Difference between Skinny and Large OS Sensors?

[GoTRicEo0]

We have just finished putting the Blktop Sr20det in my old 1989 240sx. We used the O2 housing from a redtop. Which means we would have to use the skinny O2 sensor (duh) But what I wanted to know is if there is anything wrong with using the skinny over the fat. Proformance wise.

Thankyou-Jeff

[Jesse SR20]

First, why don't you try removing the stock adaptor from the stock O2 extension.

Spray it down with WD40, or a better rust penatrator, then use a closed end wrench and hammer.

I'll bet you the stock black-top O2 fits in the hole the adaptor fit into.

[GoTRicEo0]

adaptor? Well... theres no way I could get the big jumbo blacktop o2 to fit in the skinny housings. It doesn't even screw on. Plus I wanted to know proformance of using the skinny o2 sensor compared to using the big o2 sensors in a black top. Unless I would have to change O2 Housings... but thats gonna be a pain considering the motor is already in.

[180fan]

Doesn't matter. No performance gains or loss from using either one. Use the appropriate one that fits the housing.

[GoTRicEo0]

But the only diff is that I could get the "big" one at my nearest Auto-Zone dealer correct? Then the skinny would have to be ordered.

Thanks for the information tho

[180fan]

The small one can be had locally as well. It's an 87 300zx o2 sensor IIRC. The big ones are from the z32's which is what I'm using so I remember that one. ha ha ha

[GoTRicEo0]

wow your right. But at my local auto zone dealer.. holy cow the skinny one is nearly 140 usd. Yet the big ones.. nearly 60-100 bucks. =/

[jdm_master_X]

how about we steal one from the junkyard. haha.

[GoTRicEo0]

funny funny. W/e works man But new information is nice to know. Since i got some info about o2 sensors from diff fourm's n stuff. I guess we could sell off the BlkTop O2 housing. . . . . .