Im installing a Zex dry kit on my 94 Cobra, I tried the autolite 23's and they wouldn't fit, Im assuming because of the gt40 heads. What other Spark plugs will work?
nitrous spark plugs with cobra heads
- Thread starter buddyf87
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blksn955.o
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I run NGK plugs in my gt40 (non P's) heads. The plug is a TR6 and is one range colder I have them at a gap of 35. Two ranges colder is only avail. in an irrid. plug and is called a TR7ix or TRi7x or something. NGK goes in reverse from other plug makers and as the number gets bigger the plug gets colder FWIW.
I ended up going with Autolite 103's gapped at .035, they worked fine. I still need to know where the TPS wire is to tap it for the NMU.
95cobraguy
Member
ok got you. found the tps wire, im gonna finish up all the wiring tomorrow, check the timing (prob start at 8* and go down if I need), fill the bottle, and have some fun 
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