|Originally posted by zkhennings:|
I have an MSD Blaster coil (2.8 v6) so I wanted to play with my sparkplug gap. The gaps were all around 0.045 - .0040 inches, and I changed them to 0.060".
I had a very noticeable difference in low end torque. I have yet to compare the top end but I think it will be a little better. Big difference at low rpms though. I have no idea what will happen to longevity, but performance wise it feels good.
Since the gap size has a direct affect on the spark plug's tip temperature
and on the voltage necessary to ionize (light) the air/fuel mixture, careful attention is required. While it is a popular misconception that plugs are pre-gapped from the factory, the fact remains that the gap must be adjusted for the vehicle that the spark plug is intended for. Those with modified engines must remember that a modified engine with higher compression or forced induction will typically require a smaller gap settings (to ensure ignitability
in these denser air/fuel mixtures). As a rule, the more power you are making, the smaller the gap you will need.
A spark plug's voltage requirement is directly proportionate to the gap size. The larger the gap, the more voltage is needed to bridge the gap. Most experienced tuners know that opening gaps up to present a larger spark to the air/fuel mixture maximizes burn efficiency. It is for this reason that most racers add high power ignition systems. The added power allows them to open the gap yet still provide a strong spark.
With this mind, many think the larger the gap the better. In fact, some aftermarket ignition systems boast that their systems can tolerate gaps that are extreme. Be wary of such claims. In most cases, the largest gap you can run may still be smaller than you think.http://www.ngksparkplugs.co..._plugs/installation/
Sometimes I think I am right about,
"For every year you spend in College you lose a year of common sense."
Now before you go off the wall and get all sorts of pissed off at me and do just like every other college educated idiot does when proven wrong but can't accept it why don't you read a few articles by plug manufacturers about just what changing the spark plug gap does, because it does a lot more than what you are talking about.
Did you ever do any Dyno testing of before and after you changed you plug gap?
Because that is the only true way to find out if you are actually getting anything out of what you are doing, you are also changing many other things when you open the gap up on a plug, changing the heat range of the plug you are using would also be a good idea in this case.
just what did you go to college for?
Technology is great when it works,
and one big pain in the ass when it doesn't
Detroit iron rules all the rest are just toys.
[This message has been edited by 84fiero123 (edited 10-13-2013).]