MY99TAWS6

iTrader: (3)

I threw on my fast 90 /NW 90 and have b1 cam currently. 221/221/558/558/114lsa. I have no headers sold them to buddy since turbos won't need them. Also have turbo gt7 cam and will be getting some new heads. And later new engine. I sold my ls6 intake and ported tb and bought the fast and now will use it. I know its not the best choice for big turbo guys past 20psi. But I am staying under that level.

So was bored and threw on the fast 90/90. Now car seems to run not bad and even checked for vacuum leaks. I have it tuned pretty good. But it just don't seem to have any bottom end. It seems weak down there. It seems to be ok thru the midrange think maybe 4000 up and pulls strong to currently 6800 redline. So did I just mess my power band up with the large fast stuff. I thought big throttle bodies and intakes didn't mess up fi cars like the old too big carbs did. Or am I wrong. Couple local guys saying it did mess me up.

I would hope heads and fi will help since they will force more air thru their faster. Guess find out eventually but right now just finding my car pretty boring, Won't even spin them . I have 3.42 and nittos and its hot out so the nittos stick well. Maybe should air them up or something. A bit of spin would help me with new clutch.

ringram

How did you check timing and AFR, wideband? Dyno?
You might find timing needs checking etc.

MY99TAWS6

iTrader: (3)

I have hptuners and scanmaster and hp tuners has scanner.
I have wideband not installed yet but shortly. For now just leaned it out and watched for knock. Got a little bit then richened it back up some.

Dyno is a few hundred miles away and don't think want to bother with it till get my turbo kit installed.

DONAIMIAN

iTrader: (18)

I dont think its a real bennifit to having that intake with small cam only setups, but thats just my personal opinion with no data to back it up. Its just that everyone that runs it has a cam well into the 230's, or heads to go along with it.

Jefro6996

iTrader: (21)

I did a fast 90/90 swap and also swappedmy231/237 cam for an ms4 on 110lsa and gained everywhere on the power band. I thought my bottom end would suffer a little bit but i got really good gains. Heres a link to some graphs with the before and after graphs.

http://good-times.webshots.com/album/559097607cmUpKJ

MY99TAWS6

iTrader: (3)

Wow good gains there! I bought the fast 90/90 to run on 408 or 427. Its just on there for fun. Will I may run a 346 with my turbo cam and some heads for a year or so still again it will be just short term.
Today I took it out and really hammered it up to redline in the first three gears and it does pull fine higher up. Its hard to say if its weak down low or if my nittos just being so sticky makes if feel that way.

Jefro6996

iTrader: (21)

Hope you get everything figured out and i bet those nittos wont feel very sticky when the turbo goes on!