What do you guys think?
Re: What do you guys think?
Originally Posted by Mindgame
LR, can you explain what you mean by a "heavy resistor"?
FWIW, all plugs for these cars whether they be precious metal type or not are going to have a 5k ohm resistor in them for RFI suppression.
As for capacitive discharge systems... check with the manufacturer. Some race series boxes will not work with resistor type plugs and they will specify that. However, most boxes built for use with these cars carrying a CARB number will work with resistor plugs. The reasons should be obvious.
Years ago we would file ground electrodes back halfway or even full width of the center electrode. All the plug makers offer plugs this way now and the reason has to do with what they call "quenching". The goal here being to get more of the heat energy generated by the spark into combusting and less absorbtion by the spark plug surfaces. Thin wire plugs like the iridiums & platinums do much the same thing.
This is a good SAE article about Iridium plugs for those interested.
http://www.sparkplugs.com/pdfs/iri.pdf
-Mindgame
FWIW, all plugs for these cars whether they be precious metal type or not are going to have a 5k ohm resistor in them for RFI suppression.
As for capacitive discharge systems... check with the manufacturer. Some race series boxes will not work with resistor type plugs and they will specify that. However, most boxes built for use with these cars carrying a CARB number will work with resistor plugs. The reasons should be obvious.
Years ago we would file ground electrodes back halfway or even full width of the center electrode. All the plug makers offer plugs this way now and the reason has to do with what they call "quenching". The goal here being to get more of the heat energy generated by the spark into combusting and less absorbtion by the spark plug surfaces. Thin wire plugs like the iridiums & platinums do much the same thing.
This is a good SAE article about Iridium plugs for those interested.
http://www.sparkplugs.com/pdfs/iri.pdf
-Mindgame
Heavy means it weighs a lot....
The after market boxes burn the resistor UP.Then the plug has so much resistance or gap in the resistor they won't fire,especially with a .050 gap.
In an AC if ya get the plugs WITHOUT the "R" on the box it has no resistor. I have not found them to interfere with the other electronics in the car. The radio might buzz a tiny bit at certain times but don't listen to tunes when ya race.
The exotic metal plugs might do the same as short ground strap plugs but ya got to keep all the peaces attatched to the plug and working.
Last edited by 1racerdude; Jan 28, 2006 at 05:17 PM.
Re: What do you guys think?
Originally Posted by 1racerdude
Heavy means it weighs a lot....

I run a non-resistor plugs in my dragster with a 7AL-3. I had to pull a spare plug from the tool box and I don't get what you're saying LR. This plug weighs (3/4 hex) the same as the resistor-type Champions I'm running in my street cars.
Have you actually weighed the resistor plugs? What difference did you find?
The after market boxes burn the resistor UP.Then the plug has so much resistance or gap in the resistor they won't fire,especially with a .050 gap.

Never have had a problem here either. Never tried running a race box, designed for non-resistor plugs, with resistor type though. Maybe that was your problem?
In an AC if ya get the plugs WITHOUT the "R" on the box it has no resistor.
I have not found them to interfere with the other electronics in the car. The radio might buzz a tiny bit at certain times but don't listen to tunes when ya race.
FWIW, I ran 9-second 1/4 mile times with resistor plugs so I don't feel they're a problem. Misinformation can be though.
-Mindgame
Re: What do you guys think?
[QUOTE=Mindgame]Yeah, I thought that's what you meant but you never know...
I run a non-resistor plugs in my dragster with a 7AL-3. I had to pull a spare plug from the tool box and I don't get what you're saying LR. This plug weighs (3/4 hex) the same as the resistor-type Champions I'm running in my street cars.
Have you actually weighed the resistor plugs? What difference did you find?

Never have had a problem here either. Never tried running a race box, designed for non-resistor plugs, with resistor type though. Maybe that was your problem?
Nope, not if it is a manufacturer replacement plug. The 41-943 AC Platinum is a good example. It's still a resistor plug.
Nah, the PCM would be my biggest concern since it controls all the important stuff.
FWIW, I ran 9-second 1/4 mile times with resistor plugs so I don't feel they're a problem. Misinformation can be though.
-Mindgame[/QUOTE
Those AC 41-943's have platinum in them,sure they got a resistor to keep from frying the exotic metal.Hey try running them with a Joe Hunt Mag.
I don't use that kind of plug even in my lawn mower and if I hadn't had bad luck with them it may be different and I wouldn't be saying anything..
411 for ya pal a bad experience with items isn't mis information and the plug manufacturers want to sell plugs so I reckon that makes it all right.
If you don't have a problem THAT makes it alright but if I had a problem it's mis information well that's bull.
Guess ya are a very lucky fellow not to have problems.
The computer's with the non resistor Champions I run don't bat an eye they keep on trucking.
I have measured the resistance on a non firing platinum plug with a 6AL and guess what it didn't have any resistance---- It was an OPEN circuit. I know the connection evaporated. That has happened more than once or twice and I don't have time to keep changing plugs for free. Keep looking someday ya will see that too.
I run a non-resistor plugs in my dragster with a 7AL-3. I had to pull a spare plug from the tool box and I don't get what you're saying LR. This plug weighs (3/4 hex) the same as the resistor-type Champions I'm running in my street cars.
Have you actually weighed the resistor plugs? What difference did you find?

Never have had a problem here either. Never tried running a race box, designed for non-resistor plugs, with resistor type though. Maybe that was your problem?
Nope, not if it is a manufacturer replacement plug. The 41-943 AC Platinum is a good example. It's still a resistor plug.
Nah, the PCM would be my biggest concern since it controls all the important stuff.
FWIW, I ran 9-second 1/4 mile times with resistor plugs so I don't feel they're a problem. Misinformation can be though.
-Mindgame[/QUOTE
Those AC 41-943's have platinum in them,sure they got a resistor to keep from frying the exotic metal.Hey try running them with a Joe Hunt Mag.
I don't use that kind of plug even in my lawn mower and if I hadn't had bad luck with them it may be different and I wouldn't be saying anything..
411 for ya pal a bad experience with items isn't mis information and the plug manufacturers want to sell plugs so I reckon that makes it all right.
If you don't have a problem THAT makes it alright but if I had a problem it's mis information well that's bull.
Guess ya are a very lucky fellow not to have problems.
The computer's with the non resistor Champions I run don't bat an eye they keep on trucking.
I have measured the resistance on a non firing platinum plug with a 6AL and guess what it didn't have any resistance---- It was an OPEN circuit. I know the connection evaporated. That has happened more than once or twice and I don't have time to keep changing plugs for free. Keep looking someday ya will see that too.
Just pointing out that an AC part # without the "R" doesn't necessarily mean the plug doesn't have a resistor LR. Why would you have a problem with that correction?
You obviously don't understand why the resistor is in the plug if you believe it is to keep the precious metals from "frying".
For RFI suppression... nothing more.
Yeah, I'm lucky... but I'd rather be lucky than good any day.
I'll let you have the last word though... you're the expert after all.
-Mindgame
You obviously don't understand why the resistor is in the plug if you believe it is to keep the precious metals from "frying".

For RFI suppression... nothing more.
Yeah, I'm lucky... but I'd rather be lucky than good any day.

I'll let you have the last word though... you're the expert after all.
-Mindgame
Re: What do you guys think?
Originally Posted by Mindgame
Just pointing out that an AC part # without the "R" doesn't necessarily mean the plug doesn't have a resistor LR. Why would you have a problem with that correction?
You obviously don't understand why the resistor is in the plug if you believe it is to keep the precious metals from "frying".
For RFI suppression... nothing more.
Yeah, I'm lucky... but I'd rather be lucky than good any day.
I'll let you have the last word though... you're the expert after all.
-Mindgame
You obviously don't understand why the resistor is in the plug if you believe it is to keep the precious metals from "frying".

For RFI suppression... nothing more.
Yeah, I'm lucky... but I'd rather be lucky than good any day.

I'll let you have the last word though... you're the expert after all.
-Mindgame
If ya think "heavy" resistor in those plugs have anything to do with the weight of the plug,would mean ya got some research to do about plugs.
Naaaaaa I have said my piece.
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