I'm still running the stock pulley and tune with only the mods listed in my sig. Just wondering what Denso's I should get if I were to swap out my plugs? What should they be gapped to?
I beleive they are the same heat range as the agsf22's but not all 03's came with them. Mine came with 22's but last time I checked with ford they recommended agsf12's which are a step colder than the 22's. :shrugUncle Meat said:OK, so IT16's are the same heat range as the stockers. GAP at 0.040" is still the recommendation?
So are you saying I should go with the IT20's versus the IT16's?Shadowgray03 said:I beleive they are the same heat range as the agsf22's but not all 03's came with them. Mine came with 22's but last time I checked with ford they recommended agsf12's which are a step colder than the 22's. :shrug
Im still trying to formulate a decision on this very question myself so Im not trying to tell you to go one way or another. All I trying to do is share some knowledge so you can make a better choice for yourself. I have seen at least 2 different plugs in 03's and I have heard other say there are actually 3 different plugs that came in them. Mine came with 22's and if you call ford now they say to use 12's. I have heard from one tuner that he felt 12's were too cold. Denso says to go one range colder per 75-100hp over stock. I just pulled my 12's and 2 of the 8 were fouled so I dont know if it was due to them being too cold or not? I replaced them with some autolight copper plugs and will check them this week to see how they look. I had IT 24's in my car for a while and it stumbled bad, but I had an exhaust leak too and a slow to respond O2 sensor so not sure if it was the plugs or not, I changed to the agsf12's at the same time I replaced O2 and fixed exhaust leak.Uncle Meat said:So are you saying I should go with the IT20's versus the IT16's?
Dang, .052 seems like a huge gap for a blown engine doesnt it?Jim Vaccaro said:My Cobra came with 32's,,Then Ford went to 12's then changed again to 22's
From Cobra Spec Sheet::
Ignition timing 10 degrees BTDC ± 2 degrees non-adjustable
Firing order 1-3-7-2-6-5-4-8
Spark plug gap mm (in) 1.32-1.42 (0.052-0.056)
Spark plug type AWSF-32EE