in need of serious help

dannydee42 · #1 10-07-2005, 11:46 PM

s13 with rb25det...... need inspection..... emisions is not even close. lookin for ideas for a quick fix, might be running rich, not worried about power or anything just to get it to pass. Any ideas at all. Or if any one knows someone in th MA/ southern NH area.

R.W.240 · #2 10-08-2005, 02:21 AM

Get a friend at an emmissions shop to pass you.

or....

1) Lean it out
2) build a downpipe with the cat an inch away from the turbine outlet
3) Get the motor really hot before going in

SkylineUSA · #3 10-08-2005, 02:24 AM

Do you have a power FC?

What R.W. posted is solid.

AWDSR20 · #4 10-09-2005, 03:49 PM

sorry, turbo cars spill lot of unburned fuel, i don't know if one cat can do the job (subraus have like 3?!)

lilskyline240 · #5 10-09-2005, 10:15 PM

sorry to tell ya man...but i dont think ur gunna pass emissions...that motor is not meant for that car.....luckily i registered mine upnorth so it doesnt have to have emissions....ur best bet is to get a friend that is a mechanic to write u a slip sayin u spent like a grand to get it fixed...i think therer is a rule that they have to automatically pass u then...well here there is anyway...

lilskyline

dannydee42 · #6 10-11-2005, 11:01 PM

thanks for the help... i guess. im just looking for someone right now to do it for me. i have 2 months till i need to go again. so if i dont find some one im going to lean it out and hope for the best.
thanks alot tho

lilskyline240 · #7 10-11-2005, 11:29 PM

Quote:

Originally Posted by dannydee42

thanks for the help... i guess. im just looking for someone right now to do it for me. i have 2 months till i need to go again. so if i dont find some one im going to lean it out and hope for the best.
thanks alot tho

yeah sorry to hear bout it....hopefully it all works out...

NissanElitist · #8 10-12-2005, 02:26 AM

Post your results.

I will help you pass.

<--- ChemE major, now in Structural.

lilskyline240 · #9 10-12-2005, 07:12 AM

Quote:

Originally Posted by NissanElitist

Post your results.

I will help you pass.

<--- ChemE major, now in Structural.

How would u help??

dannydee42 · #10 10-12-2005, 04:40 PM

dont have exact numbers with me but about.....
hc's was 8.02 suppose to be 2.00
co was 34 suppose to be 30
nox was just a little over due to overheating thats no biggy

let me know what you think

Pavlo · #11 10-12-2005, 05:57 PM

go to an exhaust shop and make a full exhaus out of catalics. Some guy on Nico (I think) passed a sr20 with 2 cats, 4 will most likely do it for you.

dannydee42 · #12 10-12-2005, 06:10 PM

i have no doubt that would work but where do i get the money for four cats for a 3 inch exhaust. its kind of a waste, maybe as a last resort but right now im looking for something finctional and less complicated. i got 2 months on the reject sticker and i can still get 2 more.
thanks tho in 6 monts if i have to ill use that idea.

NissanElitist · #13 10-12-2005, 10:09 PM

Quote:

Originally Posted by lilskyline240

How would u help??

Because the engine is nothing more than a controlled chemical reactor.

Reactants - Rapid Decomposition of Organic Compounds - Products

Did you pay attention in chemisty at all?

NissanElitist · #14 10-12-2005, 10:16 PM

Quote:

Originally Posted by dannydee42

dont have exact numbers with me but about.....
hc's was 8.02 suppose to be 2.00
co was 34 suppose to be 30
nox was just a little over due to overheating thats no biggy

let me know what you think

With the NOx being so low I have a good reason to say that you have retarded timing.

Retime the engine, the HC's will dip some, but could also be as a result of too high of an operating fuel pressure.

Before you test again, run the engine nearly dry. Then put about 1 gallon of 87 octane fuel in the tank with a single cap full or two cap fulls of acetone (it's a ketone that will help to atomize the fuel by reducing surface tension). It has shown to reduce HC's by a good amount.

The key here is to promote complete combustion at a relatively cold temperature without the use of alcohol or any high octane aromatics like toluene or xylene, both of which are found in high octane pump fuel (~30% toluene in your average mix).

The cold temps prevent the creation of NOx, which are formed when elemental oxygen is bonded to nitrogen during the high heat and pressure combustion.

A catalyst will help to further reduce the HC's and scrub off some of the carbon byproducts.

lilskyline240 · #15 10-12-2005, 10:28 PM

Quote:

Originally Posted by NissanElitist

Because the engine is nothing more than a controlled chemical reactor.

Reactants - Rapid Decomposition of Organic Compounds - Products

Did you pay attention in chemisty at all?

I am very good in chemisty...and i was just kidding...im not questioning ur knowledge...because from what i read, that u write...u are very knowledgeable in all fields of cars..

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