View Full Version : Spark plugs gap and spray

01-16-2011, 08:58 AM
what is, if any, is the general rule for gapping the spark plugs when using spray?

01-16-2011, 10:46 AM
I've always gaped my plugs @ .030-.035 to avoid blowing the candles out. A multiple spark discharge system along w/ a high output coil is also a good idea as well. JMO

01-16-2011, 11:25 AM
Im running around .45, Ill pull it down and close them.

01-18-2011, 07:41 AM
How big of a shot and do you have any aftermarket ignition components? I run mine at .027, but I'm also spraying 200 on a 14:1 motor LOL. With the old 75 shot setup I think I had them around .035-.037.

01-18-2011, 09:40 AM
Ive been spraying 150 and my plugs are at 34. Its a mod motor and all I have on it is the msd coils. I was just told that my nozzle is to far away and my intake isnt the best for spray. Im running the trickflow and my nozzle is before the T.B. So its about three turns and a foot before it gets to the bottom of the intake. So should i move the nozzle down towards the bottom of the upper piece of the intake???

01-18-2011, 09:44 AM
how do you know if your blowing the spark out??? my car isnt running on the other end. either Im on the rev limiter or something else is wrong.. the car doesnt pick up very much no matter what I spray to it. the factory tach says im at 6000 but how far off are those things?

nx 5.0
01-18-2011, 12:27 PM
wow i would move the nozzle for one and set you plugs at 32 it sounds like you need to run a colder plug i think your blowing out the spark i have been running a NX wet kit for the past 5 years and i have had all kinds of weird things happen

01-18-2011, 12:35 PM
so ill move the nozzle to the back of the intake where the upper bolts to the lower so it will have a straight shot , and close the gap to 32. the motor im running also has a more compression than stock, -10cc instead of the -18cc pistons. sparkplugs are tr6.

01-18-2011, 02:12 PM
You might talk to KT over on Htown. I know he was spraying the $hit out of a PI headed/intaked 96GT back in the day. Pretty sure it was not a NoZZle setup.

But all the things I hear on those mod motors, I think I would rather go with the Nozzle setup instead of chancing spraying into a plastic intake. Moving the nozzle to the back might help though, the less turns it has to make the better.

01-18-2011, 02:25 PM
The intake is the trickflow alum. . Im reading up on how to datalog w the sct , so I can see whats going on. make sure the maf is pegged, etc, etc,