes from increased air flow. However, when you begin adding more serious mods, the intake becomes restrictive as it is no longer capable of pulling in enough air to supply the horsepower being produced. Most intake systems, as is true with the LS6, are completely sufficient at stock power levels and when lightly modified. Generally speaking, more power requires more air. The biggest benefit of an upgraded intake is improved air flow. With that being said, traditional bolt-on modifications like a cold air intake can be beneficial under certain circumstances. The biggest power gains on the LS6 will come from long-tube headers, upgraded cams, porting or performance heads, stroker kits, and forced induction. While these LS6 engines can handle a ton of power they aren’t quite as easily modified as forced induction cars. However, for you American Muscle folks looking for more power, a traditional cold air intake system might be on your mind. of torque, the LS6 was pretty stout from the factory for it’s time. It was used in the C5 Z06 Corvette’s and the first-gen Cadillac CTS-V’s from 2001 until 2005 when it was replaced with the LS2. I also heard putting a check valve between the top of the manifold and the OUT to reduce the amount of vacuum being pulled by the manifold, which is a lot by the way.The Chevy LS6 engine debuted alongside its little brother, the LS1, in 2001. Right now what i plan to do is keep the first set up, with both the passenger and drivers side hooked up to a T fitting and into the IN side of catch can, Installing a bad ass Billet Breather filler cap from JEGS and hope it lets by enough clean air to reduce the vacuum, while still maintaining enough vacuum to keep it from smoking. This fixes the vacuum in the crank case and oil filler cap, but BLUE smoke comes out at IDLE non stop. The DRIVERS side goes into the "IN" side of my catch can and the "OUT" to the top of the manifold. So now i have a barb that sticks out of my intake tube, with a line that goes into my PASSENGER side valve cover. The second way i tried was to drill a hole in my intake tube to get fresh filtered air into the PASSENGER valve cover. I knew this, so I tried another way of setting up the catch can and to no avail. Now i know what youre thinking, of course dumb ass, there is no place for PCV to be getting fresh air.
I have BOTH the passenger side, and Driver side valve covers, hooked up to a T fitting that goes into the "IN" side of my catch can and the "OUT" to the top of the manifold.
it has 5k miles on it at the moment.Īlright so I know i have it set up wrong. If i take it off while on it will idle funny and start to smoke blue(oil getting by) The engine is freshly rebuilt so i highly doubt its the piston rings, it was broken in properly i made sure of it lol. Not only that but my Oil Filler cap is under vacuum, it is hard to pull off when the truck is on. I noticed that it was catching a shit ton of oil. The problem I'm having is that my friends and I seemed to have installed the PCV for this manifold wrong or something. Also has a cam, milled 243 heads and full bolt ons, and a ported LS2 DBW throttle body. It is an LQ4 as stated with the TBSS manifold swap. Hello everyone, newbie here, I'm hoping some of you could help me out with this situation I'm having with my truck.