spark plug gap on headswapped gt?

[RysRed96GT]

i hear that a smaller gap is better for headswapped cars due to the added compression. i was told around .04" or slightly higher is good instead of my .054 now. what do you all think?

also, i picked up some regular copper autolite 764's. is this ok? or should i switch to a colder plug? thanks!

 

[bdcardinal]

the 764's are fine for that. and the .04 gap sounds about right as well.

 

[Iniquity]

Ryan just gap them and see the difference. i told you before to try it. .40 is what i told every one.

 

[RysRed96GT]

thanks guys i'll gap 'em tommorrow.

iniquity, did you try this and feel a difference?

 

[RysRed96GT]

*UPDATE*

ok, i regapped them to roughly .042. i drove the car and immediatly felt a difference. the car doesnt hesitate anymore when i get on it. the power comes on smoother than before. and i actually feel more torque all around. may be suttle, but i honestly feel it and the car sounds and runs healthier now.

 

[98stangv8]

*UPDATE*

ok, i regapped them to roughly .042. i drove the car and immediatly felt a difference. the car doesnt hesitate anymore when i get on it. the power comes on smoother than before. and i actually feel more torque all around. may be suttle, but i honestly feel it and the car sounds and runs healthier now.

the guys from modularpowerhouse told me they were going to gap mine at .048 when they do my work...

 

[Iniquity]

RysRed96GT - Told ya. Huge difference in 2nd @ WOT.

 

[RysRed96GT]

RysRed96GT - Told ya. Huge difference in 2nd @ WOT.

nice difference all over actually.

btw, how long to copper plugs usually last?

 

[Iniquity]

copper plugs are very reliable, they last for awhile.