Will the afr's be effected? Its an innovative wb with the exhaust clip.

But only one exhaust exit will be monitored. Will it effect the reading accuracy?

 

ANyone?

 

Not sure I understand your question, but I would have to say "no" if I do understand it.

 

whats wrong with putting the o2 sensor where its supposed to go?

and yes it will **** up your afrs if you only read half of your exhaust. adds variables.

 

I read the post a few times and I still don't get it haha. But yeah what he said if that's what you're doing with the o2

 

If the amount of exhaust gasses was split equally between both exits, and you had no exhaust leaks along the way, it would be 100% accurate.

But the passenger-side path is shorter, and you can't guarantee that all the gaskets in your exhaust are leak-free, so it's going to change the numbers to some extent. By how much exactly? Who knows? You would need some not-so-fun differential equations and a bunch of wasted time to find that out. I'm sure it will put you in the ballpark, but it won't be as precise as having the sensor in the DP like it should be.

 

Assuming even mixing and an open path between the normal sensor point and the measured point, I doubt it'd be significantly different. More flow might go to one side or the other if the mufflers are slightly different (pipe length isn't a big deal), but I don't think that'd affect any concentrations. This is all in theory, though. Why not do it the normal tried and true way?

 

While technically it would be affected, from a functionality standpoint it'll work fine.

 

Well im trying to give a helping hand to a guy in my town.
IF you dont understand the question ill try to reword it.

I will not be testing my car. I have never seen the car im going to hook the wideband to.(but i do know he has dual exhaust)
THe wide band i have is my brothers. And he has the kit that will bolt to the exhaust can at the rear of the car. Similar to the dyno ones.

The thing is. Mine and my bros cars both have single exhausts. Never tried on a dual exhaust. The wideband kit only has one sensor. DUal exhaust and one sensor. Thats means, Im only monitoring ONE out of the 2 exhaust exits.


I dont know much about his car. But i do know he went from a tuned carb setup to putting back the factory EFI-- ALong with 460cc prim. and 720 Seconds. And its bridge ported.
FUll or half? IDK.

he says his car brakes up between 7 and 8k rpms when it used to do 9k wiht carb set up.

SO i offered to slap the wideband on there so he could have hard factual info on why its braking up.

 

Doesn't the sensor connect to the downpipe? Even though you have dual exhaust, you still only have one downpipe.

 

^^^ not if it's n/a

 

OMG you guys have never heard of dyno style widebands..? Yall making it hard for me. I already said its dyno style but obviously u guys need a pic? let me search


http://performancemotorslouisville.c...24dc13bf5a.JPG


NOW my question makes perfect sence doesnt it?

 

yeah.. i understood what you were saying and still stand by my original post. you are making things hard for no reason.

 

^ Really, do you?

The OP, correct me if I am wrong here, is saying that he does not have a permanent O2 sensor. As in, he put it in the muffler and uses it when needed. A lot like the 'dyno style' he is talking about where people don't use a wideband and have the tuner use a o2 in the muffler to take readings and tune.

OP: You will probably be fine. Worst case just take readings from both mufflers and you should be able to come to a happy medium. Even if the readings are off by a bit, just by seeing the log you should be able to get an idea of whats going on anyway.

 

THanks!

 

I already answered your question above. While technically yes it would be affected, from a functionality standpoint you'll be fine.

However your buddy's problems are not going to be solved through tuning. The problem is that he is using a bridgeport on a stock efi setup. You bet it's going to breakup on the top end. You don't have the flow and the intake tuning is all wrong. To make matters worse a high overlap engine such as a bridgeport must absolutely be using a collected exhaust which means no true duals. He needs to collect the exhaust and then put the carb back on it and his power will change dramatically.

 

... Just wanted to show him if its rich or lean... but with 720's im sure its rich

 

No.

Put as large a tip on the exhaust as you think looks good.

 

It's probably terribly rich. He has high overlap, no scavenging, and a highly restrictive intake manifold. He's probably getting less flow through the engine than it did stock and stock they ran rich. Now he's running larger fuel injectors so it's probably just a flood of fuel. Of course no matter what he's not going to get good power from his setup no matter how well he gets it tuned so it should all really be changed anyways.

 

^ This man speaks the truth!

He isn't called rotarygod for nothing!

 

well im not tunning. BUt i might let him use my 550's to see how that works.

But thats as much as we plan on messing with it.

I understand what u are saying rotarygod.