BADZ

iTrader: (5)

You guy's use the stock mass or the 85mm mass sensor...If you have a pic, please show the set up..

Thx...

Another_User

I was wondering when somebody would ask that. I never could understand why FAST made a 90mm throttle body when there was no MAF in existence that could feed it.

Beast96Z

iTrader: (21)

Actually, Pro-M makes one for our cars that is 90mm, but it is over $400, so you don't hear much about it. There really pretty cool because they actually take into acount what you have done to your car so they are better suited for tuning.

SpeedDemon

THey actually give you a printout of the MAF transfer function as well. Very nice to have...

BADZ

iTrader: (5)

85mm was what most 90mm FAST guy's are using so looks like that's the ticket...I know that the 78mm mass would be the bottle neck for cfm.

CHRISPY

You could tune the MAF out of the equation and use a solid 4 inch tube in its place.

Ragtop 99

iTrader: (7)

I'm putting that combo on. I have the SLP 85mm MAF. I would also look into TSP's 85mm lid but last time I checked they were out of stock.

JF WS6

Who is or can do speed density tuning in the states? That would be awesome to just ditch the MAF.

SpeedDemon

Speed Density is actually a better way to tune (arguably) than MAF tuning. The problem is, SD is more difficult and does not have the ability to adjust for minor mods like MAF's do. Response time should be a little faster as well.

Another_User

3.5 inch works fine for anybody running a TB smaller than 90mm. The one I use is .125" thick and has an 83ish mm ID. Oh...and if the tube is solid air doesn't flow through it. J/K.

I ditched my MAF. All too easy.

More power, better driveability, oh disadvantages...maybe less gas mileage with a heavy foot like I have. The MAF is not more precise. It does adjust faster to barometric changes and temperature changes from what I understand.

SD will adjust for mods through the fuel trims. I am not sweating it because mods just require touch-ups to the VE table to keep them from swinging too far.

The only thing I can say is...PITA.

CHRISPY

LOL!

I meant solid as in "not rubber" so that it wont collapse under vac

BADZ

iTrader: (5)

85mm will hold over 600hp's N/A so it will be fine. What would you do on a 105mm TB?

Another_User

True. Don't forget the giant oval throttle body and intake they have now too.

Hmmm...this will be post 1000 for me...I wonder if that thing under my username will change...

LOnSLO

iTrader: (15)

Well, you could always ditch the MAF altogether. That's what I ended up doing.

BADZ

iTrader: (5)

What did you have to do to make it work (rid of the maf) LOnSLO? Megga tuning or what?

LOnSLO

iTrader: (15)

Well, still in the process. It hauls *** at WOT, and idles good, but driving down the return road is like a rodeo. Part throttle sucks right now, but plan on fixing that by this weekend. I'd do it again.

BADZ

iTrader: (5)

I would not want the headache of have to re-tune it all the time w/o the maf, I think I will just run it for now and later figure out something else...

HumpinSS

iTrader: (1)

Another person who has succesfully gotten rid of their MAF


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Another_User

There is no re-tune all the time. The trims update as normal. I finished my VE table, it runs perfect. I fixed my part throttle cruise bucking, now I need to eliminate closed throttle deceleration surging (minor), and bucking part throttle coming off the line slowly (like in traffic). The cruise bucking was all throttle cracker once I pulled that MAF out (+ .9 to the entire table). I suspect my bucking off the line to be the same.

Another_User

Aha...my IAC counts are too low after the car warms up. With the temperature change the more dense air must be too much. Back to the set screw! (Glad I didn't drill.) That should cure my surging problems at low rpms with no throttle (before throttle cracker can kick-in...I wondered why it was a suddenly appearing problem). Sorry for the thread hi-jack, but I thought it was interesting info to share!