I am about to swap my ls6 intake to a Fast 90 intake and tb, will i benefit with getting the tune tweaked or should it be fine ?

 

Mine was running a little lean after the FAST install. Before it was almost spot on, so I'm having mine retuned...

 

I hear ya, i mind as well, i need to get my speedo calibrated for the 4.46 gears

 

I'd go ahead and retune it. I went from a ls1 intake/throttle body to a fast 92 intake/92 throttle body and a cutout and picked up 61 rwhp.

 

I'm always in favor of a retune after any mod

 

IMO it's mandatory to tune after installing a FAST intake to maximize the performance gains and driveability. Every install I've seen the LTFT's and overall tune go pretty lean.

 

Yea, it needs to be tweaked. Like said to get the full benefits.

 

did mine from ls6 to fast 90/90. retuned picked up about 25hp.

 

the intake manifold will increase the air entering in so you will need a re-tune

regards

 

Its easy to figure out. If you install a part that is supposed to give you more horsepower you better need to be retuned.
If not,
1) the first tune was wrong
2) the new part did not give you anymore horsepower and you wasted your time and money.

 

You need a retune cause all of these guys said and;
-lean is not good
-your idle will be shitty

I went for a retune after my swap, cant pass on this IMO..