Originally Posted by Launch

I'm all for that idea . If you do it, definitely get a 4500 throttle body. A 4150 will be a bit small for your set up.

I shouldn't even be telling people how good it is lol. But i installed a Super Vic intake with 1375cfm 4150 throttle body recently on my cam only 346ci just as an experiment, with no other changes, and the car is much quicker all over than previous ls6 intake/ported tb.

1st gear traction off the hit on the street is now gone.. i now need to peddle it to move out. It feels like i went from my current 4000 converter, to a 5500 if not more or i added 100ft/lbs torque at 4000 rpm, that's how much more potent the super vic/4150tb is over the stock ls6 intake. My car now has more torque WOT off the hit than i ever imagined a stock 241 headed n/a 346ci could. It just dwarfed my 28x14.5 hoosiers.

To be clear, this is with 1 7/8 headers into 3" y-pipe into single 4" open exhaust. I can imagine with a restrictive exhaust the gains might not be the same.

I now need better suspension/ballast to get the car back to how it was. With previous set up, on the street the car would almost dead hook WOT from the hit and i'd never lift. Just mash the throttle and go. Now with the single plane set up it has no chance of doing that on the street. Not a bad thing as i can now work on getting the car to hook better in preparation for my better engine, which the car was going to need anyway. I've spent nothing on suspension so far, other than the rod end offset lca's and panhard. I still have the eibach lowered springs and cheap kyb shocks the car came with, and stock torque arm (just strengthened with steel plate) with bmr relocation.

Your peak power also won't drop off, you will carry it another 800 rpm at least with a single plane. It completely transforms the car, for the better. With the super vic intake i'm shifting at 7800rpm. It wants to go even higher but i decided that's enough, i will give the sbe and stock lifters a chance to survive a while longer so i can do suspension work.

First time you hit the throttle you won't regret doing a single plane swap for a second, other than you will want more traction on the street. It also looks cool imo . Sorry for the long write up , but i read your comment and i got excited for another 4th gen owner to feel how really potent the LS can be (is) ! All these years i was a plastic intake fan also, i'd fallen for the hype, until i thought let me entertain myself, and $1500 later, i'm sold. No more plastic intakes for me ever. The car is a whole new level of fun with this set up. It might not be for everyone. My car is fairly gutted (light), spooled S60 with 3.73's and 4000 converter th400, with open 4" exhaust. It is set up to go quick wide open throttle, and i don't care to spin the engine high.
If a super vic intake is this good on a cheap cammed 346ci, then imagine it on a real engine like your high compression 441ci.

Originally Posted by BennyB

sounds like a pretty rowdy setup, you ran it at the track yet? Sometimes I wish I would have taken my sbe cam only setup a little farther, but I did hit my goal of 6.90’s in the 1/8th with it. I’ll see what this thing does now and then decide from there on changing the intake runners or dive in and swap intakes and tb’s.

Originally Posted by hiltsy855

Nice! ~6.30's gets you into the 9's. How's the track at I-29? I heard the road course is rough....