LS1T56FTW

iTrader: (3)

Give me some of your opinions on this setup.

Overall the mods on the car would be in addition to the mods in my sig:

PRC 2.5 heads
TSP Torquer V2 Cam (112 LSA)
LS6 intake+Ported TB

Either that, or I would run possibly a FAST 90/90.

I would like to have a nice torquey powerband to roughly 6500 RPMs.

*02WS6TURK*

iTrader: (13)

What kind of information are you looking/seeking for about the two intakes? You would see better gains with a Fast 90. With a H/C set up you could see anywhere from 15-20 HP gains over the LS6. It comes down to weather you want to spend $500-800 on a used Fast 90 or a few hundred on a used LS6 which you can find at a good price used all the time. I am selling mine w/ a ported TB being I just bought a Fast 90/90.

Gonoma

iTrader: (15)

you'll lose low end power (torque) if you go with the FAST but gain power up top (hp) IMO i would just go with the ls6 intake and save the $$$ you'd waste on an overpriced intake and upgrade your suspension to help compliment your engine upgrades and help get the power to the ground better

*02WS6TURK*

iTrader: (13)

I have never heard anyone mention or say anything about losing low end power with a Fast 90. If anything I have heard gains with it. Fast themselves said over a phone conversation that it was designed specifically not to lose power down low.

09camaro383

iTrader: (2)

I disagree with Gonoma with the 90/90 set up you will see better performance throughout the table i see his point that you will lose low end power but i see that happening with the 102mm intake why do you think *02WS6TURK* got a 90/90 because is better and it will provide all the air he needs in my opinion an ls6 intake is a good stock up grade like little things air lid and free mods but when you swap headers, heads & cam you need something that will flow more

*02WS6TURK*

iTrader: (13)

I can see where one might lose out on some power down low with swapping a 90 or 102 on with the stock cam/heads. If this was the case though on a mild bolt on cam only car or a H/C combo, you wouldn't see so many guys running the 90,92 or 102.

Gonoma

iTrader: (15)

I was comparing the the graphs in this link the top one is hard to see so i may have been off but the ls6 curve seems to be a bit smoother. If there are gains with the fast at low rpms they are minimal the fast only made 4.3 MAX over the ls6 but as you can tell with the choppier curve its possible to do. The Hp on the other hand you can tell a difference there. All im trying to say is there are other upgrades that can be done to help make it a quicker car before the 5500rpm mark

http://www.ls1.com/forums/showthread.php?t=78456

Gonoma

iTrader: (15)

I could be wrong this was simply just my opinion. i just thought this was a good example since it was on the same dyno on the same day where they only changed the intake. Obviously things can be changed in the cam to help or hinder the two intakes. Its all in what you're looking to achieve in the end i guess

09camaro383

iTrader: (2)

Gonoma I respect your opinion and at the end LS1T56FTW will get what he wants and probably even get something else but looking at the graph it did show a gain of 30rwhp/10rwtq by going to a FAST 90 over an LS6

LS1T56FTW

iTrader: (3)

There are two locals with FAST 90/90 intake on their cars, and they say the LS6 is definitely a lot more streetable, which IMO means a FAST intake loses low end.

Also, I do not want to rev this car much above 6500, so I don't want to go with a FAST if it means I will have a powerband that is shifted up- in other words instead of 2500-6500, have it be more like 3000-7000 kinda deal. You see where I am going with this?

Basically what I wanted to know is if keeping the motor a fairly low revving setup, will an LS6 be sufficient, or would a FAST really make THAT much of a difference.

Phil'sC5vette

iTrader: (4)

Do the FAST 90/90 the firs time or you'll find one on sale next and change manifold all over again. Why pick up 8 HP when you can pick up 20 HP

09camaro383

iTrader: (2)

my question is LS1T56FTW why do you want to install an intake that will not flow the air that the PRC 2.5 heads needs!! I will like the get all my power out of a $1,309 investment!!

LS1T56FTW

iTrader: (3)

I guess that is true.

Gonoma

iTrader: (15)

thank you, but as i was saying that net of 30rwhp/10rwtq was on a different dyno and the graph is different so the numbers can get skewed a little. See what im saying?

A FAST 90/90 setup is what $1000-1200 new? I know you can get them a little cheaper used but still. Even if the gains were in fact 30rwhp/10rwtq you could get a pretty safe nitrous system (150shot) put together where you don't have to worry about blowing the motor up. The gains could really be noticed through out the range instead of just up top.

NemeSS

iTrader: (127)

just get the one you can afford. the 90/90 will lawys have good resale value if your not content with its performance.
ive made 490+rw n/a thru a ls6 intake. im sure a fast would have put way over 500rw.

LS1T56FTW

iTrader: (3)

After reading that link on the LS6 vs. FAST, I would definitely like another 30whp, but someone said don't use nitrous with a FAST intake? What is that about? I definitely wanted to put a 100 shot on the car, after that was finished.

Gonoma

iTrader: (15)

nitrous has more pure oxygen than atmospheric air does so no need for the extra cfm lol

09camaro383

iTrader: (2)

Just to let you on a little secret "wink-wink" dont tell anyone I got a ported Fast 90 intake with a direct port nitrous kit already intalled for ta ta ra ra $980, so you can get a good deal as well, just be patient.

LS1T56FTW

iTrader: (3)

So...

01SS99red

iTrader: (6)

I can tell you from experience with my setup you will lose low end tq. I lost 5 rwtq going from my p&p tb/ls6 combo to a ported fast 90/90 but gained 12 hp and increased the powerband.