zero2sixT

iTrader: (4)

Had my '03 dyno'd the other day. Tuner saw manifold pressure dip to 93 kpa. Thats with a 3" cai and a 90mm gold blade. He recommended running the holley hi ram. From the little I could find on a n/a 6.0 running this intake, it loses a lot down low.

I don't really want to port my intake. I'd like to take a shot at running a lsxrt. He said that it could be tuned, but that I really don't want to f*ck with it. I've also been looking at the pro-flo xt. Just looking for some input.

Mods are: AFR 225s, 230/236 .581/.581 114 comp cam, 1-3/4" LTs, full 3" single exhaust

Thanks for any help

03sierraslt

iTrader: (22)

How do you know it's coming from the TBSS intake? Could be from anything in the intake stream. What was atmospheric at the time?

Vortec350ss

iTrader: (20)

a 3" cai is only a hair under 76mm... could be that.

Beatdown Z

iTrader: (18)

I agree with this dude^^^^

zero2sixT

iTrader: (4)

I don't know what the da was. I know average humidity was 86 and probably low 50s. Prob ~20' above, sea level maybe less. Sea level psi was 30.97

He also brought up the cai. Thought about building one. But would it cause 93 kpa across the manifold?

Vortec350ss

iTrader: (20)

I would think if there is vacuum in the manifold the restriction would tend to be before the manifold...

03sierraslt

iTrader: (22)

It absolutely could and would, hell the air filter can cause that in the intake. Anywhere between the restriction and the intake valve will show the KPA drop.

zero2sixT

iTrader: (4)

Lol, he did make fun of my air filter.

Do y'all think just swapping the air filter is enough? Or should I go 4" with the tubing?

Thanks for the help.

Vortec350ss

iTrader: (20)

If it were me I would absolutely go 4" with a new filter... why go through the process 2 times? You have something (sounds like multiple things) choking you on the intake side, just do it right.

03sierraslt

iTrader: (22)

4" inlet doesn't do a whole lot going through a factory MAF.