Well I will be honest I dont know **** about fast intakes. But if you mill heads etc you have to modify the intake to fit. But it sounds like they are problematic and expensive to boot.

 

just figured id post this since ive gotten some questions about if im running a rectangular port instead of a cathedral port and were the brake booster port is to supply the booster with vacuum

cathedral left rectangular right



LSXRT INTAKE PORT


STOCK TRUCK INTAKE PORT


as far as were the brake booster port is its mounted on the stock intake here at the top left of picture



the brake booster port on the LSXRT is down the bottom right of the picture

 

Good ole JB weld. So your no useing that port for an FPR? I have mine hooked up to the FPR, I know boosted applications do this but someone else on the forum said that it would not kill it. Also I wanted to see how the catch cans are hooked up.

 

reason that got blocked off is the nipple was busted off during shipping and im using the stock FPR setup with stock rails

 

Sorry guys, I totalled the truck back in june but was able to get most of the engine mods off before it went off to salvage. Attached below are a few links: the first is the dyno at LMR before the tune and major intake leak. The second link is after I installed the catch cans and got everything figured out but I still needed to tune it. You can hear how choppy it was at idle which was caused from the throttle body trying to compensate. The third is a pic of the old setup. Notice that there is a 3/8" hose that I had connecting the vacuum port on the drivers side manifold to the stock PCV port on the drivers side rear valve cover (this was not correct). I later used this port to connect the brake booster. However, I will be reinstalling all of my bolt ons onto my cousins truck in two weeks when he gets home from offshore, I will take pictures then and post them up so that you guys can get a tangible picture. I loved my LSXRT intake at first, then I hated it b/c of the issues........but once everything was sorted out, it was well worth the pain.



Chevy Truck Forum | GMC Truck Forum - GmFullsize.com

 

well figured id update this thread on what i ended up doing i got a really good deal on a TBSS/NNBS style intake from a member truck runs pretty damn good still gotta be tuned its running pig rich but otherwise im happy.

 

How does that intake feel down low? Pick anything up over the stock 99+ truck intake you think?

 

Well, I just finished up LSXRT intake and tune and I would say mine Idles better with the intake than it did before. But I also did log the crap out of My VE table and then did RAFIG and RAFPN with efilive. Only problem I had was having to make brackets to fit the 60lbs injectors with their fuel rails that they claimed would work with the inake. I could of just bought the cheap universal kit and made my brackets had I known this was going to happen.

Other than that no problems.

 

definitely better threw the whole rpm range over the stock 78mm setup and its not even tuned yet
im pretty sure its the tune but i just got tired of pulling the intake off so i just did the TBSS/NNBS setup and so far im very happy with it

 

How's the TBSS/NNBS intake doing for you?