03/04 cobra guys... what are you plugs gapped at?

[DarkVador]

For the local guys with chip & pulley 03/04 cobras... what plugs are you running and what gap is it set at? What is your timing @ WOT at around 6000 RPMs? And what is your 1/4-mile MPH trap speed? I just want to see what the correlation is with the different settings.

Mine:
I run the Denso IT22's @ .031 gap.
23 degrees of timing @ WOT at around 6000 RPMs
117+ MPH at PIR, 118+ MPH at Woodburn.

 

[Jon]

Hey Tou, good to see you active again!
If you are ever out this way you should swing by the shop and say hi!

We usually gap between .030 and .035 depending on boost levels.
Typically we run NGK copper plugs. They are cheap and last well.

Here is a breakdown of the plugs and heat ranges:

Spark Plugs
Ford Modular

MOTORCRAFT

PART# / HEAT RANGE
AWSF-32C / stock heat range - copper plug
AWSF-22C / 1 Heat range colder - copper plug (Truck application, knock sensor)
AWSFA-12C / 2 Heat range cooler - copper plug
AGSF-12FM1/ (fine wire electrode) 2 steps colder (.044 gap) (Stock L plug)
AGSF-32C/ Recommended for FRPP heads (Full thread) stock heat range

NGK

PART# / HEAT RANGE
TR-5 / / 1 step hotter than stock
TR-55(IX for iridium)/ 3951/ Stock Heat Range
TR-6(IX for iridium)/ 4177/ 1 Step Colder
BP7EFS (PN - 3526) two steps colder
BR7EF (PN - 3346) two steps colder
R5724-8 (PN - 7317) two and a half steps
R5724-9 (PN - 7891) three steps
R5724-10 (PN - 7993) four steps

AUTOLITE

PART# / HEAT RANGE
764s / Stock heat range
103s / 1 heat range cooler
AR94 / 2 heat range cooler -
AR93 / 3 heat range cooler
AR92 / 4 heat range cooler

CHAMPION

PART# / HEAT RANGE
YS-59C / -3.5 below stock heat range

DENSO (.38 gap)

PART# / HEAT RANGE
IT16 / stock heat
IT20 / -1 heat range #5326
IT22 / -2 heat range #5327
IT24 / -3 heat range
IT28 / -4 heat range

 

[jordanvraptor]

I run AGSF-22FM1 Motorcraft plugs and regapped them at .035 and my trap is 110-114 mph depending on tune. The early Cobras came with the -12FM1's but when they changed my cylinder head they gave me these. The current Cobras now are getting the -22FM1's.

 

[DarkVador]

Jon... good to hear from ya again. Thanks for all the info on the different plug types.

Here's a question for ya. If a car runs a little rich, does it make more sense to widen or close the gap?

-----------

Jordan, have you tried other plugs and see if it makes any difference on top-end speed?

 

[BLK_DVL]

mine have been gapped to .035 since we changed the plugs almost a year now with no issues.

No track times or trap speeds yet, hopefully next week I can find out.

 

[jordanvraptor]

No, thought about NGK TR6's to hold off pinging though...

 

[DarkVador]

mine have been gapped to .035 since we changed the plugs almost a year now with no issues.

No track times or trap speeds yet, hopefully next week I can find out.

Go for it. I am very interested to see how your car performs, especially with a ported Eaton and custom tune! Your car should be right around 120 MPH.

 

[BLK_DVL]

Ya Id be happy with a 120 trap speed for my first outing ever. Seems like the trap speeds are real low at PIR based on what I saw this past Saturday.

Lots of the guys with the same setup as me were trapping in the mid 120's, but they are at the track like everyday. Im far from the being a professional, 8,000 miles under my belt driving manual

 

[The Factor]

My NGK plugs are gapped at a tight 35..and timing i think now is at 21 or 22 wot.It was 22 and we lowered it at toque freaks and my HP/TQ#s went up

 

[BLK_DVL]

Cool, what did you make at the dyno? Did you end up advancing the spark?

 

[The Factor]

no we actually backed it up a little but still got good #s

 

[Jon]

Tou: opening the gap should burn more fuel. Or we can burn you a different file for the Diablo.

 

[00ZincGT]

NGK TR-6 gapped at .036. Dynojet SAE #s 454.4 HP 472.4 TQ
One trip to the track, best of 4 runs on street tires 12.855 @ 112.44. 2.169 60'
Timing at 22 *
Dave

 

[ricksgt]

22* timing....gapped at .038...will find out tomorrow track times.. TR6's

Rick