spark plugs

What is the cross referance of a autolite 405 to a champion?

Cannot tell you that but I am sure you would be better off to go with NGK plugs since now days the champs and auto lite are junk. I have switched from the auto lite 437 to NGK3112 and they are by far better then the other 2 brands.

Thank you ,I will check into it.

(quoted from post at 13:07:02 10/31/15) Cannot tell you that but I am sure you would be better off to go with NGK plugs since now days the champs and auto lite are junk. I have switched from the auto lite 437 to NGK3112 and they are by far better then the other 2 brands.

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Sadly that is true....

I am curious.

I have been witness to numerous discussions of sparks over the years at this site.

you know the drill. champions stink autolite stink other brands are better.

I have never used anything other but champion or autolite and have not had a problem with either brand.

how does one measure the effectiveness of one spark plug brand over another?

Sort of hard to do. I do know that the last time I put in NGK plugs in a tractor and replaced to auto lite the engine has started up far better then it ever has

Prices on Amazon are all over the map.

o'reileys ordered some in for me, not much more than the other brands ($0.50 apiece). I've noticed they don't foul nearly as easy for one. I work with a couple guys who race vehicles with high end engines and they've told me the NGK are the only thing they'll run, supposedly better in every way they can be. the extra couple of bucks is worth it to me to know if I get a problem its not the plug...

(quoted from post at 07:06:50 11/01/15) I am curious.

I have been witness to numerous discussions of sparks over the years at this site.

you know the drill. champions stink autolite stink other brands are better.

I have never used anything other but champion or autolite and have not had a problem with either brand.

how does one measure the effectiveness of one spark plug brand over another?

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I have a old style spark plug tester where it test the plugs under compression. It as a window so you can see the plug firing. In the old days...70s you could test plugs and anytime you go above 120 lbs of compression, the plugs would start failing. So, if you had a low compression engine, most any plug would work. If you had a high compression engine the story changed... BACK then,, the ac plugs tested around a 100% on a box of 8.. the Champion plugs tested 7 out of 8.. the autolite tested 5 out of 8 good. Especially when you ran the tester upwards to 150 on the plugs rated for high compression engines. Later the jap plugs came along and they always tested 100 %... spin up to modern days, where most plugs are now made elsewhere and ngk are about the only ones that fire well on the high compression engine. most lawn mower plugs fail or cut off around 100 lbs. How ever 1 out of 5 will test fine up to 130 or 140lbs.... same brand of cheap murry or whatever wallmart carries. So if your like me and have 13 1960s high compression honda motocycles you collect, the plugs are everything. Even some of ngks will fail. there is a paint bucket full of the plugs that dont pass the test.

Now on some of the 60s generators, pumps, tractors, and even the miller 200 welder, the autolite plugs work very well. Dont ask me why but they seem to have those plugs designed well if not better than others,, but they are "OLD stock" and probably running at about 110 lbs of compression, 120 max.