I have a set of SLP 1 3/4 on my car with TF angeled heads. on number 8 the plug is VERY close to the tube. When the boot is installed there is literally 1/16 gap between boot and header. It archs all the time with a nice blue spark. I pulled off the wire to find the boot on the plug in mint condition. No burn marks, no cuts, not dried out. How would a spark still be able to go through the boot without hurting the boot? Any other ideas? Thanks

 

Sounds like its time for new wires. How old are they?

I can't remember exactly what they are called, but there are some heat jackets you can get for your plug wires to shield them from contact with headers. That might be a good idea if the wires are that close to the tubes, whether they arc or not.

But, like I said, I can't remember what they are called, but I know Summit has them, I've seen them there before.

 

Brand new. Its going though the boot, but thre isnt anything wrong with the boot.

 

Did you cut them yourself or are they precut? Sounds like the core pc. was left too long and it's leaking right past the boot. It's arcing right near where the wire enters the boot?

 

i did cut myself. its arching at the 90* bend on the bottom and going to the header tube 1/16 underneigth it

 

?? Your headers are underneath your plugs? Clarify that one I'm a tad confused there. Do you mean that the arc it from the corner of the 90º bend and it arc up to the header?

 

Number 6 primary goes back and below number 8 plug. NOT DIRECTLY underneigh but below the plug and out 1/2 inch

 

What I suggest is making a new wire for that particular plug. Another thing you could do is lower the gap on your plugs.

 

Plug Gap is .035 already. As I mentioned before. It archs down. The number 6 primary tube swings out and slides under the tube. The tube is 3/4in under the plug while the remaining 3/4 of the tube is out past the plug. The tip of the plug is almost in the center of the tube passing under it.

 

Not my car but see how # 6 gos underneigth. Now think about with the angeled heads

 

So the arc originates from the main body of the boot? The only way for that to happen is if the boot were compromised. You sure it's not from the wire's entranceway? I'd think that was far more likely. In either case remove and inspect, bothe the boot and then the core pc to see how much you folded back. I'd bet that the core pc is too long.

 

Yes. The arc is at the bottom of the 90* bend and hits the header. If I pull up on the plug wire giving it another 16th it stops. Like i said Boot is NOT burnt or even looks like it hits the header. Still soft with no cracks or anything. Looks new lol.

 

I think you are going to have to observe it some more, preferably in the dark. If the boot itself is not compromised then it is arcing either from the plug tip/body or the entryway of the wire. It can not arc through the boot unless it is somehow compromised, there would be too much resistance. From the description, I'd bet it's from the plug tip under the boot. Pull the plug, really clean the threads on the head (you are using conductive antisieze yes?) and plug and try again. Pulling up should either incrrease the distance at the entryway (which you say is not the originator of the spark), or make a better connection at the plug tip, in whichj case you may not have had it 'snap' in good either. Are you using dielectric grease as well? Conductive or non?

 

Thats how I saw it. So a spark at night then discovered it. i am using the greese. we'll see what happens. Cars sleeping for the winter so I am just messing around with stuff now.

 

well as stated before the spark can NOT go though the boot. the boot is bad. my bet that part of the seal on the 90 deg trun is broken and you just can't see it. cause spar will take the path of least resistance. considering it has to travle though a resistor in the plug it will just jump though the crack to the header tube. so try replacing the boot. it's that simple