MM98

iTrader: (13)

I am.. I agree with the what 427LS7HCI said about trying a 92mm tb & I said the same in your dyno thread.. The fact that you're loosing power below & gaining at peak sounds like poor intake velocity with the big 102 tb. Worth a shot if you know somebody who has one they'd let you try.

raysadude

iTrader: (11)

I'll try to find one, heck I might just sell my 102 for fast 92

raysadude

iTrader: (11)

here's the pic of the MAF that's in the car, seems to me it's the 90mm one




here's the pic of lid




and here's beneath my air filter

jlcustomz

The new design of the 102's is a removable runner, removable top , right? Any chance you have an internal leak? Also leftover casting flashing & shrink variations could be worse in one intake than most.
Just trying to think inside the box here.

raysadude

iTrader: (11)

what would an internal like sound like? any idea of how to identify this? i'm thinking about doing smoke test on my car, do you guys think it'll be useful?


there's one runner that makes a "wooss" sound but i'm thinking it's just more air compared to the ls6 intake

DrkPhx

iTrader: (15)

Do you have a data log from the dyno run from a WOT run of the LS6 intake? You need to compare the MAP kPa reading between the (and using key on values) two which gives a good indication of incoming airflow. It should be higher at WOT for the FAST intake. I would also ditch the GMS MAF and go with a new GM 85mm MAF.

BrntWS6

iTrader: (7)

From dyno thread.....you need to get ahold of a GM 90mm MAF. 100mm is just a waste on your car and there harder to tune.

raysadude

iTrader: (11)

will i need a re tune if i put GM 85mm MAF? and why would you guys think the new GM 85mm will help me?

soundengineer

iTrader: (16)

100 mm MAF is not a waste...
but you do need to have the proper length of tubing in front of it to allow it to work correctly...need some way to smooth out the airflow.

BrntWS6

iTrader: (7)

I disagree on his setup. It's good for big cubes but 95% of guys don't need 100+ mm TB's and MAF.

soundengineer

iTrader: (16)

you have it slightly incorrect there...
its not that he doesnt need it.... its always good to get more air into the engine any way you can..
the problem is that he is not set up to use it effectively..

I agree.. His setup cannot use a 100+mm MAF properly...

big or small cubes doesnt make a difference...my 346 showed power gain going from a 90mm MAF to a 100mm MAF, but I also had the proper amount of tuing in front of the MAF and got the airflow smoothed out before it went thru the MAF.

raysadude

iTrader: (11)

sound:like i said i'm planning to put the saxon airflow straightener to help smoothen up the air flow. what do you mean that my setup can't use 100mm MAF properly and you can?

soundengineer

iTrader: (16)

you need more pipe.....
not just the straightener
2ft+ in front of the MAF

I no longer use a MAF....not really possible with my setup....
My intake line is too short and larger than a 104mm...

BrntWS6

iTrader: (7)

Glad we agree.

raysadude

iTrader: (11)

I see what you guys are saying. I have the MAF coming in anyway and I'll sell it to get 92mm TB and 85mm MAF hope that will help me gain my mid range power back.

Thank you for the inputs.

raysadude

iTrader: (11)

One more thing, will I need a re tune if I put the new 85mm MAF on?

ULTIMATEORANGESS

iTrader: (4)

that an impressive looking setup. it must be a monster.

BrntWS6

iTrader: (7)

Yeah, I'd say you will need it touched up a bit.

Pumba

It's probably too late for this, but if you can sell the F.A.S.T. intake manifold do so.

Then contact TPiS and send them your LS6 intake manifold. TPiS will convert the snout of it to accept the 90mm GM throttle body. Your cost will be approximately $400. The result will be more power than a F.A.S.T. 90 mm, better low and mid-range torque, and you will save money.


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thunderstruck507

iTrader: (18)

Not the results I have seen from testing. Have any links to some good info?