I'm running a TNT wet kit. My pluggs have been gaped at 0.50, And recently dicovered that you are suppose to gap them anywhere from 0.32 - 0.35. What will benefit from this? My best time so far is a 12.24 in 4500 da. Just wondering if I will do any better. Or is it just a saftey precaution?

oh yea i drive a 96 TA
MODS:HPP3, Pulleys, Suncoastcreations hood, and funtional ramair kit, Weld Draglights with some e.t streets, TNT 100 SHT, And flow master....looking into borla/corsa pretty soon.

 

For proper gap it should be from .035-.040 on a colder plug such as Autolite #104/103, NGK TR6 are about the most common plugs use on the bottle.

Vinny

 

The reason for the smaller plug gap is to ensure the spark kernel isn't surpressed. If the gap is large, there is a chance that the spark plug will not fire. Then you'll have raw fuel and N2O flowing into your exhaust system which could then ignite on your hot exhaust headers or cats...

The smaller gap reduces the amount of resistance required to ignite the plug and results in a reduced risk of a misfire.

 

When i gapped my plugs to .35 my check engine light came on...the code was a 171 i think...its detecting a missfire...its doesnt feel like its missfiring though...??? who knows...its running fine though...a friend ran his plugs at the stock .60 gap and burnt up his rings...apparently nitrous was putting the spark out...but when it did spark...boom...loud banks from the engine...and oops there went the rings i recommend .40 gap

 

The plug gap shouldn't have caused a P0171 code unless they were dropped and the white porcelin was cracked (hairline fracture). The misfire could have been from the wires, perhaps one wasn't capped on tight until you regapped them to .040. It just takes one drop for them to get a hairline crack. I put the paper boot over the white porcelin to protect it while installing plugs. Also the metal socket can ding the white porcelin and crack it.

 

well that was good to know