Thread: SBC spark plugs

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Hi all , im new here and thot i would post a question. I have a 1970
350. Pretty much stock, points ignition, eddy 1406 on an offy 360 intake. What brand plugs do you all prefer ? I put ac R44t in and had
A dead plug in 2 different sets ! Are autolite any good ? Having a
Hard time finding champion plugs that cross to an r44t. Any suggestions ? Can we say streetrod on this site ?

Dennyw. Thanks for The info. I gapped them at .035 I have no photos , I returned each set to the part store. I know parts arent made as well as in the past but it seemed weird that 2 sets from the same place would have a dud. I put autolites in it and it seems to be happy with them. I never ran autolites in a gm engine but so far so good.

I run E3's in my 76 Corvette and have had no problems

33plym,
Welcome to CHR! Yes, you can say Street Rod here!

Sadly your experience with the old conventional AC plugs isn't a surprise these days. Their QC has become really, really bad! The old days of AC being best for GM, Autolite for Ford, Champion for Chrysler just doesn't ring true for me any more, and if you look at what Chevy/GM uses today you'll find it's mostly NGK, Denso and a few with MotorCraft. From Chevy forums they seem to be leaning to NGK as being the best all around plug for the Gen 1 350 SBC. For me, NGK has been my plug of choice for close to 20 years now, and that's what I run in my Ford 347 stroker and what will be in the 350 ZZ4 if I ever get that one finished!

When you have time, post some pictures of your Plymouth! It's kind of dated now, but here's a link that gives the basics of posting into a thread. I find the Gallery to be a PITA, mainly because everything is just in a common list and finding anything specific is a hassle.

http://www.clubhotrod.com/shop-talk/...es-thread.html

Rspears, thanks for the info and I’m happy i can say streetrod! I was going to try ngk but they had to order them in so i took the autolites. They’re working well so they can stay right where they are. If i can figure pictures out I’ll definitely post them.

Thanks again

Hope this photo works

Rio red. Nice and bright

It was painted 21 years ago !! Its laquer and its cracking as would be expected. Too bad because it was a beautiful paint job. Your truck will look great !! Isn’t it amazing that cars and trucks from the 30’s are still good looking vehicles.

That Plymouth is sharp!

I recently put a new set of AC plugs in my 95 Camaro, which has a V6. It ran good for about 500 miles. Then it started having an intermittent, random misfire for the next 500 miles. It eventually turned into a solid miss. One of the plugs had failed. The plug looked fine, but I changed just one plug and the engine runs great now. I’d never seen that before. Maybe it’s time to switch to NGK or something.

As I stated earlier I've had good luck with E3's in my Vette and I also run then in an 04 Dodge Dakota. A couple of years ago I drove from Springfield, Mo to Columbia, SC, about 870 miles one way, in the Dakota and averaged right at 20 mpg. Not too bad for a pickup and a driver with a heavy foot.

Originally Posted by Driver50x

That Plymouth is sharp!

I recently put a new set of AC plugs in my 95 Camaro, which has a V6. It ran good for about 500 miles. Then it started having an intermittent, random misfire for the next 500 miles. It eventually turned into a solid miss. One of the plugs had failed. The plug looked fine, but I changed just one plug and the engine runs great now. I’d never seen that before. Maybe it’s time to switch to NGK or something.

Thanks for the compliment on my car
That’s exactly what happened to me. Cant buy much of anything thats good anymore I do have autolites in it now and so far its running great

Originally Posted by NTFDAY

As I stated earlier I've had good luck with E3's in my Vette and I also run then in an 04 Dodge Dakota. A couple of years ago I drove from Springfield, Mo to Columbia, SC, about 870 miles one way, in the Dakota and averaged right at 20 mpg. Not too bad for a pickup and a driver with a heavy foot.

Yep, i ran them e3s in my dodge ram and it did get better mileage. Not much but anything in that hog was a bonus

I run NGK. For a sbc i believe the correct gap is .035