I was thinking about installing a wideband o2 for jetting on my 2006 ds. does any one know what the stock wot fuel ration is 12-13? And what the bike idles at so i can get prefect mix. ive try searching but it seem must ppl take it to dyno. Since ive tune my person 800whp supra with wide band i figure i could do the same with the ds. Any help with the right fuel ratio for the bike would be perfect thanks again guys on my first post.

 

The DS is a 4 stroke engine just like your Supra, only it is not turbocharged.
Here is a snipet that I found for ya.
"The Wide Band Commander gives you everything you need to accurately monitor your air/fuel ratio. In most cases the target a/f ratio for naturally aspirated engines will be between 12.8:1 and 13.2:1 whereas supercharged, turbocharged, and nitrous-injected engines will like a richer mixture between 11.5:1 and 12.5:1.

 

Do you have any idea what the ds idles at? 15-16 range. thanks sport400.

 

As I have never tested it, I do not know specifically. The stock DS carb has the equivalent of an accelerator pump, so I believe the ratio should be in that range of mid 14's to mid 15's

Search for OMR carb mods and read through - That should give you a good idea in terms of baseline settings

 

I wish OMR would check in..

 

Link To OMR carb mods.

 

thanks xfreebirdx

 

I use the Innovate Motorsports LM1 wideband to log and tune my DS. I have the O2 sensor located pretty much behind the stock heat shield, and only have it on there for tuning. I tune mine to run at 12.5-13, and it screams. When I had it on the dyno, right around 13 made the most power. Mine idles right at 13.

Chris

 

<div class="FTQUOTE"><begin quote>Originally posted by: DubaiPolaris

I use the Innovate Motorsports LM1 wideband to log and tune my DS. I have the O2 sensor located pretty much behind the stock heat shield, and only have it on there for tuning. I tune mine to run at 12.5-13, and it screams. When I had it on the dyno, right around 13 made the most power. Mine idles right at 13.



Chris</end quote></div>

Chris do u mine telling me little bit more about your setup. And do you think egt on the ds really matter that much. let me know thanks.

 

This is the LM-1 that I use. You have to weld a bung in the header for the O2 sensor. The bung has a cap that you screw into it when not using the sensor. I only use the sensor when tuning. guess you could leave it in there all the time and hook it up to a 2" guage and mount it in the dashboard.

Good AFR is the difference between making horsepower and losing it. The first time I went to the dyno the top end was really rich with an AFR of 11:1. Leaned it out to around 13:1. We picked up 2-6hp in the topend curve on the dyno. We leaned it out a little more, around 13.7:1 and started losing power.

I am by no means an expert on this. I did a lot of reading/research, and testing on my own, and with a dyno. I try to tune mine in at just under 13:1.

Chris