I Recently went from Stage1 to Stage2 w/o toys. My first few test drives were disappointing as mid-top end seemed about the same as before? I adjusted the WG 1 turn - then 2 - then 3 turns tighter. I had 18-19 lbs boost - no apparent spark blowout - stutters - missing - but topend power was just not what I expected. I reread the instructions and saw Mopar recommended NGK 4306 Plugs @ .035. I had been running NGK Iridiums - heat range 5 - at .035 and thought these would be equivalent? The plug were almost new with maybe 300 miles on them.
I though what the heck and installed the 4306 plugs at .035 today. I was getting worried about why no performance for my $870 invested in Stage2. WOW what a difference!!! The mid-top end power was vastly better all the way to 6000 rpms. I really can't explain why a plug change like this could help so much? Same brand of plugs at the same .035 gaps? I can only guess that the 5 heat range Iridiums are too cold. The end and inside of the shell were black and the insulator was medium to dark brown. When I removed them I noticed a small carbon spot on the piston top right under the plug opening. Maybe the colder plug along with the extra richness of Stage2 was somehow causing power loss? In any event in my case the $2 Copper NGK was far superior to the $9 NGK Iridiums for Stage2 even though the same Iridiums performed great with Stage1 installed? The difference going from Iridium to Copper in my Stage2 was Day amd Night.
Why did I see such a big difference? Of course I now know "Read and Follow the Instructions from the Experts" !

 

I don't have a good answer, only speculations. This is very interesting though.

 

hey i have the stage 2 also but when i did it i had the oe spark plugs and it drove good and when i changed the plugs it toltaly changed every thing i also have used 101 octane gas and it changes every thing it feels more powerful.but i have a question about some thing maybe some one can help with. I bout a methonal injection system but when i installed it i loose boost what can i do to make it work?

 

Plugs can have strange effects on how well your car runs. I have had problems with Bosch Platinums ( GARBAGE!!!) and with Splitfires. I usually run what the factory puts in unless you make a mod and a particular plug is recomended.

Here is some advice from my own personal experience.....NEVER run ANY platinum plug unless your car was originally equipped with them. I have many stories
to tell you about what I have seen on my personal cars and cars that enter the dealership. I have the best luck with good old NGK copper plugs.

The only advantage to a platinum plug is no gap change over the life of the plug. They foul very easily, and are usually never the same after they have been fouled.

 

uhh... stock heat range on the car is a 5... stock plugs are Champion's... the equivalent plug for NGK should be a HR5... in fact, you should actually go to a HR6 (which is colder... the higher the number in NGK the colder the plug). This is because during temp. tests in the cylinder the temp's were very high during part throttle load conditions (which is where most of us run our cars... not WOT everywhere). I didn't take the time to look up the stock number you gave... but I can if you want. I have the catalog right here, or I can go ask the DCX account engineer who ran the tests for S2 cylinder temp's.

 

I have read what seems to be an equal amount of bad and good reviews on the stage 2. Problem is for over 1.5k and it being a Mopar product you would expect a higher percentage of good reviews. I was going to get it but now...Im not sure.

 

Pitbull,

short of the wiring concern I had for the HOM... I love Stage 2!!!! put that one under "good reviews"... hehe

 

good except my acc. plug doesn't work anymore and the fuses all look good![:@]

 

s2 - Awesome - no problems, and it made a huge difference. Definitely worth it, plus, you can add on to it and get s3r if you want to go that far, so you get a lot of the 1500 back in a deduction in the s3r price. HOM is fantastic, and the DAB is a big plus.

So one more BIG positive review on s2 with toys.