wrath22

undefinedOk now that i have finished the exhauat order i am now focusing on the intake part of my ls1. i have slp air lip, k&n air filter 85mm maf and smotthe bellow. now which intake would complete the rest of the air intake upgrade? not sure what to do with stock t.b. i would like to port and polish it but i don't know whos does that. what intake would give me the biggest gain for power? also how hard are the swap overs from ls1 to ls6 intake? any info would be awesome thanks guys

Diolar Magnum

get the LS6 intake. Way cheaper, just as good. What year is your car? If its 98-00 ( which I am assuming it is) you're going to have to get rid of the EGR *****. there's a write up on that round here somewhere if you search. Good luck

Brad

wrath22

my car is a 1998 good guess. but why do i have to get ride of the egr stuff. when i ordered the kooks headers i ordered them with air and egr fittings.

jrp

iTrader: (16)

because the OEM ls6 intakes dont have provisions for your egr, the slp ls6 intake does however.

check the induction guide for a walkthrough.

transAm-98

iTrader: (1)

i got rid of my egr. the oem intake was $100 cheaper than the slp intake with the egr. plus it makes the engine bay look much cleaner

JB151

iTrader: (3)

Agreed, go with ls6 intake manifold. The FAST LSX intake is superior, but only worth the money if you're pushing some very serious horsepower. Those polished LS6 manifolds look awesome but they also are expensive.

cyphur

iTrader: (10)

those polished LS6 intakes aren't all that much better than the normal one. plus they soak up all kinds of heat...which is bad.

i would have gotten race-type Kooks, if they're not shipped yet see if they can change the order. ditch the AIR and EGR.

wrath22

ok so slp intake is the way to go then? thanks for the info guys

kraut187

iTrader: (2)

At what point should you go with a FAST over the LS6? Is there a roundabout horsepower target you should be aiming for? Over 400 RWHP?

TIA

JB151

iTrader: (3)

Even at 400 I don't think theres THAT big of a difference.

monsterls1

iTrader: (8)

I think more around 600hp,then go with the 90/90 intake and tb from FAST.

jlrz28

iTrader: (7)

I went with the slp ls6 intake. Gained 12hp and 26 ftlbs. Not too bad for not having done anything to the motor. I posted a while back my results plus a dyno sheet.

jlrz28

iTrader: (7)

Here is the link

https://ls1tech.com/forums/dynamometer-results-comparisons/242154-before-after-ls6-intake.html

SS1875

iTrader: (34)

Go with the LS6 intake and ported TB unless your going to a bigger cube motor...then FAST it!!

redhotz28

iTrader: (3)

when youget rid of the egr stuff, does it through a code?

DanZ28

iTrader: (5)

Yes, it will throw a code and will need to be turned off with some editing. Should do tuning anyway with mods like header and intake swap.

I don't think you need big cubes or 600HP to use the FAST intake from what I read on this site from doing searches, you just need a max effort motor, even stock cubes see nice gains at the track over the LS6. I'm with the rest here though on using a LS6 intake for your mods...

Dan

SouthFL.02.SS

For what you want, the LS6 intake is plenty fine.
Though, the 90/90 will pick up good gains on a decent head/cam stock cubed setup. It did on my ol' setup.

DONAIMIAN

iTrader: (18)

I say youll need the FAST intake once you start spinning the motor over 6500(where the LS6 starts to fall off) not really max effort. Here in texas (where it seems that everyone is cammed and runs 11's) a lot of people are running the 90/90 on big cam and heads cam combos and have seen gains enough to justify the money.

1999 SS

iTrader: (3)

ive had an ls6 intake and ported TB for 3-4 years and also ported heads and cam recently purchased the 90/90 combo because its the next step up on the ladder. if i could have purchased the 90/90 combo back then i would have because i wouldnt have to do it now, and if you plan on keaping your car for a while(like i do) you have to remember the golden rule that "horsepower is addictive" and that you never have enough. so plan your purchases that way and in the long run you save.