Tuning

[THT]

I've got some performance upgrades planned for my 4th gen...once they're done, I won't modify it any more other than aesthetics. As part of this upgrade, I'd be getting an EU. Should I also get a wideband O2 sensor or just turn the car over to a tuning shop to have them tune and set the EU parameters?

[Ovaltine Jenkins]

get the wideband and tune it yourself...

[THT]

get the wideband and tune it yourself...

Don't know how to tune. Besides, the cost of the tune would probably be less than the wideband, right? And if I'm done w/ perf. mods, there's no need for re-tuning. Or is there?

[Ovaltine Jenkins]

no, ur looking at 10+ pulls on the dyno, $200+.........

[THT]

no, ur looking at 10+ pulls on the dyno, $200+.........

Well I guess I could always street tune it and sell the O2 afterwards. Wanna help me when it's all done?

[nismo3112]

I would see what's involved with tuning it and if it's not too hard I would try it..

[Ovaltine Jenkins]

you get on the highway, run your 3rd til redline. Look at graphs, adjust timing...
lean it out or make it richer by adding/subtracting fuel...

[THT]

you get on the highway, run your 3rd til redline. Look at graphs, adjust timing...
lean it out or make it richer by adding/subtracting fuel...

What about timing?

[Ovaltine Jenkins]

I said adjust timing. Usually advance with the vq.

[Goldtooth]

hey man, im probably gunna do this with you. after i install the 00vi of course
how good of a tune can i do with a vafc-ii ?

[nismo3112]

hey man, im probably gunna do this with you. after i install the 00vi of course
how good of a tune can i do with a vafc-ii ?

Probably not too good unless you get a WB.

[Goldtooth]

how much does that run for?

[THT]

how much does that run for?

$300 or so.

[THT]

hey man, im probably gunna do this with you. after i install the 00vi of course
how good of a tune can i do with a vafc-ii ?

I won't be doing this until the spring...I need time to buy all the parts and prep...

[Goldtooth]

Probably not too good unless you get a WB.
Is the WB something totally different than the VAFC-II or it can do what the VAFC-II can plus more or what? cuz maybe I'll just invest in the best part from the start......

[Ovaltine Jenkins]

wideband is an o2 sensor, you need something to plug the WB into so you can get it's readings and adjust the parameters...

[Goldtooth]

interesting....

[DasTeknoViking]

Too bad there isn't a shop in this area that knows WTF they are doing as far as dynotuning goes for Nissans. Tune it yourself, wideband and a stretch of the road is all you really need. Wideband will pay for itself after the local shop blows your motor up while they try to monkey with it- trust me my friends have paid the consequences after getting PRO tuning done on their cars and blew up a buncha motors.

[Goldtooth]

so the shops don't pay for blowing peoples' motors??? ( I've never been to a dyno so I wouldn't know how it works.)

[DasTeknoViking]

Yeah if they blow up your motor they just say OOPPPS we are sorry, now clean this junk up and get it out of here. Like I said, I wouldn't let anyone touch my car. I have enough mechanical/electrical knowledge behind me to let me tune my own car with friggn resistors if I have to- yes its doable don't ask me how.

[Goldtooth]

very interesting....you're making me wanna get that WB setup even more.....

soooo, suppoese I get this: http://cgi.ebay.com/ebaymotors/PLX-Devices-M-300-Wide-Band-Oxygen-Sensor-Kit-M300-Tune_W0QQcmdZViewItemQQcategoryZ33557QQihZ008QQite mZ180015698360QQrdZ1QQsspagenameZWDVW

With that WB, and a VAFC-II I can adjust AFR? (The WB will display the afr, and can I tune it with the VAFC-II? or do I need something else besides the VAFC-II to adjust it?)

Can I tune and adjust afr and do all that bullshit without a laptop with the above stated setup? because I don't have a laptop.....

[Ovaltine Jenkins]

I don't know if you can hook the wb into the vafc, I doubt it...

[aznsap]

you'll have to torch an extra hole for the wideband to fit in your ypipe somewhere.

get a wideband O2, and some sort of display or a laptop program or something, and a used vafc2 you can get off ebay for less than $200

[DasTeknoViking]

I have mine in the "behind the main cat" location because my Cattman exhaust has a bung in there that I do not use. It doesn't give me any good readings thou, I am going to weld in a new bung in the manifold or just junk the OE sensor and use my wideband as the primary 02 and for tuning. PLX M300 allows you to do that, I have a M300 installed in my Max. I have a EU that I still havn't installed... been in my room since Xmas.

[THT]

I was looking at wideband O2 sensors and I may pick up the same M300 that you have, Mike. Plug that into a pair of HS headers and EU and run it as one of the primary O2 sensors as well.

[Brian]

supposedly a WB o2 won't last long on a street driven car.
Don't know if it's fact or not though, just something I read somewhere

[Goldtooth]

ok, speaking of tuning, THT or BlackBirdVQ, do you guys know how to fully operate and understand the VAFC2 or know a good shop with a dyno that does?

[walec05]

P&L motorsports is pretty good at tuning and dyno running.

AMS on oakton does alot of dyno tuning, not just on evos, but ive seen them do everything.

[DasTeknoViking]

Widebands are now used on ALOT of cars from the factory. VW has used it for the last few years, and so has Honda. Honda uses NTK sensors where VW uses cheaper to buy Bosch 5 wire units. I know that my PLX M300 uses the same sensor as a VW Golf 1.8T. Its like a 40 dollar sensor when needed to be repleaced. Don't mistake these sensors for cheap ass Nissan/Bosch 02 sensors that last few thousand miles. My AF has been the same for the last year + that I've had my M300 installed. I was told that response time will diminish when it gets too old, mine responds super quick so I have no doubt that it will last me another year or 2.

[TurTLe]

thoses front heated 5 wire o2 bosch units stink. always going out. r32's have a thing with bank 1 sensor 2. actually they have a problem with all 4 sensors going bad at the same time. i saw 3 R32's with those issues.

How will you use the 5 wire sensor in ours? Are they the same connectors?

[DasTeknoViking]

You can splice in the heater element into the wire harness, and send the ECU wideband signal for more accurate reading. The M300 unit has a output signal that is narrowband, its up to you which way you wanna do this.

Widebands are more problematic in the way that the ECU is WAY more sensitive. We repleace ALOT of wideband 02 sensors on the TLs and MDXs because they are "out of spec" for whatever reason. With todays SUPER cheaply made sensors, cars, well pretty much everything.... it doesn't supprise me that Bosch, NTK and all other brands suck. Atleast NGK still makes their plugs in Japan.

[TurTLe]

yea same thing with ours at VW " below theshold " or w/e it that word is. We basiclly do it mainly on the 1.8T's and the R32's engines. They only made 5000 of those suckers but i've put in about 10 front o2s in bank 1 sensor 2 already its just silly.

We also had people who tap into the harness to get a A/F reading for their gauges and every time someone does it. the light goes on instantly. Far too sensitive in my opinion but then again i dont have much knowledge in aftermarket tuning.

[Goldtooth]

I don't know if you can hook the wb into the vafc, I doubt it...
I should get a WB with datalogging then use the VAFC2 to tune at the needed rpms? no? why would I hook up the WB to the VAFC2 just wondering?

[Biggs]

with the EU you can hook up a wideband to it. The EU has an autotunning option but i don't know how well that works.