Lesterg69 Posted February 5, 2013 Report Share Posted February 5, 2013 I am running LMS stage 4 on 93 octain fuel. Has anyone tryed to run a colder spark plug to help reduce the chance of pre ignition. I think I might hear a ping every now and then since the temp has been colder, but the car runs so damn good right now I dont want to change tunes. Any ideas or feedback would be great! Quote Link to comment Share on other sites More sharing options...
racerx78 Posted February 5, 2013 Report Share Posted February 5, 2013 On my MS3 when i was running more power i ran Denso step colder plugs. Denso ITV20 is replacement IR plugs in our stock heat range. ITV22 is the step colder plugs for our car. If i ever decided to turn the car i will be running the ITV22. Quote Link to comment Share on other sites More sharing options...
bpd1151 Posted February 5, 2013 Report Share Posted February 5, 2013 I've been using the NGK Iridium IX's (p/n LTR7IX-11, or stock no. 6510) for quite some time now, w/o any issues whatsoever. These are the equivalent to the Denso ITV22's. Even in the recent cold snap here in Chi-Town, where temps were routinely in the single digits during the day, sub zero overnight, no issues. Quote Link to comment Share on other sites More sharing options...
Lesterg69 Posted February 5, 2013 Author Report Share Posted February 5, 2013 Would it be a good idea to go ahead and change from stock plugs Quote Link to comment Share on other sites More sharing options...
racerx78 Posted February 5, 2013 Report Share Posted February 5, 2013 That depends. Typically if your stock, and run a good top tier gas and you don't live in a dusty environment, the stock platinum plugs should be fine for 100K miles. Lower quality gas leaves more deposits on everything in the combustion chamber including the plugs. Modded engines depending on the level run hotter especially when racing and step colder plug would help combat knock and overheating/melting the plug. In general IR plugs perform better than Platinum but also cost more, and that performance increase isn't one that you can always tell from your butt dyno. Quote Link to comment Share on other sites More sharing options...
Crash712us Posted February 5, 2013 Report Share Posted February 5, 2013 I run Denso itv22 with my stage 5 tune. Quote Link to comment Share on other sites More sharing options...
pacoflyer Posted February 5, 2013 Report Share Posted February 5, 2013 I also run the Denso ITV 22's. Quote Link to comment Share on other sites More sharing options...
bpd1151 Posted February 5, 2013 Report Share Posted February 5, 2013 There were a handful of EB owners who were experiencing failure(s) of the stock plugs. Due to high operating temps, the ceramic in all the cases I heard of, would deteriorate, and cause a portion of it to break off, and subsequently fall into the engine internals, causing catastrophic failure. I chose a colder plug both for that reason alone, as well as the minuscule performance gain(s). Seems like most have been opting to roll with after market plugs in general. IDK if the OEM plug issue was resolved, or not. Sent from my DROID3 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
19cobra99 Posted February 7, 2013 Report Share Posted February 7, 2013 Doing some research I came across Denso's application chart. Apparently the SEL, SE and Limited use the ITV22 gapped to .032. The SHO uses the ITV20 gapped to .044. This doesn't make sense to me. I would think the hotter plug would come in the non-turbo. Quote Link to comment Share on other sites More sharing options...
racerx78 Posted February 7, 2013 Report Share Posted February 7, 2013 According to Denso's IR site all the taurus 3.5 motors FI and NA all use the ITV20 for their stock heat range. Quote Link to comment Share on other sites More sharing options...
19cobra99 Posted February 7, 2013 Report Share Posted February 7, 2013 [ATTACH]1684[/ATTACH] ITV application chart off Denso's site Quote Link to comment Share on other sites More sharing options...
racerx78 Posted February 7, 2013 Report Share Posted February 7, 2013 Interesting, this too is off of their site, but the one directly for their IR plugs - Denso IR Quote Link to comment Share on other sites More sharing options...
19cobra99 Posted February 7, 2013 Report Share Posted February 7, 2013 Lol so the guys at Denso don't even know. I think I'll order the NGK'd today and give them a shot. Quote Link to comment Share on other sites More sharing options...
Boggus Posted February 7, 2013 Report Share Posted February 7, 2013 So the Denso ITV22 is the same as the #5430 ITV 22? Looking at sparkplugs.com. They have them listed as $9.99 each. Quote Link to comment Share on other sites More sharing options...
racerx78 Posted February 7, 2013 Report Share Posted February 7, 2013 Looks like it. You can also get them from Amazon for $9.11 with free shipping for a set Quote Link to comment Share on other sites More sharing options...
Crash712us Posted February 7, 2013 Report Share Posted February 7, 2013 Got mine off eBay can't remember what I paid but seen auction for set of 6 for $52 Quote Link to comment Share on other sites More sharing options...
Lesterg69 Posted February 12, 2013 Author Report Share Posted February 12, 2013 Thanks to all for the info I went with the NGK LTR71X-11 factory gap is .035 what should I gap these plugs at. Quote Link to comment Share on other sites More sharing options...
19cobra99 Posted February 12, 2013 Report Share Posted February 12, 2013 I gapped my factory plugs down to .032 and with the stage4 I still feel a very slight stumble under high loads. With the factory plug gap I got scared a few times under high load high speed pulls, I thought something was amiss, turned out to just be the plug gap at .044. When I get my new plugs I'm going to go down to .025 which I read on "Full-boost" article that is ideal for higher than stock boost pressure. Quote Link to comment Share on other sites More sharing options...
jdeprato Posted February 14, 2013 Report Share Posted February 14, 2013 High boost pressure can litterally blow out the spark, which is why you really need a lower gap on the plug...or at least that's what I've always understood... Quote Link to comment Share on other sites More sharing options...
racerx78 Posted February 14, 2013 Report Share Posted February 14, 2013 I typically stay on the lower side of the factory gap range of a stock boosted car. since the engineers designed it to work within that range. Most of us here aren't adding 50% more boost so there isn't much more pressure from the stock setting that would blow out the spark. Also if you gap the plugs to low you wont get enough spark to fully combust whats in the cylinder. If you are switching to IR plugs then they have a smaller electrode that allows for a stronger spark with less resistance and change of blowout. Quote Link to comment Share on other sites More sharing options...
Slowsho Posted February 14, 2013 Report Share Posted February 14, 2013 I need to gap my plugs this weekend. I'm having a feeling thats why im having issues with my tune. Hopefully be sorted out tomorrow. Quote Link to comment Share on other sites More sharing options...
Crash712us Posted February 14, 2013 Report Share Posted February 14, 2013 From what I know from people that have had cars dyno tuned. Spark blow out hasn't been a issue, up until modded turbos running 20psi of boost. Quote Link to comment Share on other sites More sharing options...
jdeprato Posted February 14, 2013 Report Share Posted February 14, 2013 I thought I remembered having that problem with my 99 Cobra with a Procharger only running 10 psi, but then again the procharger pushes a really large volume of air so maybe that contributed to the problem...plus the procharger is different than a turbo, but similar in how it delivers the charged air... Quote Link to comment Share on other sites More sharing options...
Slowsho Posted February 14, 2013 Report Share Posted February 14, 2013 Idk what it is then. I have SCT tuner from Livernois and i swapped the maps and the car is slower than stock. Idk what else it can be. No mods took off the intake flash the tune and the car is slower. Any advice? Quote Link to comment Share on other sites More sharing options...
bnoon Posted February 14, 2013 Report Share Posted February 14, 2013 Idk what it is then. I have SCT tuner from Livernois and i swapped the maps and the car is slower than stock. Idk what else it can be. No mods took off the intake flash the tune and the car is slower. Any advice? Are you logging any knock, fuel issues, or air issues? That is all you need to do to figure it out. Quote Link to comment Share on other sites More sharing options...
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