Stock MAF Housing VS Big Bore MAF Housing (76.2mm ~ 3") Technical Discussion
Originally Posted by NmexMAX
Little tweaks @ what? You can do everything SR mentioned in an hour, AND get at least 4 runs in (part of #2 on his list).
That's a commonly misconceived view around here.
People get dyno time and do not take full advantage of the time they have. There is an entire thread on this in the dyno forum. I'd suggest reading it thoroughly before going to dyno.
To answer your question, if he rented the dyno for some 'tuning' time, then an hour is a very common timeframe, and as SR stated, if he cannot get those items done, he is not doing it right. All my sessions were an hour, and so were probably many other people on here. That is more than enough time to get a decent AFR.
This eliminates the concept that 'he may not have as much time as me'.
People get dyno time and do not take full advantage of the time they have. There is an entire thread on this in the dyno forum. I'd suggest reading it thoroughly before going to dyno.
To answer your question, if he rented the dyno for some 'tuning' time, then an hour is a very common timeframe, and as SR stated, if he cannot get those items done, he is not doing it right. All my sessions were an hour, and so were probably many other people on here. That is more than enough time to get a decent AFR.
This eliminates the concept that 'he may not have as much time as me'.
Senior Member
Joined: Dec 2004
Posts: 132
You have to get a dyno after a couple hundred miles of driving.
O2 readings aren't used at WOT, but what does the car do then for AFR at WOT? Just dump in a fixed amount of fuel?
I have a feeling the computer will relearn and richen up the mix again via O2 readings.
O2 readings aren't used at WOT, but what does the car do then for AFR at WOT? Just dump in a fixed amount of fuel?
I have a feeling the computer will relearn and richen up the mix again via O2 readings.
Originally Posted by AuAltima3.5
You have to get a dyno after a couple hundred miles of driving.
Originally Posted by AuAltima3.5
O2 readings aren't used at WOT, but what does the car do then for AFR at WOT? Just dump in a fixed amount of fuel?
Originally Posted by AuAltima3.5
I have a feeling the computer will relearn and richen up the mix again via O2 readings.
So if getting EU isn't an option, what are the results of using a VAFC with a JWT ECU? I seem to remember reading a long time ago that the two didn't play nice together. Or is it possible that JWT could reflash the ECU to compensate for the BB MAF?
Why isn't an EU an option? Pretty sure it has a MAF scaling option, and if not, there are plenty of members with BBMAF + EU with success.
JWT would charge you your first born and your brand new puppy, and I don't even think they've done it before for our cars.
VAFC works fine with JWT. It's just it(VAFCII) needs to be manually set-up(tune by trial & error using WB) vs, PnP with the SAFCII (MAF scaling option).
JWT would charge you your first born and your brand new puppy, and I don't even think they've done it before for our cars.
VAFC works fine with JWT. It's just it(VAFCII) needs to be manually set-up(tune by trial & error using WB) vs, PnP with the SAFCII (MAF scaling option).
Why isn't an EU an option? Pretty sure it has a MAF scaling option, and if not, there are plenty of members with BBMAF + EU with success.
JWT would charge you your first born and your brand new puppy, and I don't even think they've done it before for our cars.
VAFC works fine with JWT. It's just it(VAFCII) needs to be manually set-up(tune by trial & error using WB) vs, PnP with the SAFCII (MAF scaling option).
JWT would charge you your first born and your brand new puppy, and I don't even think they've done it before for our cars.
VAFC works fine with JWT. It's just it(VAFCII) needs to be manually set-up(tune by trial & error using WB) vs, PnP with the SAFCII (MAF scaling option).
So you're saying the SAFC is the better option for tuning with a BB MAF and will work in conjunction with the JWT ECU? Interesting....
Member
Joined: Jan 2010
Posts: 119
VAFC has maf scale too ,i'm using it on my car....i have a VQ30 with a Q45 maf and i have it 1 IN and 4 OUT ijust needed to add a little more fuel(+4%) on most RPMs and a little more up top.... response is incredible with the BBMAF
P.S.i dont have JWT ECU,i have a 4th gen ECU with DE-K injectors, Z33 IM (all 3 pieces),BLOX 1/2 spacer and PFTB
P.S.i dont have JWT ECU,i have a 4th gen ECU with DE-K injectors, Z33 IM (all 3 pieces),BLOX 1/2 spacer and PFTB
Newbie - Just Registered
Joined: May 2019
Posts: 2
Maf trouble
SR what is your take on running w/o the MAF screen on a bigger MAF? Is it really unnecessary? I have done some searching and found nothing real concrete. Judging by this thread it seems to be ok, would running w/o a screen put more pressure on the sensor reducing it's life or its effectiveness?
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