Finally got the WB hooked up and did some runs. Here is the first run. No corrections done:



10.1 AFR! I'm using SAFC-II but so far with -15% removed at all rpms has brought it closer to 12 AFR. Obviously I have a ways to go, but this is a good reason to consider some kind of fuel computer. I'm considering EU now as I would like to trim fuel under 40% throttle.

 

You think thats bad....after my 00vi swap, my ratios were all below 10, mostly 9's and 8's.


I'm in the same boat as you though about the EU, strongly considering it.

 

So are you gonna dyno it when you get to 12.5 ????? I ran my car almost all of last year at 10:1 w/spray..... Leaning it up a bit really helped on the last track day of the season. Plus I really need a wideband.

 

yup, 10s and 9s are not rare on a 3.5 swap with no tuning. I think i have -19% - -20% at 4500 IIRC. I use an SAFC-1 and it works just fine. Of course eventually I want to get an EU, but really as far as fuel control is concerned, SAFC is enough.

 

look in sig no fuel tune ,no timing tune and stock rev limit .

I have no clue what my air fuel ratio is ,my swap was done around 3 years ago. i think i smell fuel when i drive

 

your car is also on the same weight class as a Pinto , lol. Hey you're very aware that if it was actually tuned it would run even better than it is now. You have amazing #s with no tuning... imagine tuned :-D

 

Even on an A33B ECU AFR =

 

I have a feeling that the whole 51 PSI thing is unnecesary.

 

Well here is the latest:



Looks alot better than the original. I have a few areas to clean up but much better. I'm trying to stick around the 13.0-13.3 range. The transition from the low rpm to high rpm with the gutted IM is not as drastic as it was before the change. Downside is with the changes is a nasty torque steer. I need a AE tranny.

Harry, I still plan on going to the dyno when I get this sorted out. I'm thinking next month.

 

what r u using 4 ur extended rev limiter, if u have one?

 

I'm sure there isn't any relevance of this subject in this particular thread to your post.

 

Nope, rev limited here. How did you come to the idea that I did not have one?

 

Why tune under 40% throttle?

Do you hava data to prove you're rich at ≤ 40% TP as well? If so, you may have other issues (o2 sensors) since they (O2 sensors) should adjust and be very close to stoich during that condition ( ≤ 40% throttle)[/QUOTE]

 

I'm not tuning under 40%. It keeps stoich < 40% The last graph shows that it goes stoich after I let off the gas.

 

Ok, then why do you want to tune down there then?

 

yikes. I smell fuel alot when I get on it when I'm driving, but normal driving my working o2, help out there.

untune, yea.

 

Traction bars solve torque steer. Remember mine ??? A VLSD tranny is always good - you can get them out of 1995-2001 Infiniti, or AE 2001 Maxima, or 2002 V6 Altima. But the Jbars solve torque steer. More power causes that, you know.

Let me know about dyno plans. I'll take movies!

 

all 06 altima 5spd trannies come with a VLSD?

 

You can also do an overall correction with the SAFCx by using different IN and OUT numbers.

 

Is that idea similar to this?

 

Here's mine. I didn't need too much adjustment initially since TS did a pretty good job (12.8-13.1) so far.
I leaned it out a bit though.



Needs more smoothing though.

About (-)4-6% across the board w/ SAFCII


I have this extremely lean spot only in first gear from 3900 - 4100. So when I correct it, it does fine in 1st, but in 2nd and all other gears, it's rich in that corrected (+) area. So,

 

If you're asking me, I don't know that.

I only know that some 2002 V6 Altimas have "locking" differentials as shown in a Car-Part.com search for automatic transmissions - in V6 cars. I've didn't find any locking differentials in 2003-2008 Altimas.... but I didn't look very hard, since any 5-spd automatic won't fit in my '99 Max.

 

who makes traction bars for our cars?

 

Ideas can be found here, even though it's for an A32.


http://forums.maxima.org/showthread.php?t=417318
http://forums.maxima.org/showthread.php?t=412049

 

The same **** happens with me when I step on it from a dig. It does this funky SIN and than stablilizes. I tried fixing mine and it just takes small adjustments to minimize the lean condition.

Also, what's up with the lean A/F in the 7000 rpm range. That is a little dangerous don't you think. I'm not familiar with the 3.5 but can it handle those lean conditions like that with no detonation?

 

Yeah, but since I'm auto, I spend most of my time in 2nd, so I don't see that 1st gear lean too often. My guess sis things might be happening too quickly for the ECU to compensate, then it eventually catches up @ 4100.

Technically, the heads have better cooling jackets when comparing to the 3.0L, so coupled with the right fuel, yes. My timing logs show things going well, (no reing of timing in higher RPM) But my ECT has risen a touch during normal driving.

But, on that subject, there are people on here tossing timing into the high 30's to around 40 w/o detonation using the VQ30, so I know mine would always ping when i had my JWT and the weather was warm (mid 70's or greater)

 

2002 Altima uses a cable operated transmission that is similar to that of the 2002+ Maxima 6spd. Its not the same tranny.

90-95 Nissan Stanza/Altima has a VLSD tranny that is similar to the 5spd Maxima tranny. It won't bolt up.

Car-part.com is wrong.

 

IIRC car-part.com lists a locking diff option when searching for every tranny, so they are wrong a lot

 

I was talking about just AUTOMATICS for those years - car-part.com does list the correct VLSD part number for "locking differential" in the varoius years.

About the 2002 V6 Altima - the FSM shows two different automatics for that year - one is a 4-spd automatic that sometimes shows as "locking". The FSM seems to show an identical tranny to 4th-gen automatics.

So you can find 95-99 Infiniti automatic VLSDs, 2001 AE automatic VLSDs and 2002 V6 Altima automatic VLSDs listed on car-part.com that may slide in the 4th-gens. Verify the tranny part number.