This is reguarding a friends car. He has a 98 JDM B16 swap in his 96 DX coupe and hes gotta smog the car soon. Were not worried about the visual aspect because there are a few local smog stations that dont care whats in the car as long as the motor is the same year of the car or newer and it passes the sniffer.

The motor has oversized JDM P30 pistons, ITR IM, Bored B16 TB, CTR Cams, ITR valve springs, Crower Ti. retainers, Portflow headwork, DC 4-2-1 1pc (99 Si), Carsound cat, AEM CAI, Custom 2.38 Exhaust with ES Tuning Oval muffler.

My question is, how do you guys think this will read on the sniffer? Think it will pass?

I just need some opinions.

Thanks

 

just go to wal-mart and get some 99%rubbing alcohol (small bottle). and pour it in with a 1/4 tank of gas. i do it all the time , no problems . cut timing back to stock and turn the idle down a hair .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by biggdogg &raquo;</TD></TR><TR><TD CLASS="quote">just go to wal-mart and get some 99%rubbing alcohol (small bottle). and pour it in with a 1/4 tank of gas. i do it all the time , no problems . cut timing back to stock and turn the idle down a hair . </TD></TR></TABLE>

what does the rubbing alcohol do? i've never heard of this before... im interested

 

thins out the mixture and burns alot cleaner. also gets the cat real hot so it works proper.

 

He may fail NOX-slightly higher compression, aftermarket Cat. Carsounds are not that bad, but the factory Cat really cleans up tailpipe emissions.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">He may fail NOX-slightly higher compression, aftermarket Cat. Carsounds are not that bad, but the factory Cat really cleans up tailpipe emissions.</TD></TR></TABLE>So you approve of his alcohol trick thingy though? Does that do what he really said?

 

I have no experience with the alcohol trick-so I can't comment.

 

TRUSTme , it works . i do it every year and i pass with flying colors. i passed this year better than i did last year with the same setup and the alcohol . ever open up a an of feul inj cleaner ? take a wiff and tell me what you smell - alcohol .

 

"slightly higher compression"

I guess I've landed on planet B.S.

question

what is the purpose of raising the compression ?

A: increasing combustion chamber temperature.

What is a benefit from this ?

A: increased combustion chamber efficiency, since gasoline is not the fuel only the catalystic maintaining as high of a combustion chamber temperature will result in a more thorough consumption of the catalyst.

leading to lower tailpipe emissions not higher.

Alchohol will also eat away at your fuel system BTW

And the purpose of any head work is to get the engine to burn fuel more efficiently and completely so this as well should only add to better results.

will he pass ?

that depends on many other factors and he may want to get a tune up and compression check / leakdown test before hand.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ninja Kitty &raquo;</TD></TR><TR><TD CLASS="quote">question

what is the purpose of raising the compression ?

A: increasing combustion chamber temperature.

What is a benefit from this ?

A: increased combustion chamber efficiency, since gasoline is not the fuel only the catalystic maintaining as high of a combustion chamber temperature will result in a more thorough consumption of the catalyst.

leading to lower tailpipe emissions not higher.</TD></TR></TABLE>

These statements are erroneous. I am a smog tech and I have to know this crap to fix cars that won't pass. High compression is great for performance, but not so great for NOX emissions. High compression leads to higher combustion chamber pressures and temperatures. When the temperature in the combustion chamber exceeds 2500 degrees Fahrenheit, NOX production goes through the roof. In the old days of two speed smog tests (idle and 2500 rpm), NOX was not measured. Now that we have the loaded mode testing, NOX is measured. One device used to cut down NOX is the EGR valve-it dilutes the intake charge with exhaust gasses, which are basically inert, to reduce combustion chamber temperatures, thus reducing NOX. Most Civics and Integra's do not have EGR valves.
As far as the catalytic converter efficiency goes, a hot catalytic converter is good, to a point. But, high combustion chamber temps do not equate to a hot catalytic converter. The modern catalytic converter functions in two ways: the oxidation portion of the catalytic converter combines oxygen with carbon monoxide (CO) and hydrocarbons (HC's) to produce carbon di-oxide (CO2) and water (H2O). The reduction portion of the catalyst reduces NOX. The PCM (ECU) monitors the O2 sensor and varies the air fuel ratio above and below stoichiometric (14.7:1) to maintain the highest possible catalytic converter efficiency. This info is off the top of my head but it is pretty accurate; I have a ton of reference materials at work that I have to study before I take my ASE L1 and smog tests every few years.
As far as "will this car pass?", you never know.

 

Higher as in JDM p30 pistons

and high as in 12.5:1 JE's are 2 different stories

Plus I'm assuming there is some kind of piggyback fuel tuning here which allows tuning of the air fuel ratio.

 

b19coupe is 100% right. couldnt have said it better. i am also a emissions tech. just cutting fuel back to lean it out might not even work either. leaner mixture also raises combustion temp and then raises nox. co is also greatly affected by air fuel ratio.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by meanEG &raquo;</TD></TR><TR><TD CLASS="quote">b19coupe is 100% right. couldnt have said it better. i am also a emissions tech. just cutting fuel back to lean it out might not even work either. leaner mixture also raises combustion temp and then raises nox. co is also greatly affected by air fuel ratio.</TD></TR></TABLE>

Exactly. On vehicles that are borderline, there is a fine balance between too rich (high CO) and too lean (high NOX). Stock Acura's usually pass with no problem.

 

I'm sorry but what I'm seeing is basically a CTR engine with a header and better than factory headwork.

probably comparable to a stock b18c5

not really borderline IMO