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11-18-2009 09:23 AM #1
Spark plug recommendations please
So it seems like I should try a *colder* plug than what I have now which is Champion*Single Platinum #3983*- Heat Range 12 - tapered seat.
In doing a bit of research it looks like I could go with the Champion*#3346, which is also a single platinum plug but with a Heat Range of 10 and it is gasketed seat vs. tapered seat and has a projected tip - not sure what effect the seat and tip have.
I could go with traditional plugs too, more options there it seems...
Also Resistor Core plugs are available, not sure if that would be applicable to my build, which is as follows:
-350 SBC, 9:1 compression
-Cam: 214/224 duration (280/290 adv) with .443/.465 lift @50
-GM Cast Iron Vortec Heads
-Edelbrock Performer RPM Air Gap Intake
-600 CFM Carb (mine is a Carter AFB)
-corvette exhaust manifolds
Looking for spark plug recommendations and suggestions please! I like to keep it low tech on things like this, $1.49 plugs you can get anywhere are much preferred to $50 a pair gucci plugsBurning gunpowder and gasoline daily for over 20 years and counting!
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11-18-2009 09:41 AM #2
I believe there is a list of heat ranges ,your auto parts store has it, it might be a good idea to go down a step with cheaper plugs if it doesnt cure the go to the next step down.Friends dont let friends drive fords!
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11-18-2009 11:50 AM #3
Autozone can't do this, Pepboys can't do this, Kragen can't do this - all they can do is look up by vehicle, if I ask for the next colder plug they don't even know what I am talking about, kids these days...
The next step down I have been able to identify are $2 plugs, heat range of 10 vs. 12 and have gasketed seat vs. tapered seat, otherwise thread pitch and length are the same.
What thinks ye?Burning gunpowder and gasoline daily for over 20 years and counting!
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11-18-2009 10:12 AM #4
the spark plug transfers heat to the cyl head to cool it if you use the wrong seat plug for your you limit that heat transfer your plugs maybe getting too hot causing pre ignition or pinging ......tedI'LL KEEP MY PROPERTY, MY MONEY, MY FREEDOM, AND MY GUNS, AND YOU CAN KEEP THE CHANGE------ THE PROBLEM WITH LIBERALISM IS SOONER OR LATER YOU RUN OUT OF OTHER PEOPLES MONEY margaret thacher 1984
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11-18-2009 11:47 AM #5
Understood, thank you
The plugs I was using before were not even making it into the comb chamber, they were too short! Don't ask how those got in there...
The question regarding tapered seat vs. gasketed seat (same thread depth) is in regards to the *colder* plugs I have been able to identify that will work with my application, the only difference is they have gasketed seats vs. the tapered seat plugs I am running now - not sure if that would be an issue or not, I suspect not but would like to hear from someone that knows for sureBurning gunpowder and gasoline daily for over 20 years and counting!
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance