Cut-Back Plugs...Who's Done it? What plugs did you use?

[XtremeVette]

I am going to use Bosch 7563 (Superplug)....anybody else use these before?

if not what did you use?

 

[Mad-Mic]

i just installed a set of AC Delco's and cut them back awhile ago. didn't install them till now due to the fact i had 2 month old AC Delco Rapid Fires in the car.



i've been playing with plug gap for years now and what i've found especially in the vette is .047 works good for me. the A/F on my car is 12.9 at WOT with out the cutbacks. virgin stock this car ran very rich! the first set of plugs i put in was bosch plat +4's (junk) and after 12k miles they were gluey black! i wish i would of dynoed it then so i knew what the A/F was but now seems like even with a stock FPR that has 45 psi continuous fuel pressure the tune is right on.

although i have not dynoed the differences the car is more peppy and when i drop gears and engine brake the car even in D you can hear the rasp in it now unlike before. i'm very interested to get it to the track and find out if they actually work. i change my plugs and wires cap and rotor every 6 months regardless but every little bit helps.

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