I'm having Texas Speed build me a LSX 454 and I would like to put O2 sensors on each exhaust to better tune the car. My question is which O2 sensors are the best for this type of set up?

 

as far as i know there isnt a system out there that can use 8 O2 sensors.You can either use the FAST dual wideband setup to monitor each bank.....OR get 1 of the systems with 8 EGT probes.

 

8 O2 sensors i think is overkill, u can still get extremely accurate readings from just 2 widebands, one in each pipe. thats what i would do n e way.

 

Well, I guess if you are going to go that route, I would recommend the AFM 1000 from ECM. You could then get a good data logging system from Racepak. Or, you could go with their plug and play widebands.
What is the reasoning behind doing this anyways? Unless you are using a very hi tech ECM that has the ability to tune cylinder to cylinder, you might just be spending money you don't have to be.
Plus, to do that you need to have the O2 sensors in the exact same location on each pipe, otherwise you are really just guessing. I know when I have dyno'd with 8 O2 sensors, you are looking for cylinder balance for design more so than tuning. But hey, to each his own I guess.

 

My plan is to run a RacePak system logger with a Haltek system. I saw this on another car and thought it would be a nice way to tune each cyl. individually. I just don't know how it's done yet.
I know it's not necessary, but I'm a data kind of guy and like to tinker with stuff.

 

I think that 8 EGT probes would be your best bet rather then going with 8 wideband sensors, the packaging woudl be alot easier, and it's gonna give you the cylinder balance check that you are looking for.

 

Narrowbands are not going to help you tune for
power, and wideband LSU4 type are not going
to tolerate close-in temperatures. I think a pair,
at the collector of each side, and count on (work
to get) component balance intra-bank is your bet.

Don't know what the deal is with the expensive
wideband sensors, re max temperature, but bet
you don't want 8 of those at >$300 a pop.

 

The only way I know to change to A/F ration in each cylinder is the port the intake or the head. Good luck with that.

 

I believe most aftermarket control systems allow for individual cylinder injector pulse tuning.

 

BS3 definately allows the fueling for each cylinder to be controlled seperately, and if you're looking at nitrous, directport setups can also allow for tune adjustments for each cylinder.

 

Thanks for the info. Although I have to admit, this whole electronic ignition stuff and acronyms I'm a little behind on. What is the BS3?

See I come from the drag racing world so I know split dominators Hogans manifolds, 1200+hp stuff. So this set up for me is all new. I'm pretty computer Knowledgeable but I need to get a grasp on this stuff.

Thanks in advance for the Laymen’s terms.

Greg

 

http://www.bigstuff3.com/

 

If I were trying to balance fueling beyond what a
matched set of injectors provides, I think I'd look
at the O2 sensor waveform real time, try and
distinguish the individual cylinders' "plateaus" and
observe whether you are pushing the one being
twiddled, closer to or further from center. In the
collector this ought to work reasonably at lower
RPM, maybe too much blending at higher RPM.
But have seen some SAE papers which kind of go
that way, looking at individual-cylinder fuel
management on the cheap (syncing the O2
sampling to time-of-flight etc.).

 

You can't put wideband O2 sensors to close to the exhaust port, so keep that in mind.

Jim

 

x2-egts would show a nice heat balance between each cyclinder-

8 o2s is like f1 stuff-dont even think they run that on race day-all egts-

more power,and trq u make the more heat something will make-

egts^^^ is what u want-

i have tried most 02 kits out their and most of them are within each other-

they just got some cool things to spice them up a bit which makes them different from one and other-they read the same-

u can get a 4 channel 02 kit from racepack for $2000.00 per bank $2,000x 2=$4k

or a nice fast dual kit for about what-450-650 with all the features-

i know the more data u have the better the job can be has long as u know what to do with that data-but sometimes it leads into a wrong direction because the product is not needed for the job

egts all the way unless u really keen on the 8 o2's and got cash-

would be a pain to work on if the car had no room

What car is this going in?

Thanks

Nick--

 

yes-jim- i was told that not due to the heat temps but the carbon depoists getting stuck on the sensor-

a freind of mine tried that and got about 1 month out of a sensor-

 

I just want to thank everyone for their input. I have tuned to the EGT's before while drag racing and it does work quite well. I just thought that using O2 sensors might be a little more informative?

Either way, thanks again! I will probably do the EGT's due to cost. I am going to be putting on a RacePak v300 on the car, so if I do ever get some cash together later on I could put on the o2 sensors for something to screw with.

Like I had said before I like all of that computer work to tune, it's similar to something I do for work. I test missile guildance systems for a living and we use a data acquisition system that almost mimicks a RacePak graph.

Anyways, thanks guys...keep up the good work. I really like this site.

 

I saw this title, I was wondering where the hell 8 of them were going..lol

 

which one u getting the racepak v300 or the v300sd?

 

Not sure? What is the difference between the two?