WOT correction OFF with Alky?

the sensor on murphs is razors 150psi sensor

I'll get the part number when I get to the shop. I highly recommend it to the pump/alky guys. The part number isn't really the important part. Any plug that offers a very short ground electrode would work.

This is an old pic of one in an old set of Champion plugs out of my engine. This is what my old plugs look like when I change them out. Methanol is such a great fuel. The copper color on the threads is anti-seize. This is a very cold plug. For gasoline, you would want to use a hotter heat range to burn off carbon deposits.
Notice the very short, fat ground strap. Short to the point that this plug is really a side gap plug. This is how they come, out of the box. No modifications required. Very remote chance of turning the end of this ground strap incondescent and having it cause preignition with a touchy tuneup. Believe me, I know this from experience. You'd swear I was trying in more than a few hairy runs I've made where the tuneup went awry. Came out of them with absolutely no damage. I owe it all to these plugs.
Imagine being halfway through the quarter and the fueling goes to high 13s to one for the rest of the pass. Could you faster gas/alky guys get away with that? I really doubt it. And, if I had been using the NGKs, the video in my sig would have turned out to be a video of me scattering my motor all over the top end of the track. Yes. In the video in my sig, halfway down the track the engine leaned out big time due to two problems that surfaced with my fuel system. You can hear the engine lean surging after the 1,000 ft. mark. I would not have gotten away with that with the NGKs. The ground electrode would have got too hot and would have lit off a preignition spectacle for all to witness.

I've brought this spark plug thing up before. I sure hope some start paying attention.

This thread has motivated me to move the AFR target on my TT chip to 10.0

Set it at 10.6 right now for 20psi just messing around with it until I can get the ET streets on it. Lots of good info in here.

Why would the fueling go 13:1 halfway through the pass? If something is wrong, the 13:1 would show up out of the gate. Poor planning is no excuse. I did a Weldon and better fuel lines to feed and return without restriction. I run with a full tank of 93. I check alky level and top it off before each run. I hit the alky test button before each run (even on the street when getting on it). My casper's knock guage lights up like 4th of July if there is any problem detected under boost. I also glance during the run at the wideband digital gauge to make sure it starts with a 10.xx. There are a few checklist items to lessen the chances for a 13:1 A/F. My TT chip auto corrects fueling to compensate as needed to keep the target A/F and I run bigger injectors and pump than I probably need at the moment. And no, 13:1 won't last for the whole run on a 93/alky TR

When dealing with alcohol, the time it takes to say 'POP' is all it takes to do damage associated with preignition. Most people will get out of the throttle when they hear the 'POP'.

This is the information on the Champion racing spark plug.
14mm thread
3/4" reach
5/8 hex
regular gap
Gasket seal
Stock # 293
Part # C53CX
Will fit M&A heads I know for sure.

This makes me smile. In the world of mechanics and electronics, there is always going to be some situation that cannot be accounted for ahead of time. The run in my sig is a very good example of a perfect storm. Something you cannot prepare for. I have a thread in the timeslip section that has the datalog posted of this run. You think 13:1 won't last for most of a 1/4 mile pass? Welcome to my world. I didn't think it was possible either. Study the datalog. It's very clear. You can even see the rpm surging in the datalog during the last section of the run. That run yielded an 8.76 ET! I know. Impossible, right? You think I wasn't pulling plugs soon after I was able to study the datalog when I got back to the pits? You can bet I pulled every single plug. I was expecting the worst. I know what I would have found if those NGKs were in there. Not to mention, I probably would have had to of been towed back to the pits. I even scoped the cylinders when I got back to the shop. NOTHING. The plugs laughed at me. "What did you pull us for? See, we're fine." I changed them out anyway. It was truly an amazing experience. One I don't wish on anyone. But, the experience did teach me a whole bunch. I am stuck on these Champion plugs.
The situations that caused my lean out episode;
The signal line to the fuel regulator developed a leak. Fuel pressure was not rising properly in relation to boost rise. That's not all.
I run a voltage booster for the fuel pump. I depend on it to supply the needed volume of fuel this engine drinks. It is set to come on at around 5 psi boost and the setting is at max voltage boost (50%). One of the wire terminal ends burned at the relay that controls the voltage booster. It was like a conspiracy brought about by the Champion plugs. "We're going to show you just what we can do for you, sucker."

I do not use O2 correction at all. I do not use any sort of a/f warning device. My experience with alcohol has taught me that if alcohol wants to bite you, it's going to do the deed way before you can react to any lights or buzzers. 'POP!' That's been my experience. That's how fast it happens.

I might give these plugs a try next time I pull them out. Mine looked clean a few weeks ago when I took a look. I tend to get on the alky a lot cruising around on the street and its a dual nozzle. I try to keep it simple on my car. One big fuel pump hotwired, let the wideband correct fueling for WOT boost variances and LS7 MAF + translator for cruising using the stock computer. Of course my car is slow for now.

Here's the datalog of the run that should have left my engine scattered about the track. The 3 bar map sensor that was on the car at the time was also being tapped out.

Here are a couple of links to an NGK heat range chart and a Champion Racing plug chart. Based on what I am seeing, the 57 Champion heat range is just slightly colder than the NGK 9 heat range I am running now. I will give the C57CX a try when the weather improves around here.

http://www.ngk.com/glossaryImage.asp?imgID=721

http://www.federalmogul.com/NR/rdon...4E-8D6E-0EDA0948D1A7/0/Champion_race_plug.pdf

Don your Champion Plugs would work in a pump gas/alky car better than the NGK's?

whats the nice plug for cast iron heads?

i can't see this picture can you please repost it or E-mail it to me?
thanks