Tim Benton

iTrader: (1)

I haven't gotten a response in the 3rd gen or performance section so I'll post it here and hope someone has some opinions.

Are these sensors any better than a stock O2 sensor that has been linearized into the wide number range? I was thinking about getting one to help tune my PFC, but didn't know if it was any more reliable as far as data gained from it than my stock O2 sensor readings.

If true wideband can let you safely tune your car to a reasonable safety level and accuracy of say 95% and the stock O2 sensor is at the other end and you can only tune with it to a level of safety and accuracy of say 60%, where does the Greddy O2 sensor land inbetween those 2 ranges?
I want to be able to tune with the Greddy unit only if its more accurate thant he stock sensor, but not TRY to tune with it like it was a true wideband.
Tim Benton

SPOautos

How much does the Greddy cost? I doubt its anything special. I went to thier web site and couldnt find any info on it.

Try doing what Chuck did, go in with a group of people and pitch in $200-$300 each for a wideband. Thats what I want to do.

If I were going to spend any $$$ on a sensor right now it would be a EGT sensor/gauge.

I dont trust a o2 sensor as far as I can spit.

Have you already bought a datalogit? If not I'd spend the money on it rather than a high dollor o2 sensor.

Later,
STEPHEN

Tim Benton

iTrader: (1)

Stephen,

I plan on getting the datalogit in the near future, but without a wideband to hook up to it, its not worth anything tuning wise since your still using the stock O2 sensor, which has a wide margin or error, even when your trying for a ballpark figure like I do (.86 people. It would help input maps, fans, turbo transition, and whatever else it can do, but unless I get a group to go in and share one, the datalogit is just another thing to showoff and not really use it for what it was made for...tuning.

I've already ordered the Greddy unit, before I saw Wade's post in the performance section. I'm going to now compare the greddy, to the wideband at the dyno, and the stock O2 sensor and see wha data turns up. Comparing the wideband and the greddy will be neat to see if the greddy is decent, and then those 2 compared to the stock O2 sensor and see what stock sensor reading of .86 is on a wideband and what stock sensor reading corresponds to a 11.8 to 1 on the wideband, and then to the Greddy. I might need to get the video camera out to keep an eye on everything.

Tim Benton

Tim Benton

iTrader: (1)

major run on sentence I had to catch my breath after reading it.

Tim Benton

skotx

Hey Tim, did you just buy a replacement sensor from Greddy or did you get their A/F gauge w/heated sensor? I've always been curious about that unit. I'm looking forward to your testing results.

Jonesboro

You might want to consider the DIY wideband kit:

http://www.techedge.com.au/vehicle/wbo2/default.htm

Approximately $80 for the kit plus $120 for the O2 sensor.

I'm in the assembly stage of my kit right now.

SPOautos

I THINK you'd be able to datalog the o2 sensor by rpm via the datalogit. The other thing it will do for tuneability is let you access the hidden tuning maps and features instead of just using correction maps. I bought it for the datalog feature. Its just too hard to tune without some form of dataloging. I want to make some runs then load it on the computer and see what everything was doing for each rpm range and make changes accodingly

How much is the Greddy sensor? Have you compared the stock o2 sensor with the dyno yet? If so what was the outcome of that?

Later,
STEPHEN

mmaragos

The GReddy unit is about $300. I think that it is a reasonably good unit (4 wire O2 sensor). I doubt that it is as good as a true wide band.

Has anyone tried the FJO?

http://www.alamomotorsports.com/prod...eband.html</a>

The basic controller and O2 sensor is $750 and the Datalogit takes in a 0-5V signal (which is what you can get from the controller on the FJO).

This is what I am doing. I have FJO, but I am waiting to receive my Datalogit.

Tim Benton

iTrader: (1)

hey Stephen, that true about seeing the hidden fuel maps, then true map comparisons can be posted and scrutinized.
I wonder if the Greddy unit can be used with the datalogit? I'll be getting it thurday, from the data RP sent using UPS. Ordered it monday so thats pretty quick turn around. It is the 4 wire unit/gauge pictured above. black face though
Tim Benton

mmaragos

Not too sure if you can get a 0-5V signal off the GReddy unit. That is essentially what you will need to interface (datalog) with Datalogit. The GReddy unit comes with a little box that fits inbetween the gauge and the sensor. I guess this is the controller. This may be outputting a 0-5V to the gauge. If it is, you may be able take the 0-5V signal then wire that to the Datalogit box. Presto magico.

skotx

The only difficulty here would be the min and max values. It's my understanding that the Datalogit requires those, right? So it could figure out that 2.5V = 11:1 or whatever. I suppose you could always guess from the min and max values printed on the gauge face.

forcefed1

Now your talking.
this looks like the perfect kit for a person with electronics background and more time then money (ME).
I take it you got the parts for it?
Are you on the mailing list?
Did you get yours made? I was wondering if you'll be able to mount it in your tailpipe. Looking at it it should be accurate mounted there as long as you can push it up in a bit.
hell for 200$ I would just get one for both cars and mount a bung.

It looks lke you can't datalog with it the way it comes am I wrong?
keep me posted on teh progress of this project

Jonesboro

I received my kit within 2 weeks of ordering it. I'm in the process of assemblying it with the help of my brother who has experience assemblying PCBs.

I haven't purchased the O2 sensor yet and don't intend to until I've completed the assembly. My plan is to mount it in the tailpipe on a temporary basis while tuning, but I'm not at that stage yet.

The PCB has provisions for a serial port to connect to a PC. I've ordered the Datalogit which will work in conjunction with the DIY wideband for datalogging. I'm on the TechEdge email list but haven't received anything and don't really expect to. All the necesary info is available on their web site.

FYI, there is another current thread on the Forum discussing the DIY wideband:

https://www.rx7club.com/forum/showth...threadid=47104

forcefed1

thanks didn't have any idea about the other thread