SR20 Emissions, Second Gear Strangeness, Mods

[/etc/shadow]

First and foremost - who here actually has the SR20DET and has tried/failed/succeded in getting it inspected? I'm told that at least here in Texas they don't usually bother with a visual inspection and just check the emissions. He says you can pass by taking back to stock boost and then changing the plugs, oil, and cleaning the injectors right before the test.

Secondly, my s13 seems to slip or something in second gear, only at 4000 RPM. I don't notice any other slips or anything. Is that something to be worried about?

Also - I had discussed taking the clutch fan out and putting in iridum plugs but I was cautioned against it by many members of this forum. I spoke with the guy who made the suggestion again and he assumed that you all were worried about heat? He told me that Iridium plugs are made for the Maxima which also does not have a clutch fan. He said that I'd want to use dual electric fans instead of a large clutch fan. Then he said:

"How many cars do you see in SCC or Turbo mags that have clutch fans attached? Not even SR Drifters use clitch fans. Skylines? no Supra? no REX-7? never had it"

I'm still learning so I'd appreciate details on any input given.

[akira0]

I am not very familliar with the reasoning behind not wanting to eliminate the clitch fan off teh KA24DE.  First and foremost, I did remove mine, and installed dual electric fans.  Car runs at the same temp if not a little cooler in Texas heat/humidity.  This will be my second year running it this way.  

The only other thing I did was install a Nismo thermo into the car as well to open it up a lil cooler than stock form.  (opens at 62 C versus 76.5 C stock)

I am not sure who it was that stated to say copper plugs instead of iridiums or platinum, but as we all know, the best conductors of electricity are gold, and platinum. &nbsp;The best spark will come from the Platinums, and the Iridium alloy, &nbsp;All copper is good for is to simply resist heat a little better, but it will not produce a cleaner hotter spark than the other 2. &nbsp;This is a classic arguement rating up theret like plate and bar -VS- Tube and Fin intercoolers... <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

Back to the electric fan mod: &nbsp;There is absolutely no reason why anyone should NOT do this small mod to the car. &nbsp;The cold thermo adds rouchle 2-5 horse, and the removal of the clutc fan will allow for a much stronger pull from 4500-redline. &nbsp;The car has never gotten hot, or neared overheat, and yes, I do have working gagues <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'>. Separate water gague as well as the stock temp sensor, so I know the reading is accurate. &nbsp;

Well worth it people, it takes a little under 300$ and a little bit of paitence to get it all done. In my experience it is well worth the time, effort and money for anyone wanting a little more power out of their N/A's, or any car with a clutch fan attached to it.

[sykikchimp]

I'm not a metalergist or anything.. &nbsp;but doesn't low resistivity = High conductivity? &nbsp;Gold, Silver, and Copper have the lowest resistivity of all metals.. &nbsp;thats why they are commonly used in electronics. &nbsp;(mostly gold and copper) &nbsp;They use platinum b/c of its strength. &nbsp;They have to make the electrode very small to reduce it's resistance to make it fire properly. &nbsp;Copper is a better conductor... &nbsp;but does not last as long as platinum or iridium. &nbsp;(iridium is actually an offshoot of platinum kinda like steel from iron..)

actually I would state exactly this:
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">I am not sure who it was that stated to say copper plugs instead of iridiums or platinum, but as we all know, the best conductors of electricity are gold, and platinum. &nbsp;The best spark will come from the Platinums, and the Iridium alloy, &nbsp;All copper is good for is to simply resist heat a little better, but it will not produce a cleaner hotter spark than the other 2. &nbsp;This is a classic arguement rating up theret like plate</td></tr></table><span id='postcolor'>
except &nbsp;switch copper with "platinum" and platinum with "Copper"

Personally I wouldn't remove the fan for the release of HP which is gonna be unnoticable.. &nbsp;but for the easier revability. &nbsp;It does help a little.

Where did you get the Nismo Thermostat for the KA??? &nbsp;I didn't know they made those?

[/etc/shadow]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Platinum
Platinum plugs are usually constructed similar to copper plugs except that they have a thin coating of Platinum sputtered onto the electrode tips, about 0.010" thick (a human hair is about 0.005" thick). Because of the high melting point of Platinum, the tips can be made significantly sharper without fear of the gap changing shape. But the copper core is still sufficient to whisk the heat away fairly quickly. These are great all-around plugs, particularly for use on NA engines, and they should last a very long time. Very high heat engines should probably not use them because the sharper tips may not conduct enough heat away to prevent pre-ignition under adverse conditions.

Iridium
This is the new guy on the block. They are much like platinum plugs just with iridium in place of the platinum. Because of the extremely high melting point of iridium, they can have very sharp tips without risk of melting and they should last a very long time. These would be best for high-rpm NA engines where the sharpest tip is needed for the best spark, but there is little danger of pre-ignition.</td></tr></table><span id='postcolor'>

http://www.automotivearticles.com/get.php....leid=18 (http://www.automotivearticles.com/get.php?action=getarticle&articleid=18)

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">As shown on the chart, a number of conductive materials may be used in spark plugs. Copper is the best electrical conductor used in spark plugs, followed by Silver and Platinum. While this suggests that the quality of the plugs follows in this order, the melting points of the metals are Platinum at 1773C/3223F, Copper at 1083C/1981F, and Silver at 960C/1760F. These differences allow a Platinum electrode to be designed thinner, with a smaller surface area than that of the other materials. This small surface area allows for much lower arc-over voltages thereby reducing the incidence of misfire. Furthermore, the electrodes can then operate at a higher temperature, burning off carbon or hydrocarbon contamination common in vintage cars which tend to run with a slightly rich fuel mixture. So the bottom line is that a platinum plug usually performs much better than its copper or silver counterpart.</td></tr></table><span id='postcolor'>

<a href="http://www3.bc.sympatico.ca/Volvo_Books/specart6.html" target='_blank'>http://www3.bc.sympatico.ca/Volvo_Books/specart6.html</a>

[sykikchimp]

thats actually pretty good stuff. &nbsp;It goes along with what I was saying as well. &nbsp;so basically platinum plugs should be better in all cars... &nbsp;I will say having dealt with both plugs.. &nbsp;I have seen no noticable difference when running either. &nbsp;so personally I couldn't ever justify the difference. &nbsp;I've never ran a highly modded engine though.