Posible for car to run better NA with N2o
08-30-2010, 11:23 PM
#1
Posible for car to run better NA with N2o Swapped my plugs for some NGK BR7efs gapped to .33 for spray and seems the car sceams at WOT better.Than the NA plugs. Am I crazy or does the car just like these better?? Had autolite 104s b4 that looked fine when I pulled them.
08-31-2010, 05:41 AM
#2
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Might have been your problem right there. I wouldn't put Autolite in my lawn mower.
08-31-2010, 02:38 PM
#7
May sound dumb, but its amazing how many people wont get a good seal on spark plug boot and run around on 7 cylinders. A local guy ran around after a cam install for about 1 1/2 month and wasent very happy... Does a plug change and realized the issue..
Also like said above a fouled plug can be the culprit.
Also like said above a fouled plug can be the culprit.
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08-31-2010, 07:01 PM
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Maybe I'm over looking the obvious but could it have been your cylinders wanted a colder plug. I think I read somewhere on NGKs website that for every 100 hp over stock you need one step colder as a starting point?? I will have to go back and reread the article to be sure. So with you making 410 to the tire thats like 480ish fw. Could be wrong?
edit - from ngk website
An unaltered engine will run within the optimum operating range straight from the manufacturer, but if you make modifications such as a turbo, supercharger, increase compression, timing changes, use of alternate racing fuels, or sustained use of nitrous oxide, these can alter the plug tip temperature and may necessitate a colder plug. A rule of thumb is, one heat range colder per modification or one heat range colder for every 75–100hp you increase. In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber.
edit - from ngk website
An unaltered engine will run within the optimum operating range straight from the manufacturer, but if you make modifications such as a turbo, supercharger, increase compression, timing changes, use of alternate racing fuels, or sustained use of nitrous oxide, these can alter the plug tip temperature and may necessitate a colder plug. A rule of thumb is, one heat range colder per modification or one heat range colder for every 75–100hp you increase. In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber.
Last edited by Carter01; 08-31-2010 at 07:12 PM.
08-31-2010, 08:19 PM
#11
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Mike I have always had 7 in my car NA or N20 and it runs great as you know. I'm going to 8's for spray to be safe now since I might up the jet as well this weekend 
09-01-2010, 03:21 PM
#19
I agree with that 110%. Autolite plugs are 100% harder to read. However, if you have a good handle on your tuneup, and know that everything is in good working order, they are a godo plug to run. I've found, that they are good for about twice as many hits as an NGK plug is before they need to be replaced.
You do, run the risk, if you are working a new tune up, or if you're running on the ragged edge (knowingly or not) of hurting something with them. I never tell anyone to go strait to the autolite unless it's an n/a car, in that case it's alot less of a risk, etc.
You do, run the risk, if you are working a new tune up, or if you're running on the ragged edge (knowingly or not) of hurting something with them. I never tell anyone to go strait to the autolite unless it's an n/a car, in that case it's alot less of a risk, etc.
