Passing smog with a Hotshot header

[I am Technoman]

If you need to pass smog with a hotshot header and you have ODB 2 this is my recommendation. Buy a very good aftermarket CAT. Have it mounted on your car buy a very good welder NOT HALF ASSED! Do NOT plumb your FRONT 02 sensor into the hole in one of the runners hotshot says to put it in. Why would you want get a reading from only one cylinder? That’s stupid I think! Put the front 02 sensor into the back of the header in the collector were Hotshot says to put the back 02. Have the welder weld in a bun hole in the pipe AFTER THE CAT. This is were your rear 02 will go. By doing it this way you’re going too make awesome power and get a better 02 reading because you’re reading on ALL cylinders not just # 3 and you will not get a engine light because you have a CAT and everything is RIGHT!

[Aries]

This is a great idea, and works like a charm.THis way, even if #3 burns lean, the motor doesn't oercompensate with extra fuel that could make you fail smog/emissions.Some of us in Houston have been doing this for a while now to pass the strict emissions regulations, and I know the Cali guys have been doing it forever.

[crypt2k]

this is some good insight thanx bro.

[crypt2k]

and for what models is this again... for all 240's or s13/14?

[Aries]

all of them because of the design of the header.It just works.

[I am Technoman]

The Hotshot header can be a ***** to put on sumetimes but after it's on you will have no problems. The header makes nice HP

[R240NA]

If you need to pass smog with a hotshot header and you have ODB 2 this is my recommendation. Buy a very good aftermarket CAT. Have it mounted on your car buy a very good welder NOT HALF ASSED! Do NOT plumb your FRONT 02 sensor into the hole in one of the runners hotshot says to put it in. Why would you want get a reading from only one cylinder? That’s stupid I think! Put the front 02 sensor into the back of the header in the collector were Hotshot says to put the back 02. Have the welder weld in a bun hole in the pipe AFTER THE CAT. This is were your rear 02 will go. By doing it this way you’re going too make awesome power and get a better 02 reading because you’re reading on ALL cylinders not just # 3 and you will not get a engine light because you have a CAT and everything is RIGHT!

That's EXACTLY how my car is done. I moved the front sensor mainly for asthetics, it was only afterward that I realized it was a better place for it. FYI, Random Technology makes a bolt on cat with the rear sensor bunge already welded on, available is 2.5" and 3". I tossed my rear sensor completely though, and it still passes, cleaner than it did when new. Helps that the PCV, EGR, and breather are no longer used.

[I am Technoman]

The rear 02 sensor is a joke it only pulls 1 volt at full throttle. What the hell the that! It makes no changes to the ECU

[R240NA]

The rear 02 sensor is a joke it only pulls 1 volt at full throttle. What the hell the that! It makes no changes to the ECU

Diagnostics only. Same with the crank angle sensor, intake air temp sensor, etc. Throw it all away. Or sell it on ebay.

[crypt2k]

so if i put on the hotshot header on my s13 the "check engine" light is gonna come on?

but not if I follow your steps?

[luis240sx]

If you need to pass smog with a hotshot header and you have ODB 2 this is my recommendation. Buy a very good aftermarket CAT.

What is a ODB 2? and do you have any recommendations for aftermarket CAT's. Im guessing the welder will just make it fit....

[Bobby_Wu]

R240NA:::::::::::will there be any problems if you remove the second O2 senor completely..have you noticed any problems???

[I am Technoman]

I have my rear o2 sensor removed and I have no problems.

[tupac03602]

like luis240 said above what is a odb2???

[S13Ka24e]

On Board Diagnostic (OBD). The 2 is for Version 2. The version 2 is universal, every car after 1996 has the same OBD II program, so if you go into any garage the mechanic can use the same diagnostic unit to test every car for problems. The problem with OBD II is that the emissions changed with OBD I to OBD II making it hardered to pass emissions. I know for illinois they are going to OBD II testing that will just plug into the ECU and check emissions from there. Of couse for pre 1996 car this wouldn't be a problem.

[tupac03602]

well ma car is a 1990 so do i gotta worry about this prob with tha hotshot headers?what prob might i run into?

[sleepyRPS13]

can you post some pics? of the setup..

[I am Technoman]

can you post some pics? of the setup..

My pic's are posted all over this sight!

[sleepyRPS13]

??? of the cat & header pics ??

[Dattebayo]

umm you shouldnt worry. There is only one o2 sensor in the s13 so no problem right? just use the hole at the collector.:-)

[hotshot240sx]

my s13 hotshot header needed no mods...i passed smog with all the proper connections, it wasnt a problem for me, no mods needed!

[apzak]

anyone know a great welder in new jersey area that can have this done? i dont trust mineake after they ripped me off.