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Discussion Starter · #1 · (Edited)
i just got my 9mm wires and denso plugs from sparkplugs.com


The horsepower advantage from iridium spark plugs have long been known to the performance automotive enthusiast. They have been documented and dyno'd in magazines such as Muscle Mustangs and fast Fords as far back as 2001. Denso's iridium spark plug line has long dominated the iridium spark plugs aftermarket. Prior to now, they have been unavailable to the SRT4 market due to the unique head and OE wire construction on that model of Neon. Now Sparkplugs.com has designed a socket and wire set just for the SRT4 so they to can take advantage of the increased performance available from iridium spark plugs.

The main obstacles were the extended plug reach (length as measured from the tapered seat to the firing end) of the Champion RE14MCC-5 into the firing chamber. As well as the extended height, (the length of the metal shell and ceramic insulator as measured from the tapered seat to the top of the plug).

http://www.we-todd-did-racing.com/wetoddimage.wtdr/wNTUzNDMyNnM0MTNkZmQzMXk1NDE=.jpg

From the gasket down the Champion plugs have a 1" reach with a tapered seat, that in itself greatly reduced the plug choices available to tuners and performance enthusiasts. The Denso Iridium part# ITV16 is identical thus far, however, the overall height of the Champion plug is 7mm taller than a standard plug which prevents the Iridium plug from properly mating with the terminal connector on the stock spark plug wires. In addition, the 5/8" hex head which allows for plug removal and replacement is 6mm higher on the Champion plug than on traditional plugs. Therefore the hex head portion of the Denso ITV16 would disappear into the engine head prior to the plug being properly tightened. (not a good thing)

This has allowed Champion to maintain a near monopoly on SRT4 plugs. Champion has since released a platinum equivalent being the RE14PLP-5, which is also available at sparkplugs.com, however, it does not offer the performance improvements available from the ultra-thin iridium center electrode on the Denso ITV16.

Sparkplugs.com now has available a custom spark plug socket which has been machined 2.5mm thinner than a standard socket to allow installation and removal of a non OE spark plug into the SRT4. (you can make your own with a standard 5/8 spark plug socket and a ½ hour on the grinding wheel.)

http://www.we-todd-did-racing.com/wetoddimage.wtdr/wNTUzNDMzNnM0MTNkZmQzMXk1NDE=.jpg

Also they have fabricated 2 custom wires sets for use with the shorter Denso ITV16 iridium spark plugs. These are the part #s PTCW8R an 8mm red wire set and the PTCW8B , an 8mm blue wire set (see illustration) (Just released a 9mm version, photos not available yet)

These wires have an extended length connector where the wires reach through the valve cover so they properly mate with the Denso ITV16 spark plug for a tight connection. In addition the 2 and 3 cylinder wires have an optional 90 degree mounting at the top of the valve cover dust cap.

http://www.we-todd-did-racing.com/wetoddimage.wtdr/wNTUzNDM2NnM0MTNkZmQzMXk1NDE=.jpg

In addition to the performance and mileage improvements available from the iridium plugs, there have been pinging problems reported by some Neon owners, If this is a problem with your SRT4, just changing to the iridium’s will help, but there are a variety of heat ranges available in the ITV series which allows you to go to a colder plug which can further reduce pinging. Racers and serious modifiers have also been hesitant to install some engine modifications on the Cruiser (HEI ignition, nitrous, ignition chips) due to the inability to obtain a colder spark plug, which is often necessary with any serious engine modification. The Denso Iridium now allows them a choice of heat ranges up to 4 heat ranges colder than stock plugs.
ITV16 stock
ITV20 1 colder
ITV22 2 colder
ITV24 3 colder
http://www.we-todd-did-racing.com/wetoddimage.wtdr/wNTUzNDQxNnM0MTNkZmQzMXk1NDE=.jpg

the only color they have for the 9mm is red. the wires, plugs, socket, is less than $100 bux if you get the set i think its on their web site now www.sparkplugs.com they also have different colored sleeves. i think that they will do group discounts too
 

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awesome post!

so which plugs would you recommend for the moderate tuner? [s1, wg, profec b s2, etc]
 

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I really need new wires (mine are white) so i might as well get it all.

I'm going to be getting stg 2 w/t , exhaust and fmic,So what temp is recomended for me?
I also need it to work on a stock car untill i get that stuff :)

thanks and great post
 

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I have tried every plug available for the srt-4. The stock champions are BY FAR the most reliable.

The Densos work well when I am spraying but they will blow out under high boost just like every other plug out there.
 

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Discussion Starter · #5 ·
dj-anakin said:
awesome post!

so which plugs would you recommend for the moderate tuner? [s1, wg, profec b s2, etc]
i would recommend for those mods at least 1 range colder but you dont want to get to cold because you might foul the plugs im running the ITV20 in my car if you look at my profile you can see my mods
 

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Discussion Starter · #6 ·
nd4spd 4 a srt4 said:
I really need new wires (mine are white) so i might as well get it all.

I'm going to be getting stg 2 w/t , exhaust and fmic,So what temp is recomended for me?
I also need it to work on a stock car untill i get that stuff :)

thanks and great post
i would go 1 or 2 ranges colder not more than that
 

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Discussion Starter · #7 ·
SRT4B said:
I have tried every plug available for the srt-4. The stock champions are BY FAR the most reliable.

The Densos work well when I am spraying but they will blow out under high boost just like every other plug out there.
im running 20 psi 17-18 till red line i havent had a problem yet my gap is at .040
 

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sgkcrossroads said:
im running 20 psi 17-18 till red line i havent had a problem yet my gap is at .040
I am running S2, basically the same PSI as you. The Denso's are very smooth @ idle & from -20 to +5 but under heavy boost/load they will mis-fire. This is just what I have noticed with my setup. The OEM champions are by far the smoothest from 0-20PSI from my observations especially on the street, they just don't like a 100 shot very much (read: detonation). I run the Densos exclusivly @ the track.

I didn't think you could change the gap on these plugs. I left mine (22s) @ what they were shipped @.

-4b
 

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Discussion Starter · #9 ·
SRT4B said:
I am running S2, basically the same PSI as you. The Denso's are very smooth @ idle & from -20 to +5 but under heavy boost/load they will mis-fire. This is just what I have noticed with my setup. The OEM champions are by far the smoothest from 0-20PSI from my observations especially on the street, they just don't like a 100 shot very much (read: detonation). I run the Densos exclusivly @ the track.

I didn't think you could change the gap on these plugs. I left mine (22s) @ what they were shipped @.

-4b
yah you can gap them diff but it needs to be done right. you have the ITV22s ? im running stg 0 w/itv20s, when i first got my plugs i had them gaped at .035 and i dident have any top end i regaped at .040 or so and run great. i think the denso plugs are not working for you w/out the spray is becuz the stg 2 runs to rich and the plug is too cold, becuz you said that when you use the spray they work fine the added heat and pressure using n2o needs a colder plug i bet if you could get the stock plugs in 2 ranges colder they would run like crap but if you were using n2o they would great, just a thought.
 
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