O2 placement with an H-pipe?

[demetk]

Removed the old cat from the e24 and installed straight pipes. Instead of fabbing an X-pipe I decided to fab an H-pipe instead since it's a bit easier to do. Not sure if my O2 placement is a concern but I installed it on one pipe at about the same place as on the original x-pipe.

What do you guys think. Should I be concerned that I'm not sampling all 6 cylinders?

http://i31.photobucket.com/albums/c375/demet_/e28/exhaust_001.jpg~original

http://i31.photobucket.com/albums/c375/demet_/e28/exhaust_004.jpg~original

http://i31.photobucket.com/albums/c375/demet_/e28/exhaust_003.jpg~original

cheers.

[ross1]

It's only going to make adjustments based on what those 3 cyls. are doing. As long all cylinders are doing the same you ought to be all right. Me, I'd move it.

[95525ibob]

Put er on the H pipe pointing up. my $0.02

[demetk]

It's only going to make adjustments based on what those 3 cyls. are doing. As long all cylinders are doing the same you ought to be all right. Me, I'd move it.

Move it to where? I was thinking at the H pipe but I'm not sure how much exhaust flow goes through it.

[ross1]

Move it to where? I was thinking at the H pipe but I'm not sure how much exhaust flow goes through it.

H pipe is the only place common to all six cyls. I think the exhaust there probably is a bit stagnant but perhaps satisfactory for sampling. I'll bet the guys who fab and build race cars could answer this better.

[demetk]

Thanks for the replies. From internet searches most say don't worry about it being on one pipe. I think I may just X-pipe it instead.