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#1
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lookin for a GREAT race sparkplug!
Once again, I am looking for some info from you guys out there that have had any good luck with a particular "race" plug for my 440...well actually 538
I've looked into NGKr's and also Autolite has a race plug. I wonder if anyone has tried those E3 plugs??? Looking for part's and positive feedback. I'll be running 11.75:1 compression, race fuel, some street...mostly strip, want a plug that will do me well all summer long As Always...thanks a bunch! |
#2
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I use NGKs, and with an MSD system, and good wires, set the gap at .060. I also cut back the negative electrode to expose more of the top of
the positive. That allows a bigger flame kernel to be exposed to the combustion chamber. Don't think you can do much better than a setup like this, but I'm not 100% sure. |
#3
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I use the NGK R5671A-8. The -8 is heat ranged for aluminum head Race gasoline. (I run E-85 which is equivalent) If you run iron head you may consider a -7 (A little warmer thus dissipates heat a little sooner.) If you run Methanol then the -9. These of course are starting points. Reading your plugs is the key.
I have not used E3s. But like you I'm curious. They say flame travel speed is increased (In micro seconds) but this does provide a slightly better burn efficiency. My head guy has tested on his dyno with no measureable increase in power than a comparable Autolite or NGK. The NGK I have found seems to last longer than the Autolite. I hope this helps. Spark Plugs don't seem to be an exact science. A friend of mine swears by Champions. (And I have seen the better results with his BBC) Yet my motor chews them up (or gunks them) quickly. |
#4
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Can you get SplitFires there?
My nephew tried them on HQ race cars running about 12:1 compression and got extra horsepower over the best he'd tried till then. I might try to get him to log in to this thread and tell what he knows, he has tried a lot of stuff. |
#5
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NGK plugs are sold specific to your compression ratio.
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#6
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I am running Autolite AR3910 with Indy heads 14.15:1 compression with MSD distributor wires and Digital box with no trouble at all. The are cheaper than the Champion race plugs and my engine builder recommended them as Autolite is what he runs in his B/SS car.
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#7
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NGKs get my vote.
AVOID Champion plugs like the plague. |
#8
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I use NGK's, gapped to .040" with MSD. Under 12:1, heat range 6, or 7 at max. Too cold and the pluggs foul easily, too hot and they melt. We use 7's in our pump gas 477 that makes 1580 hp. I don't believe there is any magic in the spark plugs, it either does its job or doesn't. Just use the brand that you feel comfortable with, is the right heat range and works.
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#9
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And we won't even get into indexing!!
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#10
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I love Champion Spark plugs..........
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#11
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Champions are the best, the other ones are the No Good Kind.
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#12
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Could probably test 15 different plugs and see only a max horsepower
variance of 5 hp! |
#13
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haha, you are correct except if you are running fouled plugs, then the results can be drastic...
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#14
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Again I ask, have you tried Splitfires?
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#15
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Plugs
Ray
I tried them a few years back and had lots of problems with them. They did not create an even burn and I damaged 4 pistons in the motor. Personally I have had the best luck with Champions and just working my way through the heat ranges until things came together the way I wanted. Not the most scientific way but worked for me. |
#16
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Funny that...
Young Ben has tried a lot of things, spends a fair bit of time at the dyno, he'd decided that one NGK was the best he could get and then, with prompting, tried the Splitfires along with their leads. He got a 4hp improvement following the recommendation of the distributor... recommendations relating to how much advance to run and so on. |
#17
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I have had splitfires too, and some other "magic plugs" like ones with four side electrodes and Brisk plugs with no side electrode at all. In my opinion, waste of money where a regular plug would perform as well.
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#18
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I have been trying to figure out a good plug for Street/Strip use.
The claims from the E3 plug sound great, but I have read they have some quality control issues. I have also been tempted to try TT plugs. But then I talked about it with my parts guy today and he claims that he talked to an MSD rep who told him just use a good traditional plug and replace it regularly when using a 6AL. I am currently using Autolite Platinmums in my magnum, gapped to .035. Would gapping them further gain us anything? we are using a MSD 6AL and MSD coil. |
#19
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If you have an MSD, then just run the standard Autolite copper plugs, I would suggest starting with around a heat range of 4 and see if you can get away with it. The platinum plugs usually work very well on a stock ignition on a worn out engine, but not so will with a multi-spark etc... Run the absolute coldest plug that won't foul, these will give you the best performance. The magnums have a very good combustion chamber, and plug placement, so the gimmick plugs are just that.... And yes I would also open up the gap another .010...
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#20
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I didnt know you could gap a platinum plug? Splitfires tend to lose their electrodes, a few stories about them floating around (I have a set of splitfire "classics" that I pulled out of a truck motor, they have no ceramic ribs!) I was partial to Nippondenso U-groove plugs when I was running a stoicker and they seemed to work fine, dont like Champions, they deteriorate faster than AC's which is what I run now, but Im bush league when it comes to hot rods, many know more than I do. NGK seems to have a very broad range of plugs if you really want to dial it in.
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