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Discussion Starter · #1 ·
Recently I've experimented with plug gap, just to see what
voltage limits my Viper was capable of. My conclusion is that closer to
.030 the better - anything over .035 is questionable - .040 causes my
car to 'flutter' at WOT. This was w/ and w/o nitrous.
 

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Discussion Starter · #4 ·
Gerald, I picked that plug because that's what was available in the
heat range - ground strap - I was looking for.
I had the parts store show me a plug from NGK , autolite, and Champion
all crossreferenced - and the only one that they had enough of was the
Champion. - but I'm pleased with my selection -

Right now I'm running .030 gap - and it seems to be right
 

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HP...I currently am running the NGK ZFR6F-11...But I have a brand new set of Autolite 3923 that I thought about trying on...


0.030 gap duly noted...
 

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Discussion Starter · #6 ·
Gerald I did a search on VCA plugs/nitrous and I think I picked the NGK
plug you have - anyway the 3 brand plugs I looked at -including my NGK reference-
looked exactly the same, as far as visual aspects -
So I would doubt there would be any noticeable difference - if you have another
set use them - it just happened that the Champions were the only brand that
I could get a full set. I'm assuming the NGK you have is one recommended off
the VCA board. It appears to be a few clicks colder - shorter electrode.

Odd thing is, the Champions I got - were never listed by anyone in my search -
nor were they listed on the Champion website.
 

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Discussion Starter · #7 ·
For anyone else tuning in - this is how Gerald and I communicate.
If your car is stock and doing well - keep your stock recommended plugs
with your stock plug gap.
 

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So should a guy like me with a 95 and 2K miles switch to a Champion RC9MC4? Don't tease me about the miles...I just got it last year.
 

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The stock Champion RC12LYC plugs are fine, HP and I are refering to nitrous applications, where colder plugs are required...


2K on a 95??? holy shit!
 

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So is .030 recommended on a stock engine(no NOS)? I always thought that as long as the spark was strong, the wider the better? I have mine at .040 and have not experieced the flutter.
 

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96 R/T 10 said:
So is .030 recommended on a stock engine(no NOS)? I always thought that as long as the spark was strong, the wider the better? I have mine at .040 and have not experieced the flutter.
When you throw the N20 to the cylinders, a bigger gapped plug could actually get the spark "blown out"...therefore a smaller gap is recommended...
 

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Discussion Starter · #14 ·
Snake Bitten said:
96 R/T 10 said:
So is .030 recommended on a stock engine(no NOS)? I always thought that as long as the spark was strong, the wider the better? I have mine at .040 and have not experieced the flutter.
When you throw the N20 to the cylinders, a bigger gapped plug could actually get the spark "blown out"...therefore a smaller gap is recommended...
Gerald I observed the same thing without the nitrous. I think the secondary
voltage is just maxed out at that gap. I think for the stock plug the upper gap is .035 There was a thread the other day
on S/Ced cars - and someone mentioned .028 as a reference. Denser charges
from the higher cylinder pressure of nitrous and S/C limit the amount of gap
further.
 
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