Cobb Stage 2 OTS - Need Colder Plugs?

[Peter H]

I just installed my new AP and loaded the Stage 2 91 octane map. I like the result but will probably end up going with a custom Dizzy tune.

While I run the Cobb tune, do I need the step colder plugs that Dizzy recommends for their Stage 2 tunes?

 

[LuvPug]

No, I ran Cobb stage 2 with OEM plugs for several thousand miles before getting a Dizzy tune and had no drive-ability issues. I did install colder plugs for the Dizzy tunes (93 and E30) but have not tried them with the Cobb tune. It runs so much better I have no desire to switch back

 

[theblue]

No, I ran Cobb stage 2 with OEM plugs for several thousand miles before getting a Dizzy tune and had no drive-ability issues. I did install colder plugs for the Dizzy tunes (93 and E30) but have not tried them with the Cobb tune. It runs so much better I have no desire to switch back

can you elaborate on the better. As somebody a few weeks into being stage 2 off the shelf cobb I'm curious what gets better?

 

[JorJorBinks]

On my last fiesta here in SoCal on 91 I would get knock around 20psi on the stage 2 setup. Went with ngk 1 heat range colder and was able to see 20.5psi and 21 on occasion with less knock. Stratified sells e30 tunes and I highly recommend their tunes if you want more performance, earlier boost, 25psi even in the heat, and a cheaper tank of gas.


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[LuvPug]

can you elaborate on the better. As somebody a few weeks into being stage 2 off the shelf cobb I'm curious what gets better?

Throttle response is improved, a bit more boost/power, and the engine feels smoother. Just a seat of the pants opinion as I don't have dyno sheets or other hard numbers but it was a difference I immediately noticed! I think the Cobb tune is simply very conservative. E30 is all that plus more, worth it if you have E85 pumps nearby.

 

[Tanner@FingerTuning]

Generally it's recommended to go ahead and just grab a set of step colder plugs if you're tuned in general. I'd argue it's perhaps even more important on a Cobb OTS tune since their knock response in general is dialed back a bit too much for my taste.