Wideband o2 sensors?????????
03-29-2005, 11:58 AM
#1
3.0 BAR
Thread Starter
Join Date: Dec 2002
Posts: 3,703
Wideband o2 sensors?????????
I feel like such a noob with this question, but if and when I go to dyno tune my car and I want to use their Wideband, do I need an extra bung for it, or can I just take out the factory sensor for tuning and then put it back in when it's all done.
Management is 450 dsm's and V-afc.
Management is 450 dsm's and V-afc.
03-29-2005, 12:32 PM
#3
3.0 BAR
Join Date: Apr 2003
Posts: 2,260
Re: Wideband o2 sensors?????????
Ya, I wonder the accuracy of those sniffers due to the tempreture drop by the time you reach the tail pipe. I know they're self heated O2s, obviously, but I wonder if EGT plays a part in air:fuel ratio... hotter air, less dense, more saturdation of fuel? Hrm, ..anyone?
03-29-2005, 01:36 PM
#4
3.0 BAR
Join Date: Dec 2003
Posts: 3,092
Re: Wideband o2 sensors?????????
Originally Posted by TurboEF9
Ya, I wonder the accuracy of those sniffers due to the tempreture drop by the time you reach the tail pipe. I know they're self heated O2s, obviously, but I wonder if EGT plays a part in air:fuel ratio... hotter air, less dense, more saturdation of fuel? Hrm, ..anyone?
03-29-2005, 02:17 PM
#6
3.0 BAR
Join Date: Jul 2003
Posts: 6,449
Re: Wideband o2 sensors?????????
Most dyno operators know that a tail pipe sniffier will read a little leaner (a point or two) but they know there specific setup well. So if the sniffer is readin 14, they know that if they had a WB in the downpipe, it would be reading 12...get what im saying?
03-29-2005, 02:24 PM
#7
3.0 BAR
Join Date: Apr 2003
Posts: 2,260
Re: Wideband o2 sensors?????????
Ya.. but.. exhaust pipe length, diameter, number of resonators, muffer size.. cat/no cat, would ALL play a part in an accurate tune.
...do you get pegged with all of those questions on sniffer tube dynos? The ones I have been to haven't said anything about that.
...do you get pegged with all of those questions on sniffer tube dynos? The ones I have been to haven't said anything about that.
03-29-2005, 02:56 PM
#8
3.0 BAR
Join Date: Jul 2003
Posts: 6,449
Re: Wideband o2 sensors?????????
Originally Posted by TurboEF9
Ya.. but.. exhaust pipe length, diameter, number of resonators, muffer size.. cat/no cat, would ALL play a part in an accurate tune.
...do you get pegged with all of those questions on sniffer tube dynos? The ones I have been to haven't said anything about that.
...do you get pegged with all of those questions on sniffer tube dynos? The ones I have been to haven't said anything about that.
i think post cat screws it up even more, im not even sure you can get accurate readings with all the moisture in the mixture after a cat
03-29-2005, 04:16 PM
#10
3.0 BAR
Thread Starter
Join Date: Dec 2002
Posts: 3,703
Re: Wideband o2 sensors?????????
yeah I have no cat either, straight pipe all the way. I eventually would like to own one so I think if I can I would weld a second bung, but I guess for the dyno I don't need it, they'll use the tailpipe thing.
