im going to buy a JDM DC Sports 4-1 header that came off a gs-r , but i need to have 2 bungs welded on to the header somewhere for the 02 sensor. if anyone has one of these headers on a b16a1 in a 90 ef hatch, could u please post a picture of where the bungs r located so i can put them in the same spot or somewhere close to it. or u can reach me on aim or email me at norcalhb@yahoo.com. my AIM name is norcalhb
thanx
-matt

 

If your gonna get a header I'd recommend a JG edleblock. They are twice as big as a DC sports header, better flow. I beleive they make one with the 2 O2 ports. There is no such thing as a JDM DC Sports header. They are all made in Corona California.

 

i think he means the jdm style with the larger collector (2.5 inch?). Make sure it will fit in ur EF...cuz i know there is limited space between the motor and the front crosmember. A friend of mine with a B16 in an EF just used one O2 sensor...i guess he jus made both O2 sensor wires read off of one...some ppl say not to do that , but man it runs good! ...so u may not need to make the second O2 bung.

 

you do need to make that second bung, it cost 25.00 bucks

the o2's wont be in the proper locations because its impossible to make the o2 sensor read 2 runners at a time being that its a 4-1 header but its better to run them both toward the collector then to run 1 o2 sensor and jerry rig the other o2 sensor.

 

huh? any disadvantages of just having 2 sensors connected to one? engine light?, performance? and any advantages having this method?

 

axually i had only on O2 in my b16 with dc header adn i got no code,But ur car will run rich.
i didint like it so i went out and got a bung for it well worth the money.
i got no code when i ran the 2 O2 sensors into one.

 

Have the o2 bungs welded so that they are paired (ie. cyl's 1 & 4, cyl's 2 & 3)

then read this thread........ https://honda-tech.com/zerothre...60791

I've got an old RS*R header with factory bungs welded in place. Let me know if you need a pic or if I have time I'll post up.

 

any advantages/disadvantages running rich? will u get more power/torque

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. B in Az &raquo;</TD></TR><TR><TD CLASS="quote">Have the o2 bungs welded so that they are paired (ie. cyl's 1 & 4, cyl's 2 & 3)

then read this thread........ https://honda-tech.com/zerothre...60791

</TD></TR></TABLE>
and how do you propose that he does this, its a 4-1 header, all 4 pipes merge at the collector

 

running rich will cause you to lose power.

 

sometimes it's okay to run a lil bit rich on turbocharged motor ... but not on a naturally aspirated motor

 

but hes got a header so you obviously are running na

running rich
na- lose power
turbo- good but you would gain more power if it was a little leaner (this is why you tune)
nitrous- its better to run rich than to run lean.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowpokesi &raquo;</TD></TR><TR><TD CLASS="quote">
and how do you propose that he does this, its a 4-1 header, all 4 pipes merge at the collector
</TD></TR></TABLE>

......oops!.....my bad......I didn't read that he wanted to go with a 4 to 1 header. You're right. And in this case I would suggest going to a 4 wire o2 sensor.

 

Either get a 4-2-1 header and make 2 bungs, or a chip that only sees 1 o2. I have only heard about the chip method, and never tried it. Ryan

 

What's up matt.

The header actually doesn't have any bungs in it. Matt also has the z10 radius bars on the car, so clearance with the front crossmember should not be a problem. We were just trying to figure out the best place to mount the two O2s. He's getting the header used, so he isn't looking at any othe headers.

Mostly I guess we were trying to figure out where is the best place to mount the O2s, whether right before the collector or on one of the runners closer to the head. Of course not both O2s on the same runner, like one on the #1 runner and the other on the #3 runner.

 

a 4 wire has 2 grounds, one wire is pluged to a power source for the heater, and the other goes to the ecu,

its rumored that if you put the o2 sensor by to collector it wont be hot enough, i for one think that is bullshit, so a 4 wire isnt really necessary,

easiest solutions is to weld one bung, use 1 one wire o2 and chip the ecu.

or have 2 bungs put in, and run 2 1 wire o2 sensors. i guess they can be side by side.

 

okay i do have a chipped ecu and like noahk said i am getting this header used. so since i have two o2 sensor on my motor i need to know where to place the bungs. the ecu that i am running is a Ericks Racing ECU. so should i run one on the #1 runner and the other one off the #4 runner? both of my o2 sensors r 1 wire. and hey WHATS UP NOAH!!!!!!!!!! i htink we wanna try for another dyno run in about a month or so. i will talk to ya

 

jdm dc 4-1 header will have extremely poor ground clearance on 88-91 civics/crxs

 

get the mugen chip, its eliminates the 2nd o2, if your ecu is already socketed the chip will be 20 bucks. thats what we mean by chipping ur ecu

 

will the clearance be any different than the stock header? cuz right now its pretty freakin low on the clearance part. and for the ecu, not sure if it is socketed or not. i know that the plugs are the same. I know it just has a chip (Ericks Racing).

 

yes it is a lot lower than the stock header.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowpokesi &raquo;</TD></TR><TR><TD CLASS="quote">yes it is a lot lower than the stock header.</TD></TR></TABLE>


too low for my tastes. i had a skid plate made and its already 99% gone