Credit eng92:


VTC=(basically) cam timing control, which allows the cam advance/retard to be optimized. they are considerably more aggresive on z33 ECU's than a33b ecu's in the midrange, which IMO allows them to get similar airflows in the midrange with a less effective midrange manifold

 

Gona order it on thursday, should I reset all the safc setting back to default after installing this ?


(just dont wanna run to lean before and when I retune.... )

 

If you change the IN/OUT settings to 1/17, then your AFR should be the same all across the board, so you shouldn't have to reset any corrections.

 

been pondering a new Maf steup.....

 

Larger MAF's have been done on A32's equipped with a VQ35. Kevlo is going to toss one on his 2988cc A32, and it also seems like 96blkonblkse is pondering that thought as well.

 

to clear it up in my mind, what is the true benefit of a 3" maf (be it Land Rover or Custom?)

I certainly could use the leaner result of the 3" maf on my car right about now.

 

The gains aren't definitive at this time. Ther are mixed reviews regarding both A33 MAF's available (Elons, 76.2mm and the LRMAF, 82mm).

There is or will be a lot of debate regarding this mod. One person gained as a result of the 76.2mm, another didn't gain anything whatsoever aside from the feeling of better throttle response etc(82mm). Another member tried the 82mm but it was on a different engine, so the dyno was inconclusive.

Now, the general consensus now seems to be that the 82mm is too big to gain anything. BUT, it's not definitive if Elons gain was with respect to AFR, Airflow, or of course the combination of the 2.

The other fella that compared the 2 back to back (82mm vs OEM, 70mm) showed no gains, but it could have been because he was already AFR tuned, therefore resulting in lesser gained (nil).

I stand by this mod for it's increased throttle response and part throttle 'gains'. I never dyno'd back to back, maybe I will, maybe I wont, but it's staying on the car.

 

Ok...but I thought that Sooner said the Cipher can raise your rev limiter???

edit: sorry forgot to read through...answered my own question...

 

very interesting, seems when you made your setup, cost was very minimal, and if there is a gain to be had from it... I think i'll give it a shot. Even if the gain is better throttle response.

going to start a parts list and see if I can get pre-post dynos and see what/if I gain.

 

I bought the piece with couplers from a member on here. It was a good deal considering it had all hardware needed for install. After letting it sit for a while, I finally got my WB installed, and decide to try to get it in there. Did that, and shortly after was freaking out as to how lean it was. Waited another day, and started talking to another member on here who told me to try the different IN/OUT settings, in which case, after he gave me the correct readings, I did not need to change any fuel corrections whatsoever.

LRMAF/SAFCII/WBo2 = Priceless when playing with these cars.

 

I plan to start my much needed tuning session. So far the VAFCII is in place, with a test pipe waiting for a WBo2. Im impressed by the innovatice LC-1 so that will be my next purchase.

What was a tell sign that you needed to make adjustments with the IN and OUT settings on the SAFC? curious if such a change will be needed on the VAFCII.

SO basically on an untuned car a larger 3" or LRMAF will lean you out accross the board ( I could use greatly) and better throttle response. I guess aside from that our MAFs are that restrictive.

Dont know if this is a new question being introduced but in a forced induction situation, would this Maf (land rover or custom) exceed the specs of an OEM (A32 or A33) Maf?

 

I'm guessing you're going to get the RPM converter software upgrade option. I personally would recommend the PLXR300. You need to donate already .

http://forums.maxima.org/showthread.php?t=498048
http://forums.maxima.org/showthread.php?t=517758

The VAFC at this point, is said not to support the IN/OUT's for our cars. So, you will need to tune and monitor AFR.
Generally, that's what I think it will do. That's what it did for me.

Well, that's the kicker. The 5th gen sensor is completely removable from the housing. So, you're still using your stock unit(V specs etc), just that it is sitting in a different housing.

In the case of the A32, the housing/sensor is all one unit, meaning the sensor is not removable, so, you need to mod the stock housing or toss it (sensor) in a PVC tube. Either way, you're using the same sensor, whether it be A32 or A33. Check the AM forum as there are at least a couple of guys that have done it to the A32 MAF sensor.

 

I do need to donate my paypal has been locked up for the longest. The LC-1 will work well for me, I will like the guage as well as the additional analog output. I will have a very nice method of logging the RPM vs A/F.... i'm still working on it
I'll search around and see how the A32 Maf has been taken Apart. This clear things up a bit for me. I thought a new MAF like sensor was being used in replacement of the stock MAF, when in actuality its the same sensor just in a new housing. I see to the same rules will still apply.

I dont plan actually to be on the VAFCII for long, I have still yet to tune, so I will use the VAFCII to get my feet wet, but I've already been working on a new device for management that I'm eager to work with...

 

The cool thing with the PLXR300 is that you can have 5 different inputs. And log them, very simply, against each other very accurately. (RPM/AFR/MPH/TPS/ECT/MAF)

915max, 95BLK, 96sleeper, JSutter have all done it to the A32 MAF, so keep an eye for threads/posts by them in the AM forum.

Even better.

 

if you have an adjustable FPR you could up the pressure to about as high as you want to go, then just take out fuel as necessary. i figure you have an adjustable fpr and walbro (or equivalent) since youre 3.5 swapped. this would be one of SR20's many timing/fuel (hacks if you will). im sure you already know about this though

 

Reading all this is making me learn some more about our cars. Why would the car lean out with a bigger maf? Higher flow rate?

And whats the wbo2 in there for? And does everyone with the safc II have it.

 

the reason for it to go lean is that with a larger housing flowing the same amount of air, the air flowing through the tube is less dense which in return cools the hot element of the MAF sensor less, making it think there is less air entering the engine. less air requires less fuel. so for a given amount of air, it will inject less fuel.

 

I have thought about that, I would need a Walbro as the stock fuel pump cant raise the FP high enough, but I have a nice way to directly affect timing... all in due time...

 

o, yeah i was assuming you had a walbro, but since you dont then its not the same. i like the sound of directly affecting the timing though

 

To clarify, and think out loud, bigger is better because it flows more air, but bad because it doesn't cool the maf as much as the stock one, and thats where the safc comes in to tell the ecu that just because your under reading the air volume, there is still the same amount of air as before (or more ofcourse).

How does this cause more power? More air in and the more air out = more power.

And again, where does the wide band o2 fit in to the equation?

Just to note, i'm happy they came out withthe safc neo, this way the safc II price drops.

 

all this info is in the all motor forum

 

Where? I have been reading all the stickies there and haven't come across much regarding tuning and stuff.

Which sticky has info?

Thanks for the help, and sorry I wasoff topic.

 

Just found that sticky. I was looking at other stickies and didn't get to that one yet, but I will skip to reading about the tuning now that I am more involved.

 

bro from what every body just posted in this thread, just shows all i Do need is a SAFC which i have, and I dont need that 400$ check engine light computer

 

So i was right =) score.