i heard in another thread that a smaller gap size, like .40ish, would make more power. supposably another guy in the thread confirmed it but i want to make sure. would i make more power with a smaller gap with my higher compression?
spark plug gap for headswapped cars
- Thread starter RysRed96GT
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well i played with this theroy since i had a problem with a cyl misfire. i went from the stock .50 something gap to a .40. i felt a real noticable gain. i recommend it.
the misfie actually came from a cracked plug wire
the misfie actually came from a cracked plug wire
CanadaStang
New Member
I had done some research on this when I did my headswap. Found a few threads on here saying .40 is the way to go. But checking over MD, the general consensus is to leave it at .54 I don't know of anyone doing any dyno test with the different gaps.
As to wether to go with copper or platnum, rumour has it, copper is the way to go.
As to wether to go with copper or platnum, rumour has it, copper is the way to go.
onesticker
New Member
I have mine gapped at .35 but I have a blower. I've heard from many people that .40 is the way to go on swapped heads. Stick with copper plugs. The platinum may hive you detonation problems. I'm running Motor craft 12c's which are 2 heat ranges cooler.
CanadaStang
New Member
Yup!! I think thats what you should do. Yup, most definitly. And then, eh hmm, if it's no trouble, could ya let me know how she runs.RysRed96GT said:
i'll do it tommorrow after i put my exhaust onCanadaStang said:Yup!! I think thats what you should do. Yup, most definitly. And then, eh hmm, if it's no trouble, could ya let me know how she runs.
CanadaStang
New Member
Whoo Hooo!!!RysRed96GT said:i'll do it tommorrow after i put my exhaust on
Say,whatcha doing with your exhaust?
CanadaStang said:Yup!! I think thats what you should do. Yup, most definitly. And then, eh hmm, if it's no trouble, could ya let me know how she runs.
just do it!!!!!!!
no seriously, it's worth it, after i had mine done, well after the entire headswap i can easly light up the tires and im in an auto. but after the gap... bigger improvment
CanadaStang
New Member
Thats good to know, I really like free HPtomustang said:just do it!!!!!!!
no seriously, it's worth it, after i had mine done, well after the entire headswap i can easly light up the tires and im in an auto. but after the gap... bigger improvment
Rats, I wish it wasn't so friggen cold here or I'd head to the track tonorrow and do some testing.What did you gap the plugs at after the headswap, and what plugs are you using?
tomustang said:just do it!!!!!!!
no seriously, it's worth it, after i had mine done, well after the entire headswap i can easly light up the tires and im in an auto. but after the gap... bigger improvment
CanadaStang
New Member
That would be Motorcraft AGSF 32PMtomustang said:
Have you ever had any issues with pre detonation after the headswap tomustang?
my car detonates slightly as it is now. platinum plugs gapped at .054 
. maybe this would help me out some.
. maybe this would help me out some.
CanadaStang
New Member
Are you going to switch to the coppers or just regap the platinums?RysRed96GT said:my car detonates slightly as it is now. platinum plugs gapped at .054
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