MAXIMO

iTrader: (14)

this was the old set up. 346ci stock block

Ls6 intake
114 .600 lift cam 236
mid headers
freemods
shanner TB
LG air lid

Car made 403rwhp and 382rwtq

Added the
Fast 102mm
PTM Tb 102mm
85mm Maf
Fast toys Airlid
Ls2 fuel injectors
open cutouts

Made 402rwhp and 376rwtq but it was 103 outside while tunning Man i need some heads

kinglt-1

iTrader: (26)

unless you dyno'd in the same conditions, that info is useless... If your old numbers were in 60 degree air with low humidity, then you probably gained 10-15whp. Take it to the track and see if your trap speed picked up.

Engine_HP

iTrader: (1)

ive seen similar dissapointing results with the 102/102.

projectX

iTrader: (51)

Why the hell with those mods would you lose hp?? Thats alot of money to be thinking your gonna gain only to lose it - sucks.

JPH

iTrader: (2)

I haved gains with FAST 102s on 346s, but they are very minimal and only showed after 6k+. So I feel your frustration. The heat/humidty I am sure played a factor as well in netting no good results.

projectcam

iTrader: (12)

Thats a big intake for a stock cube motor, get long tubes and ditch those mids.. The Ls6 intake becomes a restriction at about 115~ whp. When you get good heads make sure they are matched for your cubes to get more out of the setup.

Johnnystock

iTrader: (6)

Heads will wake up for sure, but 103deg dyno never gives the record number you might want..

JasonShort

iTrader: (242)

This intake was not designed to work to it's potential in a stock headed application

You can't expect the FAST 102 to provide the gains that you would see when going from the stock LS1 intake to the LS6 intake (on a stock head motor). The LS6 intake is *nearly* optimal for a stock head motor, though you will see a few hp gain with a FAST 90/92. However, the stock heads/cubes are going to be the bottleneck at this level of engine, NOT the intake. The engine works as a system, not by the individual components.

Damian

iTrader: (89)

A FAST 102mm is a HUGE overkill for a 346ci motor. FAST 92/92 is the biggest thing a stock motor can really utilize and make it worth the money IMO.

Another internet myth that needs debunked. Bigger isn't always better.

69LT1Bird

iTrader: (1)

Talk about no intake air velocity.

hitamuthafcka

Well If u ask me I had one hell of a gain on the 102 intake just slapped the 227heads an 102 lsxr & tb on ls1 not stroked
Ms4
Pace headers an few add ons no spray stck suspension
Ran 11.6 on a .9 reaction no stall on a 100shot
Ran 12flat no stall on about 5000da Hobbs nm

JPH

iTrader: (2)

I agree with you 100% totally!

kinglt-1

iTrader: (26)

the op's car has STOCK heads! Wich is why everyone is saying that the 102 is overkill.

smok'nZ

iTrader: (160)

lt headers would help it breathe too

i never dyno'd mine but felt the difference 90/90 vs 102/102

The Alchemist

iTrader: (19)

You're obviously not intake restricted, so there were very little gains to be had by upgrading the intake. A better set of heads, and long tubes, and you'll take advantage of the better intake.

hitamuthafcka

Yeah I realize he has STOCK heads, but it seems that most people think its an overkill to the motor not just heads...thats what i was trying to point out, anyways like jasonshort said Heads is what will definetly wake it up as long as you have the right application, here is some of the mods I have
102 FAST airlid
100mm MAF
102 lsxr
102 tb
stg 2 loudmouth exhaust & ofcourse headers

maxspeed05V

iTrader: (4)

looks like LS6 intake is a good bang for the buck.

Thanks for posting your results, alot of guys are to embarrased to share them but your not the only one that hasnt seen huge gains from a 102 .

Im sure the humidity held you back a couple of Hp but I dout it could of been much.

Seems like Heads are a better bang for the buck and are worth the extra work.

taman86

iTrader: (19)

wow thats crazy, i just upgraded my stock ls6 to a 96mm aluminum intake with matched throttle body and 85mm maf to take advantage of the lift of my cam. my ls6 was restricting it. i know that once i upgrade my heads it will deffinately wake up both my intake and cam. but fwiw get a really good flowing exhuast, and a nice set of 1 3/4" lt's and you'll see 415 maybe 420 with a really good tune.

HellaciousA

I put down the numbers in my sig, and I have a small cam with cnc ported 243s. Im also SD Tuned as well.

BaddBird

iTrader: (6)

Who did your heads?